Found in an old Popular Electronics, this circuit warns when a remote lighting system is not working. The circuit uses an LDR as a sensor and the components used are quite common today.
This circuit can modulate a laser rate at frequencies of 50 kHz. We found the old documentation. The bipolar...
To divide by an odd number‘ means not only the need for flip-flops, but some additional logic too. The...
The battery charger suggested in the figure has its current limited by resistor R1. This component may...