cooltrain
18-08-2003, 11:55 AM
I managed to assemble a microprocessor controller simulator on a piece of board. The simulator contains the mother board, EEV board, potentiometers for pressure and temperature analog inputs, switches for digital inputs and LED's for the digital outputs.
This simulator will be used by our tech's to simulate different conditions and observe the responces. Familiarizing the controller can enhance their operation, service and trouble shooting skills on this particular controller which is currently used for rooftop package and aircooled-screw/recip chillers.
Unfortunately, the resistors that drops the 220vac to the LED's are overheating.
The resistors are 22k ohms and 1 watt.
Any suggestion for a correction helps a lot. I ain't electronics, just trying hard and no buddy nearby. No reference to browse too.:confused:
This simulator will be used by our tech's to simulate different conditions and observe the responces. Familiarizing the controller can enhance their operation, service and trouble shooting skills on this particular controller which is currently used for rooftop package and aircooled-screw/recip chillers.
Unfortunately, the resistors that drops the 220vac to the LED's are overheating.
The resistors are 22k ohms and 1 watt.
Any suggestion for a correction helps a lot. I ain't electronics, just trying hard and no buddy nearby. No reference to browse too.:confused: