This 1970s RCA circuit can be triggered by light or dark, depending on how the LDR is connected. The controlled load depends on the triac.
Found in a 90s 73 magazine, this circuit uses an unusual component today which is the XR2206. |...
This converter has coils according to the reception and converted frequency bands. We found it in...
It can be obtained from Mouser Electronics new transceiver modules long range (LORA) Microchip...