Found in a 1966 General Electric documentation, this circuit controls an incandescent lamp from an audio signal. The circuit works like a rhythmic light.
The integrated circuit used in this 1987 project is not very common these days. However, if found...
We find this circuit in a Popular Electronics of the 90s. The circuit is passive and the coils...
Small variations in the resistance of the subject's skin holding the test leads are detected by...