Found in a 90s Radio Electronics, this circuit uses an AD590 or AD592 for remote temperature transmission. The circuit produces a voltage of 1 mV for each degree centigrade.
We found this circuit in a 1986 documentation. It causes 40 LEDs to flash sequentially. The big...
Exciting a sequential circuit with the output of a stereo we can make a set of lamps run at a...
This alarm from an old 1978 publication uses PNP transistors and driver and output transformers that are...