This circuit is from a Radio Electronics from February 1966. The circuit is of a type that was found in many applications at the time as output from radios, televisions and other equipment.
This RIAA equalizer preamp was found in a 1990s schematic. The transistors are an old version of...
This circuit uses two LEDs to indicate the state of a battery, the voltages at which they...
The bridge diodes of this circuit, found in a 1967 publication, are according to the motor...