Audio Cable Tester (CB3827E)

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

TPA3244 Class D Amplifiers Ultra HD
March 2017 - The new Texas Instruments TPA3244 class D amplifiers with power ratings from 60 to...
1 kHz Astable Using the 4070 (CB252E)
This circuit produces 1 kHz square signals using the CMOS IC 4070. The frequency is given by the...
Call to phone (CB3967E)
This circuit is a documentation of the 70's and therefore valid for analog lines. What the circuit...