In SX Microcontrollers, SX/B Compiler and SX-Key Tool, capdiamont wrote:

Well, this is my 2nd sx project.  The project is another cat door one. I had built the h bridge, then did some programming, then added a load to the motor, when I noticed the lack of pep. It uses rb.0 and rb.1 for control. I have this odd problem with it not being able to program when the, motor and driver is connected, but don't want to cover that yet, until I get the driver circuit fixed. I think it maybe due to the resistors on the output pins being too low. Thus, the 1 k pins might fix that. I can't wait for the USB key. 

I'm trying to keep things modular, debug them, then move on. It should help to figure out where I went wrong. This is my 1st h bridge circuit. 

One question about the H bridge circuit. Why isn't the current needed to drive the drive/main transistors times two, since you are driving two transistors from the initial transistor?

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