This circuit is from a 1968 publication. Here we have several types of resistive sensors with individual adjustments triggering a single SCR. Power depends on the type of sound device to be triggered.
This circuit decodes signals received in SSB (Single Side Band) obtaining an audio signal for...
This circuit was found in RCA documentation from the 1980s. The circuit uses LDRs of the time and...
Mouser Electronics is now offering a reference design board from ST Microelectronics STEVAL-WESU1...