In the figure we have the way to implement a logic gate or (OR) with an LM393. The circuit must be powered by a symmetrical source and other operational ones can be used.
This circuit produces pulses of 90 V at intervals that can reach 5 minutes. The circuit is from a...
This circuit is from an 80's documentation. Equivalent transistors can be used. The circuit is...
Found in a 90s Popular Electronics, this circuit is interspersed between the filter and the...