Board 2 Just about done
October 2nd, 2008
After finding out the power supply was not regulating properly. The voltage dropped to 4.8 Volts if I had more than 12 LED’s lit. So I re-wrote the code to prevent that from happening. With no LED’s lit the board puts out ~8.05mA With one LED lit the board puts out ~29.2mA. I’m probably going to change the current limiting resistor on the on 6276 to 1.5K. That should drop the Current Draw from the LED’s to around 15mA.
I hooked both boards up to test and one of the LED’s on the first board has blown. With both boards running the power supply had trouble regulating. Proof positive of two things. I have to raise the current limiting resistor on the drivers and I need to get a better power supply before board three gets wired in.