General Electric suggests this circuit in an 80's documentation. The circuit makes use of PUTs that are not common components today. Note the timing components that may change.
This circuit was obtained in a 1967 Raytheon manual. The company's component is an optical coupler with...
This circuit was obtained from a 90s Radio Electronics. The components used are from that time. The...
We found this configuration in a documentation for radio amateurs from 1974. The circuit can be...