This balance indicator for stereo amplifiers was found in an 80's Elektor. The components used are common. Zeners are 1.8 V or close to that value.
This sensitive AM radio doesn’t need external antenna, picking easily local stations. The output...
This small FM transmitter circuit, using only common transistors, includes a mixer that allows it to be...
This circuit is from an old RCA MOSFET manual from the 70s. The circuit can be implemented with...