This circuit was found in a Hands On Electronics from the 90s. It is intended to supply old tape players to batteries with a voltage of 7.5 V from the 12 V of a car battery or source.
This circuit was found in the August 1993 Electronics Now magazine. It is for telephones used on...
This circuit was obtained from a 1978 Practical Wireless. It generates a low frequency, low...
The AC125 transistor is an ancient germanium type widely used in audio stages as a preamplifier. In the...