Well I am frustrated. I thought had "THE" solution for driving my DC drive gear motors, but it appears that PWM from one device is not the same as PWM from another. crap! ( or --- I am not asking the right questions / lack of understanding, etc ... ) I thought I had the perfect H-bridge device that I could control from either a Acroname Moto 1.0 module or Servo Controller module until I discovered (if I am interpreting the technical advice correctly) that I can't get the speed control granularity I want that way --- it sounds like I can only get near full speed that way.
Here are my specs:
The brains of the robot will be a mini-PC board (ITA, etc.) It will need to control a servo controller (like Parallax, Lynxmotion, etc. for arms/grippers/camera pan/tilt) It will need to control 2 reversable DC gear motors for differential drive and steering
I want as few external boards as possible, for power consumption, weight, etc. In other words, if I could get the servo controller to also send signals to the motor speed controller that would great!
Motor controller must be affordable (between $25 to $80 to control2 motors; $100 MAX !!! )
connects to mini-PC board via serial port or USB gets commands from PC to set speed & direction & stopping OR will receive PWM signals from a PC-based servo controller one channel will connect to one 6-12VDC gear motor, reversable
Entire system will run on 12VDC, max. I *could* go to 24VDC if need be, but I really don't want to for obvious reasons.
Any suggestions ? Thanks ! JCD