week 8

Output Devices

Nov 11, 2020

For output devices assignment I chose to control an air pump, as I was planning to use it in my final project

I used the same board design from the lst weeks assignment which has a Darlington pair array (uln2003). the darlington pair array functions as a switch for the pump.

I had designed the board with plans to connect the airpump between ground pin and output pin from ULN2003 but while testing I realised that I had made a mistake in the connection and that the air pump needs to be connected to output pin from ULN2003 and VCC pin so that when the output from the microcontroller is high the output pin from ULN2003 connects to ground pin.