Product Documentation

Jumper Selection
I2C mode with no jumpers installed, up to 100 khz clock.
Serial mode at 9600 bps, 1 start bit, 2 stop bits, no parity
Serial mode at 19200 bps, 1 start bit, 2 stop bits, no parity
Serial mode at 38400 bps, 1 start bit, 2 stop bits, no parity
Motor Voltage
The MD25 is designed to work with a 12v battery. In practical terms, this means the 9v-14v swing of a
flat/charging 12v battery is fine. Much below 9v and the under-voltage protection will prevent any drive
to the motors.
Motor Noise Suppression
When using our EMG30 encoded motors, you will find that a 10n noise suppression capacitor has already
been fitted. Other motors may require suppression. This is easily achieved by the addition of a 10n
snubbing capacitor across the motors. The capacitor should also be capable of handling a voltage of twice
the drive voltage to the motor.
Leds
The Red Power Led indicates power is applied to the module.
A Green Led indicates communication activity with the MD25. In I2C mode the green led will also
initially flash the address it has been set to. See I2C documentation for further details.