This circuit was obtained in a Hobbyst Handbook from 1990. The circuit can be easily assembled since the SCR can be a TIC106 and the transistor a 2N30555.
This alarm circuit was found in a 2004 documentation. The circuit searches for open NC sensors....
This circuit was found in Motorola's 1967 documentation. The circuit makes use of power...
This circuit was obtained in a Hobbyst Handbook from 1990. The circuit can be easily assembled...