A diode is nothing more than a one way street or a check value. It will only allow current to travel/flow in one direction and that is against the arrow. With a high resistance scale selected on the multimeter, the front to back ratio on a good diode will be 10 to 1. That means you will get a high reading and a low or close to short in the other direction. Some meters have a position to check diodes. BUT you may have to lift one side so as to not see the resistance of the adjacent components.Hope this helps. Garry East TN
At 06:23 PM 11/6/2005, Christopher Zach wrote:
Ok, oddness. E20, reverse runs fine, forward runs in one speed only. And that speed is using the resistors; they're getting warm. Any guesses? I'm betting card 4 diode failed. How can you check a diode? Chris _______________________________________________ Elec-trak mailing list Elec-trak cosmos phy tufts edu https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak