This circuit was found in a 90s Electronic Design. The circuit was designed to be powered by a 4 - 20 mA line.
This relay driver or shield was found in a 1960 Sylvania transistor manual. The circuit is for...
This circuit is from an 80's documentation. The circuit makes use of a component of the era, the...
This modulated siren has frequency adjustment and modulation in the trimpots. For 220V use 1N4007 as...