This circuit with two operating modes was found in the September 1989 issue of Radio Electronics magazine. Other operational amplifiers can be used. The power supply must be dual.
This useful circuit is used to test the insulation of cables, appliances, leaks in high voltage...
This vibrato circuit was found in Motorola's 1966 documentation. The circuit uses transistors of the...
This circuit for analog TV was found in an American documentation from the 90s. The circuit uses an...