This circuit with PUT is from a 1967 General Electric manual. The relay must have voltage according to the supply.
This circuit was found in a 1981 documentation. As you can see, this is a well-designed automatic...
We found this circuit in a 1978 publication. The flip-flops are of the T type and the time...
This low-power, low-supply voltage amplifier uses a preamplifier to achieve a high-gain...