Based on a unijunction transistor, this circuit was found in the January 1994 issue of Electronics Now magazine. The frequency range depends on C1, which can be changed.
May 2017 - In stock at Mouser Electronics DGD Dgate drivers from Diodes Incorptrated ara...
This circuit is from the 1977 RCA Linear Integrated Circuits Manual. The circuit has a...
The sensor is S1 in this alarm that we found in a Radio Electronics magazine from May 1971....