This circuit for photography uses was found in the Electronics Experimenter Handbook Special projects magazine from 1983. The bargraph circuit powers 8 LEDs.
The resistor values depend on the desired gain and the full scale of the indicator instrument. The power...
This low frequency oscillator with an operational amplifier of type 741 has adjustment of the mark...
This 3 + 3 V symmetrical source circuit uses an old operational amplifier. The circuit is from an...