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Robu.in | Indian Online Store | RC Hobby | Robotics
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      • Component Kit
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      • Inductor
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      • Diode
      • Transistor
      • Crystal Oscillators
    • Semiconductor ICs
      • Microcontroller ICs
      • Interface ICs
      • Clock, Timer and Counter ICs
      • Sensor ICs
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      • Encoder ICs
      • Audio ICs
      • IC Base
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      • Through Hole LED
      • SMD LED
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      • Potentiometer
      • Fuse
      • Buzzer/Speaker
      • Aluminium Heat Sink
      • Bread Board and Zero PCB
    • Mechanical Switches
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    • Interface Connector
    • Berg / FPC / IDC Connector
  • DIY Learning and Robot Kits
    • Orange Premium Learning Kits
      • Orange Kits for Arduinos
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      • Orange Electronic Component Kits
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    • Ebike Kit
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    • Sensor Kits
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  • Drone Parts
    • Kits
    • Frames and Accessories
    • Flight Controller & Accessories
    • Motors
    • Speed Controllers (ESC)
    • Drone Propellers
      • Upto 3 Inch
      • 3 Inch to 7 Inch
      • 8 Inch to 10 Inch
      • 11 Inch and Above
      • Carbon Fiber Propeller
      • Triblades
      • Propeller Nuts and Accessories
    • Drone Transmitter & Receiver
    • Antennas
    • FPV Cameras
    • FPV Antennas and Trans-Receivers
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    • Camera Gimbal
  • E-Bike Parts
    • Ebike Kit
    • Ebike Motor and Controller
    • Ebike Battery
    • Mechanical Accessories
    • Electronics Accessories
  • 3D Printers and Parts
    • Creality 3D Printers
    • Electronics Parts
      • 3D Printer Display and Controllers
      • 3D Printer Extruder Kit
      • 3D Printer Extruder Parts and Fans
      • Stepper Motors and Accessories
      • 3D Printer Display and Controller
      • Limit Switch
    • Mechnical Parts
      • 3D Printer Heatbed and Accessories
      • 3D Printer Nozzle
      • Lead Screw and Nut
      • Linear Rail Guides
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • 3D Printer Coupling
      • Timing Belt and Pulley
      • Sleeves and Drag Chain
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      • ORANGE Premium Filaments
      • ESUN Filaments
      • Resins
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    • Custom Battery Pack
    • Lemon Premium Li-PO Battery
      • 2S Lipo (7.4V ~ 8.4V)
      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Micro LiPo Batteries
    • Lithium-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
      • 4 Cell (14.8V~16.8V)
      • 5 Cell (18.5V) & Above
    • Orange Premium BMS
    • Other Batteries
      • TX/RX Li-PO Batteries
      • LifePO4 Battery
      • Coin Cell Battery
      • CNC and PLC Machine Battery
    • Battery Accessories
      • Battery Protection Board
      • Battery Pack Accessories & Holders
      • Battery Chargers
      • Battery Connector
      • Battery Harness
      • Power Adapter and Cable
      • Lipo Voltage Checker
      • Parallel Charging Board
      • LiPO Battery Sack, Covers & Mats
  • Motors, Drivers, Actuators
    • Planetary Gear Motor
      • Orange Planetary Gears Motor
      • Orange Planetary BLDC Motors
      • Planetary Gear DC Motors
    • Brushed DC Motor
      • Orange Johnson Geared Motor
      • Johnson Geared Motor (Grade B)
      • DC Geared Motor with Encoder
      • 25 GA Motors
      • Orange OG 555 DC Motor
      • RS 50 Geared Motor
      • Orange RS 775 DC Motor
      • Orange PM33 Motor
      • Orange Square Gear Box Motor
      • Orange Rectangular Gearbox Motor
    • N20 Micro Gear Motor
      • Micro Gear Motor with Encoder
      • Micro Gear Motor without Encoder
    • Stepper Motor
    • Servo Motors
      • Orange RC Servo Motors
      • Emax Servo Motor
      • Other Servo motor
    • Pumps
      • Kamoer High Quality Pumps and Accessories
      • Generic Pumps
      • Pneumatic Connectors and Valves
    • Cooling Fans
    • Linear Motor/Actuator
    • Solenoids & Electromagnets
    • Other DC Motors
      • BO Motors
      • Metal Gear Box Motor
      • Plastic Gear Box Motors
      • Vibration Motor
      • Drone Motor
    • Motor Drivers
      • Brushed DC Motor Driver
      • Servo Motor Driver
      • Stepper Motor Drivers
      • Brushless DC Motor Driver (ESC)
    • Motor Accessories
      • Motor Mounting Brackets
      • Bearings
      • Couplings
      • JR Servo Cable
      • Futaba Servo Cable
      • Push Rod
      • Other Accessories
  • Development Board
    • Official Arduino Boards
      • Original Arduino Boards
      • Official Arduino Shields
      • Official Arduino Kits
    • Raspberry Pi
    • 8051 Board
    • Single Board Computer
    • Teensy Board
    • Udoo Board
    • ARM Microcontroller
    • PIC Development board
    • Programmers
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      • Boards
      • Shields
      • USB Cables for Arduino
      • Displays
      • Case for Arduino
  • Official Arduino Boards
    • Original Arduino Boards
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    • Official Boards and Hats
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    • Display
    • Camera
    • Raspberry Pi Hats
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  • Displays
    • HMI LCD Display
    • LCD Displays
    • OLED Display
    • e-Ink Display
    • Seven Segment LED Display
    • LED Dot Matrix Display
  • Sensors
    • Sensor Kits
    • Ultrasonic and Proximity
      • MAXBOTIX Ultrasonic Sonar
      • Ultrasonic Sensor
      • Orange Proximity Sensor
      • Autonics Proximity Sensor
      • Other Proximity Sensor & Modules
      • LiDAR Sensor
      • Other Ultrasonic Sensors
    • Temp., Humidity, Gas & Environmental
      • Temperature & Humidity Sensor
      • Environmental Sensors
      • Gas and Dust Sensor
      • Thermoelectric Cooler
    • Motion, Light and Sound
      • PIR / IR and Optical Sensor
      • RFID Card, Tags & Reader
      • Light/Color Sensor
      • Line Sensor
      • Sound Sensor
    • Biometric, Rotation, and Current
      • Biometric/ECG/EMG Sensor
      • Rotary Encoder
      • Current and Voltage
    • Load, Pressure, Flow & Vibration
      • Water TDS, pH, Flow, Level and Pressure Sensor
      • Vibration/Tilt Sensor and Modules
      • Load / Pressure / Force / Flex Sensor
  • Cameras
    • IoT Cameras
    • FPV Cameras
    • Smart Vision Camera
    • Thermal Cameras
    • Raspberry Pi Camera
  • IoT and Wireless
    • Ai Thinker ESP Modules and Development Boards
    • ESP WiFi Module
    • Development Board/Kit
    • xBee Zigbee Module
    • LORA WiFi
    • Bluetooth and NRF Modules
    • GSM / GPRS Modules
    • Transmitter and Receivers
    • Advance Controller Board
    • Wireless Smart Switches
  • Electronic Modules
    • Programming Module
    • Memory Interfacing
    • Communication Module
    • Bluetooth Interfacing
    • Ethernet Module
    • Interface Module
    • LED Module
    • LASER Module
    • Addressable LED and Drivers
    • Breakout Board
    • Relay Switch Modules
    • Electronic Switches/Keypads
    • Solar Panels and Controllers
    • Wearable Electronic
    • Real Time Module (RTC)
    • Audio Module/ Amplifier
    • Mux-DeMux & Logic Converter
    • Voltage Regulator
      • Boost Converter (Step-Up )
      • Buck Converter (Step-Down)
    • Measuring Instruments
      • Digital Multimeter
      • Temperature Meter
      • Digital Voltage, Current and Frequency Meter
      • Oscilloscope & Signal Generator
      • Other Measuring Instrument
    • Power Supply
      • Transformers
      • SMPS
      • Hi-Link Power Supply Module
    • Displays
  • Wires and Cables
    • PVC and Silicone Wires
      • PVC Wire
      • 6 to 10 AWG
      • 12 to 16 AWG
      • 18 to 22 AWG
      • 24 to 30 AWG
    • Multi-Color Project Cables
      • DuPont / Jumper Cable
      • Interfacing Cables
      • JR Servo cable
      • Futaba servo cable
      • FFC Cable
    • Heat Shrink Tubing / Sleeve
      • Heat Shrink Combos
      • 1 mm to 4 mm
      • 5 mm to 10 mm
      • 11 mm and Above
      • PVC Heat Shrink
    • Tools and Accessories
      • Wire Cutter / Stripper
      • Cable Ties
      • Sleeves and Drag Chain
  • Mechanical Components and Workbench Tools
    • Mechanical Robotic Parts
      • Chassis
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • Lead Screw
      • Linear Rail Guides
      • Couplings
      • Bearings
      • Motor Mounting Brackets
      • Gears
    • Wheels
      • Mecanum Wheels
      • Omni Wheels
      • Heavy Duty Wheel
      • RC Car Wheel
      • Pulley Wheel & Track Belt
      • Caster Wheels
    • Carbon Fiber
      • Carbon Fiber Sheets and Strips
      • Carbon Fiber Tubes and Rods
    • Nuts-Bolts and Spacers
      • Countersunk(CSK) Screws
      • Socket Set Screws (Allen Grub)
      • Socket Head Cap Screw (Allen Bolt)
      • CHHD Screws
      • Nut and Washers
      • Nylon Nuts and Bolts
      • Spacer and Standoff
    • Soldering Tools
    • Workbench Tools
  • Services
    • PCB Manufacturing Service
    • Custom Battery Pack
    • Online SLA 3D Printing Service
    • Online FDM 3D Printing Service
    • Metal Laser Cutting Service
    • Non-Metal Laser Cutting Service
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All Categories
  • Shop by Brands
  • New Arrivals
  • Refurbished
  • Partial Working
  • Electronic Components
    • Basic Electronic Components
      • Component Kit
      • Resistor
      • Inductor
      • Capacitor
      • Diode
      • Transistor
      • Crystal Oscillators
    • Semiconductor ICs
      • Microcontroller ICs
      • Interface ICs
      • Clock, Timer and Counter ICs
      • Sensor ICs
      • Optocoupler ICs
      • Converter ICs
      • Comparator ICs
      • Driver ICs
      • Encoder ICs
      • Audio ICs
      • IC Base
    • LEDs and Indicators
      • LEDs Kit
      • Pilot Lamp Indicator
      • LEDs with Holders
      • Through Hole LED
      • SMD LED
    • Miscellaneous Component
      • Potentiometer
      • Fuse
      • Buzzer/Speaker
      • Aluminium Heat Sink
      • Bread Board and Zero PCB
    • Mechanical Switches
    • Power Connectors
    • RF Connectors
    • Interface Connector
    • Berg / FPC / IDC Connector
  • DIY Learning and Robot Kits
    • Orange Premium Learning Kits
      • Orange Kits for Arduinos
      • Orange Kits for Raspberry Pi
      • Orange Electronic Component Kits
      • Orange DIY Mini Project Kits
    • DIY Hobby Project Parts
    • Robot Kits and Parts
    • Drone Kit
    • DIY 3D Printer Kits
    • Ebike Kit
    • Official Raspberry Pi Kits
    • Kits compatible with Arduino
    • Sensor Kits
    • Component Kit
  • Drone Parts
    • Kits
    • Frames and Accessories
    • Flight Controller & Accessories
    • Motors
    • Speed Controllers (ESC)
    • Drone Propellers
      • Upto 3 Inch
      • 3 Inch to 7 Inch
      • 8 Inch to 10 Inch
      • 11 Inch and Above
      • Carbon Fiber Propeller
      • Triblades
      • Propeller Nuts and Accessories
    • Drone Transmitter & Receiver
    • Antennas
    • FPV Cameras
    • FPV Antennas and Trans-Receivers
    • Accessories
    • Camera Gimbal
  • E-Bike Parts
    • Ebike Kit
    • Ebike Motor and Controller
    • Ebike Battery
    • Mechanical Accessories
    • Electronics Accessories
  • 3D Printers and Parts
    • Creality 3D Printers
    • Electronics Parts
      • 3D Printer Display and Controllers
      • 3D Printer Extruder Kit
      • 3D Printer Extruder Parts and Fans
      • Stepper Motors and Accessories
      • 3D Printer Display and Controller
      • Limit Switch
    • Mechnical Parts
      • 3D Printer Heatbed and Accessories
      • 3D Printer Nozzle
      • Lead Screw and Nut
      • Linear Rail Guides
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • 3D Printer Coupling
      • Timing Belt and Pulley
      • Sleeves and Drag Chain
    • 3D Printer Filaments
      • ORANGE Premium Filaments
      • ESUN Filaments
      • Resins
  • Batteries, Chargers and Accessories
    • Custom Battery Pack
    • Lemon Premium Li-PO Battery
      • 2S Lipo (7.4V ~ 8.4V)
      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Micro LiPo Batteries
    • Lithium-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
      • 4 Cell (14.8V~16.8V)
      • 5 Cell (18.5V) & Above
    • Orange Premium BMS
    • Other Batteries
      • TX/RX Li-PO Batteries
      • LifePO4 Battery
      • Coin Cell Battery
      • CNC and PLC Machine Battery
    • Battery Accessories
      • Battery Protection Board
      • Battery Pack Accessories & Holders
      • Battery Chargers
      • Battery Connector
      • Battery Harness
      • Power Adapter and Cable
      • Lipo Voltage Checker
      • Parallel Charging Board
      • LiPO Battery Sack, Covers & Mats
  • Motors, Drivers, Actuators
    • Planetary Gear Motor
      • Orange Planetary Gears Motor
      • Orange Planetary BLDC Motors
      • Planetary Gear DC Motors
    • Brushed DC Motor
      • Orange Johnson Geared Motor
      • Johnson Geared Motor (Grade B)
      • DC Geared Motor with Encoder
      • 25 GA Motors
      • Orange OG 555 DC Motor
      • RS 50 Geared Motor
      • Orange RS 775 DC Motor
      • Orange PM33 Motor
      • Orange Square Gear Box Motor
      • Orange Rectangular Gearbox Motor
    • N20 Micro Gear Motor
      • Micro Gear Motor with Encoder
      • Micro Gear Motor without Encoder
    • Stepper Motor
    • Servo Motors
      • Orange RC Servo Motors
      • Emax Servo Motor
      • Other Servo motor
    • Pumps
      • Kamoer High Quality Pumps and Accessories
      • Generic Pumps
      • Pneumatic Connectors and Valves
    • Cooling Fans
    • Linear Motor/Actuator
    • Solenoids & Electromagnets
    • Other DC Motors
      • BO Motors
      • Metal Gear Box Motor
      • Plastic Gear Box Motors
      • Vibration Motor
      • Drone Motor
    • Motor Drivers
      • Brushed DC Motor Driver
      • Servo Motor Driver
      • Stepper Motor Drivers
      • Brushless DC Motor Driver (ESC)
    • Motor Accessories
      • Motor Mounting Brackets
      • Bearings
      • Couplings
      • JR Servo Cable
      • Futaba Servo Cable
      • Push Rod
      • Other Accessories
  • Development Board
    • Official Arduino Boards
      • Original Arduino Boards
      • Official Arduino Shields
      • Official Arduino Kits
    • Raspberry Pi
    • 8051 Board
    • Single Board Computer
    • Teensy Board
    • Udoo Board
    • ARM Microcontroller
    • PIC Development board
    • Programmers
    • Advance Development Boards
    • Compatible with Arduino Boards
      • Boards
      • Shields
      • USB Cables for Arduino
      • Displays
      • Case for Arduino
  • Official Arduino Boards
    • Original Arduino Boards
    • Official Arduino Shields
    • Official Arduino Kits
  • Raspberry Pi
    • Official Boards and Hats
    • Official Accessories
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    • Display
    • Camera
    • Raspberry Pi Hats
    • Accessories
  • Displays
    • HMI LCD Display
    • LCD Displays
    • OLED Display
    • e-Ink Display
    • Seven Segment LED Display
    • LED Dot Matrix Display
  • Sensors
    • Sensor Kits
    • Ultrasonic and Proximity
      • MAXBOTIX Ultrasonic Sonar
      • Ultrasonic Sensor
      • Orange Proximity Sensor
      • Autonics Proximity Sensor
      • Other Proximity Sensor & Modules
      • LiDAR Sensor
      • Other Ultrasonic Sensors
    • Temp., Humidity, Gas & Environmental
      • Temperature & Humidity Sensor
      • Environmental Sensors
      • Gas and Dust Sensor
      • Thermoelectric Cooler
    • Motion, Light and Sound
      • PIR / IR and Optical Sensor
      • RFID Card, Tags & Reader
      • Light/Color Sensor
      • Line Sensor
      • Sound Sensor
    • Biometric, Rotation, and Current
      • Biometric/ECG/EMG Sensor
      • Rotary Encoder
      • Current and Voltage
    • Load, Pressure, Flow & Vibration
      • Water TDS, pH, Flow, Level and Pressure Sensor
      • Vibration/Tilt Sensor and Modules
      • Load / Pressure / Force / Flex Sensor
  • Cameras
    • IoT Cameras
    • FPV Cameras
    • Smart Vision Camera
    • Thermal Cameras
    • Raspberry Pi Camera
  • IoT and Wireless
    • Ai Thinker ESP Modules and Development Boards
    • ESP WiFi Module
    • Development Board/Kit
    • xBee Zigbee Module
    • LORA WiFi
    • Bluetooth and NRF Modules
    • GSM / GPRS Modules
    • Transmitter and Receivers
    • Advance Controller Board
    • Wireless Smart Switches
  • Electronic Modules
    • Programming Module
    • Memory Interfacing
    • Communication Module
    • Bluetooth Interfacing
    • Ethernet Module
    • Interface Module
    • LED Module
    • LASER Module
    • Addressable LED and Drivers
    • Breakout Board
    • Relay Switch Modules
    • Electronic Switches/Keypads
    • Solar Panels and Controllers
    • Wearable Electronic
    • Real Time Module (RTC)
    • Audio Module/ Amplifier
    • Mux-DeMux & Logic Converter
    • Voltage Regulator
      • Boost Converter (Step-Up )
      • Buck Converter (Step-Down)
    • Measuring Instruments
      • Digital Multimeter
      • Temperature Meter
      • Digital Voltage, Current and Frequency Meter
      • Oscilloscope & Signal Generator
      • Other Measuring Instrument
    • Power Supply
      • Transformers
      • SMPS
      • Hi-Link Power Supply Module
    • Displays
  • Wires and Cables
    • PVC and Silicone Wires
      • PVC Wire
      • 6 to 10 AWG
      • 12 to 16 AWG
      • 18 to 22 AWG
      • 24 to 30 AWG
    • Multi-Color Project Cables
      • DuPont / Jumper Cable
      • Interfacing Cables
      • JR Servo cable
      • Futaba servo cable
      • FFC Cable
    • Heat Shrink Tubing / Sleeve
      • Heat Shrink Combos
      • 1 mm to 4 mm
      • 5 mm to 10 mm
      • 11 mm and Above
      • PVC Heat Shrink
    • Tools and Accessories
      • Wire Cutter / Stripper
      • Cable Ties
      • Sleeves and Drag Chain
  • Mechanical Components and Workbench Tools
    • Mechanical Robotic Parts
      • Chassis
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • Lead Screw
      • Linear Rail Guides
      • Couplings
      • Bearings
      • Motor Mounting Brackets
      • Gears
    • Wheels
      • Mecanum Wheels
      • Omni Wheels
      • Heavy Duty Wheel
      • RC Car Wheel
      • Pulley Wheel & Track Belt
      • Caster Wheels
    • Carbon Fiber
      • Carbon Fiber Sheets and Strips
      • Carbon Fiber Tubes and Rods
    • Nuts-Bolts and Spacers
      • Countersunk(CSK) Screws
      • Socket Set Screws (Allen Grub)
      • Socket Head Cap Screw (Allen Bolt)
      • CHHD Screws
      • Nut and Washers
      • Nylon Nuts and Bolts
      • Spacer and Standoff
    • Soldering Tools
    • Workbench Tools
  • Services
    • PCB Manufacturing Service
    • Custom Battery Pack
    • Online SLA 3D Printing Service
    • Online FDM 3D Printing Service
    • Metal Laser Cutting Service
    • Non-Metal Laser Cutting Service
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      • Component Kit
      • Resistor
      • Inductor
      • Capacitor
      • Diode
      • Transistor
      • Crystal Oscillators
    • Semiconductor ICs
      • Microcontroller ICs
      • Interface ICs
      • Clock, Timer and Counter ICs
      • Sensor ICs
      • Optocoupler ICs
      • Converter ICs
      • Comparator ICs
      • Driver ICs
      • Encoder ICs
      • Audio ICs
      • IC Base
    • LEDs and Indicators
      • LEDs Kit
      • Pilot Lamp Indicator
      • LEDs with Holders
      • Through Hole LED
      • SMD LED
    • Miscellaneous Component
      • Potentiometer
      • Fuse
      • Buzzer/Speaker
      • Aluminium Heat Sink
      • Bread Board and Zero PCB
    • Mechanical Switches
    • Power Connectors
    • RF Connectors
    • Interface Connector
    • Berg / FPC / IDC Connector
  • DIY Learning and Robot Kits
    • Orange Premium Learning Kits
      • Orange Kits for Arduinos
      • Orange Kits for Raspberry Pi
      • Orange Electronic Component Kits
      • Orange DIY Mini Project Kits
    • DIY Hobby Project Parts
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    • DIY 3D Printer Kits
    • Ebike Kit
    • Official Raspberry Pi Kits
    • Kits compatible with Arduino
    • Sensor Kits
    • Component Kit
  • Drone Parts
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    • Frames and Accessories
    • Flight Controller & Accessories
    • Motors
    • Speed Controllers (ESC)
    • Drone Propellers
      • Upto 3 Inch
      • 3 Inch to 7 Inch
      • 8 Inch to 10 Inch
      • 11 Inch and Above
      • Carbon Fiber Propeller
      • Triblades
      • Propeller Nuts and Accessories
    • Drone Transmitter & Receiver
    • Antennas
    • FPV Cameras
    • FPV Antennas and Trans-Receivers
    • Accessories
    • Camera Gimbal
  • E-Bike Parts
    • Ebike Kit
    • Ebike Motor and Controller
    • Ebike Battery
    • Mechanical Accessories
    • Electronics Accessories
  • 3D Printers and Parts
    • Creality 3D Printers
    • Electronics Parts
      • 3D Printer Display and Controllers
      • 3D Printer Extruder Kit
      • 3D Printer Extruder Parts and Fans
      • Stepper Motors and Accessories
      • 3D Printer Display and Controller
      • Limit Switch
    • Mechnical Parts
      • 3D Printer Heatbed and Accessories
      • 3D Printer Nozzle
      • Lead Screw and Nut
      • Linear Rail Guides
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • 3D Printer Coupling
      • Timing Belt and Pulley
      • Sleeves and Drag Chain
    • 3D Printer Filaments
      • ORANGE Premium Filaments
      • ESUN Filaments
      • Resins
  • Batteries, Chargers and Accessories
    • Custom Battery Pack
    • Lemon Premium Li-PO Battery
      • 2S Lipo (7.4V ~ 8.4V)
      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Micro LiPo Batteries
    • Lithium-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
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HomeBlogsRobots PartsRobot ControllerManual Robot ControllerHow to control robot with your phone using BLE?

How to control robot with your phone using BLE?

Manual Robot Controller, Motor driver/Controller, Motor Drivers, Robot Controller  0  comments  54 Views  Tuesday, May 23, 2023











A robot is a machine which responds to commands. These commands are programmed by the user to achieve a specific task. Robots are made by actuators, motors and sensors and

Mobile Phone Controlled Robot

A robot is a machine which responds to commands. These commands are programmed by the user to achieve a specific task. Robots are made by actuators, motors and sensors and a control system which contains a microcontroller. The robot we are going to make is a simple rover made by two DC motors which can go forward, backward, turn right or left by giving commands from a smartphone. The wireless technology we are using here is Bluetooth low energy (BLE) which comes integrated with the “seeed studio BLE sense” board. BLE consumes less power as compared to standard Bluetooth module HC-05. So lets get started with the project.

Components required

  1. Seeed studio xiao nrf52840 sense
  2. L293D motor driver
  3. Robot car chassis (with two DC motors)
  4. USB C type cable
  5. Jumper wires
  6. Battery holder of 4 cells
  7. AA batteries – 4pcs

Once we got all the necessary components along with proper robot chassis kit. Now we are ready to make the hardware connections. Connect the components according to below given circuit diagram.

circuit diagram of bluetooth controlled robot

Working of L293D motor driver

The L293D motor driver is the best option when it comes to controlling DC motors. It has integrated dual H-bridge. Using just one single driver we can control 2 motors. It has 4 outputs M1, M2, M3 and M4. One motor is connected to M1 and M2 and another is connected to M3 and M4. It also has 4 inputs to control the direction of motor IN1, IN2, IN3 and IN4. Giving HIGH to IN1 and LOW to IN2 causes the right wheel to move forward. In similar way if we reverse the order and give LOW to IN1 and HIGH to IN2 causes the right wheel to move backward. Same goes for controlling the left wheel just the inputs are IN3 and IN4.

Making the seeed studio boards compatible with Arduino IDE.

Before uploading the code we need to add the seeed studio boards compatible with Arduino IDE.

Step 1 - Copy the below given link.

https://files.seeedstudio.com/arduino/package_seeeduino_boards_index.json 

Step 2 – Open Arduino IDE >> file >> preferences

How to add seeed studio boards to arduino IDE? , step1

Step 3- Paste the link in “Additional Boards Manager URL’s”. If there are other links then you can separate the links with comma. Then click on “ok”. The boards are now added to the board manager.

Step 4-  Open “board manager” and search for keyword “seeed nrf52”. You will find two board libraries. Install both of them.

How to add seeed studio boards to arduino IDE?

Now that all seeed studio boards are added to the Arduino IDE, we can select our board and upload program to it.

Adding the ArduinoBLE library

Step 1 – Click here. The library zip folder will be downloaded

Step2 – Go to sketch >> include library >> add .zip library. Then browse to the location where the zip folder is downloaded. Open the zip folder and the library will be installed.

The “ArduinoBLE.h” library is now installed. Now we can upload the code to the “seeed studio sense board”.

Selecting the board and port before uploading.

Go to tools >> boards >> “Seeed nrf mbed enabled boards” >> select the “seeed xiao BLE sense” board.

How to add arduino BLE library in arduino IDE?

Go to tools >> port >> select the proper com port >> copy the below given code and paste it >> hit upload button.

Code

#include <ArduinoBLE.h>

BLEService ledService("19B10000-E8F2-537E-4F6C-D104768A1214"); // Bluetooth® Low Energy LED Service

// Bluetooth® Low Energy LED Switch Characteristic - custom 128-bit UUID, read and writable by central

BLEByteCharacteristic switchCharacteristic("19B10001-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite);

 

int in1 = 1;

int in2 = 2;

int in3 = 10;

int in4 = 9;

 

void setup() {

  Serial.begin(9600);

  while (!Serial);

 

  // set LED pin to output mode

pinMode(LEDR,OUTPUT);

pinMode(LEDG,OUTPUT);

pinMode(LEDB,OUTPUT);

 

digitalWrite(LEDR,HIGH); //turn off all the led's

digitalWrite(LEDG,HIGH);

digitalWrite(LEDB,HIGH);

 

  // begin initialization

  if (!BLE.begin()) {

    Serial.println("starting Bluetooth® Low Energy module failed!");

    while (1);

  }

 

  // set advertised local name and service UUID:

  BLE.setLocalName("Robubot");  // You can change this. Give any name to your bluetooth device.

  BLE.setAdvertisedService(ledService);

 

  // add the characteristic to the service

  ledService.addCharacteristic(switchCharacteristic);

 

  // add service

  BLE.addService(ledService);

 

  // set the initial value for the characeristic:

  switchCharacteristic.writeValue(0);

 

  // start advertising

  BLE.advertise();

 

  Serial.println("BLE controlled robot");

}

 

void loop() {

  // listen for Bluetooth® Low Energy peripherals to connect:

  BLEDevice central = BLE.central();

 

  // if a central is connected to peripheral:

  if (central) {

    Serial.print("Connected to central: ");

    // print the central's MAC address:

    Serial.println(central.address());

 

    // while the central is still connected to peripheral:

  while (central.connected()) {

        Serial.println(switchCharacteristic.value());

        if (switchCharacteristic.written()) {

          if (switchCharacteristic.value()==102) //forward 'f'

          {  

            Serial.println("Forward");

            digitalWrite(LEDG, LOW); // changed from HIGH to LOW    

            digitalWrite(LEDR, HIGH);

            digitalWrite(LEDB, HIGH);

 

            digitalWrite(in1,HIGH);  //left wheel forward

            digitalWrite(in2,LOW);

            digitalWrite(in3,HIGH); //right wheel forward

            digitalWrite(in4,LOW);

 

            delay(1500);

 

            digitalWrite(in1,LOW);  //stop

            digitalWrite(in2,LOW);

            digitalWrite(in3,LOW);

            digitalWrite(in4,LOW);

 

          }

           if (switchCharacteristic.value()==98) //backward

           {                              

            Serial.println(F("Backward"));

            digitalWrite(LEDR, LOW); // changed from LOW to HIGH  

            digitalWrite(LEDG, HIGH);

            digitalWrite(LEDB, HIGH);

 

            digitalWrite(in1,LOW);  //left wheel backward

            digitalWrite(in2,HIGH);

            digitalWrite(in3,LOW); //right wheel backward

            digitalWrite(in4,HIGH);

 

            delay(1500);

 

            digitalWrite(in1,LOW);  //stop

            digitalWrite(in2,LOW);

            digitalWrite(in3,LOW);

            digitalWrite(in4,LOW);

 

          }

           if (switchCharacteristic.value()==108) //left

           {                              

            Serial.println(F("left"));

            digitalWrite(LEDB, LOW); // changed from LOW to HIGH  

            digitalWrite(LEDR, HIGH);

            digitalWrite(LEDG,HIGH);  

 

            digitalWrite(in1,LOW);  //left wheel backward

            digitalWrite(in2,HIGH);

            digitalWrite(in3,HIGH); //right wheel forward

            digitalWrite(in4,LOW);

 

            delay(250);

 

            digitalWrite(in1,LOW);  //stop

            digitalWrite(in2,LOW);

            digitalWrite(in3,LOW);

            digitalWrite(in4,LOW);

 

          }

          if (switchCharacteristic.value()==114) //right

           {                              

            Serial.println(F("right"));

            digitalWrite(LEDR, LOW); // changed from LOW to HIGH

            digitalWrite(LEDG, LOW);

            digitalWrite(LEDB, HIGH);  

 

            digitalWrite(in1,HIGH);  //left wheel forward

            digitalWrite(in2,LOW);

            digitalWrite(in3,LOW); //right wheel backward

            digitalWrite(in4,HIGH);

 

            delay(250);

 

            digitalWrite(in1,LOW);  //stop

            digitalWrite(in2,LOW);

            digitalWrite(in3,LOW);

            digitalWrite(in4,LOW);

          }

           if (switchCharacteristic.value()==115) //stop

           {                              

            Serial.println(F("stop"));  

            digitalWrite(LEDR,HIGH); // changed from LOW to HIGH

            digitalWrite(LEDG,HIGH);

            digitalWrite(LEDB,HIGH);

 

            digitalWrite(in1,LOW);  //stop

            digitalWrite(in2,LOW);

            digitalWrite(in3,LOW);

            digitalWrite(in4,LOW);

          }

        }

      }

 

    // when the central disconnects, print it out:

    Serial.print(F("Disconnected from central: "));

    Serial.println(central.address());

  }

}

 

Sending commands from mobile app to Xiao BLE sense board.

After the code is uploaded, open the serial monitor. If it shows the message “BLE controlled robot” then only the board will be detected by the mobile app. So make sure that the message “BLE controlled robot” is printed or else it may not work.

Step 1 - Download the “nRF connect” app. It’s free on playstore.

Step 2 – Turn on the Bluetooth of your mobile and open the app.

Step 3 – The scanning will start and your device name will appear. In my case it’s “Robubot”. Connect to your device. After connecting the default value “0” will start printing on the serial monitor.

Step 4 – select “Unknown Service” >> Select the up arrow to write data. >> In the write value select text >> send a character ‘ f ’ for forward >>  Refresh the serial monitor. You will see 102 getting printed on the serial monitor. In similar way we get the code for ‘b’ - backward, ‘l’ – left and ‘r’ – right.

Setting up the nRF connect app with our seeed studio BLE sense.

How to send commands from nRF connect app to the BLE sense board.

We use these codes in our program. When a character is sent from the application and it’s code matches the code in “if” condition statement then commands are sent to the motor driver to move it forward, backward, left or right.

Power the board with your battery pack and disconnect the USB cable. Now you are ready to control the robot wirelessly.

Conclusion

In this way we made a smartphone controlled robot using BLE technology. The robot responds to commands given by the smartphone app. If you have any doubt regarding any part of this blog then feel free to mention it in the comments, our team will be there to assist you.

For more interesting electronic projects check out our YouTube channel.



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