This old configuration of an audio amplifier has a push-pull two-transistor output stage. Output power is low and the critical components are the transformers. The circuit was found in an 1958’s publication.
This small FM transmitter can be powered by solar cells in the range of 1.2 V to 6 V. Its range...
Found in a Hands On Electronics of the 80s, this circuit makes use of an integrated circuit of the time...
When the input voltage exceeds the value set in R4, the LED lights up, indicating this. The...