This circuit is an alternative to the previous circuit. We found it in the same article in the Radio Electronics magazine of March 1992. The integrated circuits are the LM3914.
We found this game for two competitors in a Popular Electronics from the 80's. The circuit can be...
We found this simple alarm circuit in a 1981 documentation. As we can see, it is a car alarm...
This circuit has appeared in several versions in this section and on our website. The transistors can be...