Found in 1967 documentation, this circuit makes use of period transistors and drives a common light bulb. Nothing against it being adapted to use LED.
aaa The circuit shown generates 100 kHz signals for calibrating the scale of a receiver in 100 to...
Found in a 1964 magazine, this is a small headphone amplifier from 500 ohms to 10 k ohms (magnetic...
This circuit can use common operational amplifiers according to the supply voltage. One suggestion...