My goal is to make a car turn signal flasher. I used a 555 chip as the timer with the output driving a TIP122 transistor at BASE and a 100 ohm resistor between the BASE and the 555 output pin 3. The ...
I'm trying to design a circuit that will drive a relay (and thus turn on a bigger circuit) when the correct "key" circuit is connected. The "key" is contained within the hashed box and functions as I ...
I had the opportunity to analyze a very interesting circuit today using a programmable unijunction transistor as a timer. The power supply varies, and the circuit must operate on under 10uA of ...