This circuit is from 1980s documentation. The maximum operating frequency is 3.5 MHz. The current of the LED can be from 0 to 100 mA. The integrated circuits used are from that time.
This circuit causes an instrument needle to oscillate to signal an event. The circuit is powered by...
This bridge circuit for the bench can have several uses. We found it in Radio Electronics magazine...
July 2017 - The new Diodes Incorporated AP7350 LDOs with ultra low quiescent current can be...