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.
In the figure we have a modified multiplier circuit that can operate with the sextuplicator with...
This amplifier with an OTA has a gain of 40 dB. The power supply must be symmetrical. Found in...
This circuit uses a diode as a sensor, activating a relay when a certain temperature is reached. The...