This sophisticated repellent uses a double 555. We find it in an American documentation from the 80's. The circuit can be powered by batteries or source included in the diagram.
With this circuit it is possible to measure RF signals with a common multimeter. Signals up to 200...
We found this circuit in the 1982 SGS Linear Integrated Circuits manual. The integrated circuit used...
We found this circuit in an old neon lamp application manual. The circuit stores a call. The...