This circuit was found in a Radio Electronics magazine from November 1972. The circuit is based on an integrated circuit of the time and the current is 1 A and is adjusted with a potentiometer.
This circuit uses two Raytheon RC4558 operational amplifiers that are similar to the 741. The...
This small stereo amplifier for headphones was found in a documentation on integrated circuits from...
This is a MOSFET version of a grid dip meter for frequencies between 1.8 MHz and 150 MHz,...