This is the power supply for the amplifier in the previous circuit. The voltage regulators must be equipped with a heat sink and the transformer is high current.
The voltages in an adjusted range in the trimpots are indicated by 3 LEDs. The LEDs indicate when...
This TTL delay circuit has long delay times which can be determined by R1 and C1. The base is in...
This simple unijunction circuit is from a Radio Electronics from July 1963. It can be assembled with a...