This circuit is from a 1968 Texas Instruments documentation. The components are from the time and the sensor photodiode is difficult to obtain today. The circuit has a response from 10 Hz to 20 kHz.
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...