JeeLabs DC Motor Plug jcw
A small board containing two H-bridges to drive small DC motors or a stepper
jeelabs.net/projects/hardware/wiki/DC_Motor_PlugDescription
The board uses an I2C I/O expander to support the two motor drivers as well as 4 freely available I/O pins.
The motor drivers are based on the TC4424 chip, which is mainly intended for driving MOSFET chips, but which happens to also work well to drive small motors forward or backward. Motors with stall currents up to about 1.5A @ 4.5..18V should work just fine.
An I2C bus running at 3.3V is used for I/O, with all the power and signal lines brought out to to both sides of the board to allow daisy-chaining with other I2C-conformant boards.
Schematic
Board
Bill of Materials
| Designator | Value | Description |
|---|---|---|
| C1 | 0.1µ | Capacitor |
| C2 | 1µ | Capacitor |
| C3 | 1µ | Capacitor |
| IC1 | TC4424A | DUAL LOW SIDE DRIVER |
| IC2 | MCP23008T | I2C-Bus Remote 8-bit I/O expander |
| IC3 | TC4424A | DUAL LOW SIDE DRIVER |
| PORT1 | JEEPORT | PIN HEADER |
| PORT2 | JEEPORT | PIN HEADER |
| SJ1 | Solder Jumper | |
| SV1 | PIN HEADER |
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This project is © Jean-Claude Wippler, and is published under the terms of the Creative Commons Attribution 3.0 Unported licence.