This power supply is based on the 723 integrated circuit, which is no longer very common today. The transistor must have a heatsink and the bridge can be formed by diodes 1N4002 or equivalent.
Random pulses are produced by this multiple oscillator using unijuncion Transistors. The...
This watch was found in 2001 documentation. The watch is powered by 4 batteries. To save energy, the...
This circuit with the PA7601 was found in a 1967 Philco-Ford documentation. The circuit has a pass...