This sophisticated moving bar indicator circuit with the LM3915 is from a Radio Electronics magazine from May 1985. The two-channel circuit includes the power supply.
This 2-CK722 oscillator was found in a march 1961 Radio Electronics Magazine. The circuits need...
The two circuits we suggest are from the book Optoeletronics - Theory and Practice by Texas...
This interesting configuration of optical triggering using an oscillator was found in a 90s...