This circuit was originally intended for reading movie soundtracks. The circuit is from 1967 and was found in an English publication. The sensor is semiconductor type.
This switch is bounce free and is recommended for the control of CMOS circuits. The switch must be...
This interesting shield circuit was obtained from a Poptronics of February 2001. The American...
This circuit with the LM741 operational amplifier can be applied to other operational amplifiers. We...