We found this circuit in the magazine Eletcronics Now of July 1994. The power supply is according to the relay and the transistor can be any general purpose one.
This circuit can be used to activate the lamp when it gets dark. We found the circuit in old...
Based on a unijunction transistor, this circuit was found in the January 1994 issue of Electronics Now...
Mouser Electronics already has in stock the new RF transceivers Atmel / Microchip ATA8820 SIGFOX ™ for...