Audio Cable Tester (CB3827E)

This simple circuit tests both monophonic and other two-wire audio cables. The circuit is powered by two common batteries.

Circuit for Inductors Test (MSB071E)
This circuit is used to test an inductor (coil) allowing the observation of its opration in an R-L...
CMOS Mixer (CB922E)
This digital mixer uses CMOS integrated circuits. The circuit was published by us in a magazine...
Pre Amplifier For Crystal Microphone With 741 (CB924E)
The configuration of this circuit was suggested by an old English publication that comes to...