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.
Any operational amplifier can be used in this circuit. The 741 is the most common. Power supply must...
This circuit was found in the February 1993 Radio Electronics magazine. The frequency depends on...
This circuit was found in an article about the 555 in the November 1992 Radio Electronics...