This circuit was suggested by Signetics in 1980s documentation. The circuit makes use of the hard-to-obtain component of our day. It is for reference only.
This circuit was found in a 1966 General Electric book. The triac and the day are from that time...
The presented circuit uses the National Semiconductor's LM3909, an oscillator that operates with...
The circuit shown in figure is suggested by Texas Instruments (www.ti.com) and makes use of the...