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 flasher circuit was found in Radio Electronics from the 90s. The circuit must be powered by a...
This circuit has a sensitivity of 2uW. We found it in documentation from the 1980s. The integrated...
Found in Popular Electronics from the 90s, this circuit reaches a few tens of megahertz. L1, C1...