Showing posts with label Checker. Show all posts
Showing posts with label Checker. Show all posts
Friday, December 12, 2014
Transistor Checker
This simple circuit can check transistors, in the circuit, down to 40 ohms across the collector-base or base-emitter junctions. It can also check the output power transistors on amplifier circuits. Circuit operation is as follows. The 555 timer ( IC1 ) is set up as a 12hz multi vibrator.
The output on pin 3 drives the 4027 flip-flop ( IC2). This flip-flop divides the input frequency by two and delivers complementary voltage outputs to pin 15 and 14.
Subscribe to:
Posts (Atom)
