PWM Motor Driver with H-Bridge

Description:

This DC Motor driver for pulse wide modulation is designed for engines with a maximal power consumption of 200 watts. It works with a so called H -Bridge. It has three input pins, two for the direction and one for the pwm-signal. The inputs are designed for logic level signals ecpecially for microcontroller outputs. The DC motor has to be plugged at the two output pins. There are two seperate Pins for the supply voltage.

Table for the input signals:

01	02	direction
high	low	left*
low	high	right*
high	high	stop
low	low	stop

*maybe the direction is inverse, depends on how you connected the motor.

PWM Parameters:

high = 100%

low = 0%

Features:

Logic Level Input Voltage (TTL)
High Power; more than 200 watts with bigger cooling element for the CMOS transistor
One side layout

PWM Motor Driver

Schematic

PWM Motor Driver Schematic

Layout

PWM Motor Driver Layout

Note: Since i got a couple of mails i recommend to read this first:
This device is a result from a former highschool project and maybe there are a lot of better ways to construct a device like this. If you don't need to supply a very powerful motor i recommend you to use an integrated circuit like the L293. But this device simply looks mighty and is really robust so just build it and be happy with a simple rock-solid design.

kroell.it