This circuit was found in Delco documentation from 1965. The transistor is of the time, but any current power PNP with at least 500 mA collector current and 100 V collector voltage can be used.
This circuit was found in a Hands On Electronics from the 90s. The microphone is a small 75-ohm...
ON Semiconductor MC74VHX1Gx Logic ICs The Mouser Electronics series 74 Logic ICs are available for...
Settings like to this can be found elsewhere in this section. This was found in an American...