Robosix
4WD Robot Car Chassis Kit with BO Motors and Wheels
Two-layer acrylic 4WD platform with 4 BO motors, 4 wheels, clamps and battery holder - build a robot in one lab period.
₹779
₹969
incl. GST
Robosix
LM393 Speed Sensor Module with 20-Slot Encoder Disc
SKU RS-ENC-LM393
IR slot sensor and encoder disc that count wheel rotations, so your robot can drive a measured distance and go straight.
₹69
₹99
30% off
₹58.47 + 18% GST (₹10.53) · Tax included · You save ₹30
In stock
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About this product
Without an encoder, a robot only knows what you told the motors to do, not what they actually did. This module fixes that. The 20-slot disc mounts on the free end of a BO motor shaft and spins through the IR slot sensor, which sends one clean digital pulse per slot to your microcontroller.
Count those pulses and you can measure wheel speed, hold two motors at matching RPM so the robot drives straight instead of curving, or make it travel an exact 50 centimetres and stop. It is also the standard starting point for teaching PID control and for tachometer, RPM meter and simple odometry projects.
The board runs on 3.3 V or 5 V and works with Arduino, ESP32, NodeMCU and Raspberry Pi. Use an interrupt pin so no pulses are missed at high speed. Buy two for a differential drive robot.
Specifications
| Sensor | LM393 comparator with IR slot photo-interrupter |
|---|---|
| Operating voltage | 3.3 V - 5 V DC |
| Output | Digital pulse train, one pulse per slot |
| Slot width | 5 mm |
| Encoder disc | 20 slots, fits BO motor shaft |
| Pack contents | 1 sensor module, 1 encoder disc |
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