We found this configuration in a 70s American documentation. The circuit makes use of operational amplifiers of the time. Modern equivalents can be tested.
This circuit was obtained from the Texas Instruments component datasheet which can supply currents of...
The circuit shown is a white noise generator using a zener diode as a source of noise. The...
We found this touch switch in a 1992 Electronics Handbook. The circuit can be assembled with 6 or...