Malfunction

AIman

My BS2 decided it didn't want to work. None of the cable were altered and the power LED comes on but I still get "No Basic Stamps Found". The only change I made to the circuit was moving some resistors up a pin and after that the stamp isn't recognized. When the resistors were moved - with the power off - the LED display did come on and off momentairly.

I tried reconnecting the USB to the stamp, turned the stamp on and off several times, tried different programs, checked and rechecked connections but nothing changed the resuts.


Ideas?

latigerlilly

Dude,

I think you fried your Stamp 2 chip. If you are using the BOE, it is a very small and crowded breadboard (more like a bread crumb). Before I turn it on every time, I check and re-check to see if any of the LED leads are touching. When found, I use a tweezer to separate them. Then, and only then to I turn it on. The fact that your LED came on momentarily suggests that there was a short circuit. That's why I'm using the PDB now... much bigger breadboard (about half a slice).

Here's how you narrow down the culprit;
1. Try a different computer to hook it up to.
2. Try a different program (download the editor of the newest version off the Parallax website) - you already did this, "tried different programs".
These steps will isolate your problem as a computer hardware/software problem.

3. Try putting your BS2 on a different board.
4. Try putting anoter BS2 on your board.
These steps will isolate your problem as a BS2 problem or BOE problem.

5. Replace the component that is not working.

Try this and see,
Lilly.

AIman

I was suspecting that I may have fried the stamp - so here is more detail based on what you suggested.

1. Try a different computer to hook it up to.

·· There is a second BS2 on a different board with a different power supply, it accepts the program without any problems. So now its swap out the stamps and see what happens.

- Use a Needle nose to put in componets. Its a pliers made for electrical work with a long flat snout. Takes about the same space as a tweezers and gives a lot more controll.


·

AIman

It was the stamp.

The second stamp accepted the program on both boards but the stamp in question didn't.

Both boards ran different power sources and loaded from the same computer.