This 1 kHz circuit was found in American documentation from the 90s. The original operational amplifier consists of a double 741 at the time. The power supply must be symmetrical.
In the figure we have the simple way to use a low current switch or sensor to drive a high power...
This circuit is from a 1992 PE Hobbyst Handbook. The circuit fires an old electronic flash using an...
This new Texas Instruments component consists of an inductive proximity detector that can be used...