Wien Bridge Oscillator with NTC Regulator (CB25909E)

We found this sine wave oscillator in the December 1995 issue of Electronics Now. The circuit uses a 741 and is powered by a dual supply.

Delayed Alarm Trigger (CB4775E)
This circuit is designed to activate an automotive alarm after 8 minutes of activation. Of course...
Reinartz Oscillator (CB25318E)
The coils determine the frequency of this oscillator that we found in the January 1996 issue of...
Simple Timer Using the 555 (MSB123E)
This simple timer can be used in many applications such as egg timer. The LED glows up when S1 is...