Found in an Electronics World of 1969, this circuit causes a light bulb to flash along with the audio signal applied to the input. The circuit only works with incandescent lamps. C can be 47 nF to 220 nF.
This amplifier in common mode was obtained in an Electronic Design from the 90's. The circuit is...
This low noise, low frequency instrumentation circuit was found in a 1976 NASA circuit manual. The...
When the sensor receives light, the relay closes its contacts and remains so even after the light...