Found in an Electronics World of 1966 this circuit can be made with current power transistors. It causes colored lamps to flash to the rhythm of the audio signal applied to the input.
The UAA180 integrated circuit is no longer manufactured, but if the reader finds one in a scrap...
SST OXY Flex Oxygen Sensor The purpose of this SST sensor is to measure oxygen level in enclosed...
We found this circuit in a 1965 General Electric documentation. The circuit generates synchronized...