This General Electric circuit produces pulses of light only when light stops shining on the sensor. Equivalent SCRs can be used and the trigger adjustment is done in a trimpot. The maximum load is 40W.
The transmitter can be that of CB9574E. This receiver uses a PLL to directly trigger a sensitive relay....
This circuit can be used in alarms to generate a warning signal. The circuit is from a 1960s...
Author: Newton C. Braga Published:August 1, 1998 Formato:Book and e-Book Pages:...