This small regulated power supply was found in a 1963 General Electric documentation. The special zener diode transistor can be replaced with an equivalent discrete configuration.
This PLL with operational amplifiers was found in 1969 documentation. The configuration can be...
Found in an old American documentation this FM modulator makes use of a varactor diode. The...
Here we have the way to activate two common cathode displays with 4026 integrated circuits. The...