This circuit was found in an English publication from the 70s, an article that teaches how to calculate instruments. The circuit is still current and can be built with an analog indicator of 100 uA.
We found this simple IF circuit in a book from the 50's. The transistor is made of germanium and...
This circuit uses two transistors, the low noise BC549. Its quality is very good and it has a...
September 2016 - Mouser Electgronics already has in stock the new moisture digital sensor HDC1010...