We found this frequency meter circuit in a 1974 documentation. The circuit is powered by 12 V and has 8 digits. Changes can be made using a prescaler to reach higher frequencies.
September 2016 - Mouser Electgronics already has in stock the new moisture digital sensor HDC1010...
This is the receiver for the CB17133E. Its main feature is that it uses only transistors. The...
Using a standard multimeter, this circuit from a 73 magazine for radio amateurs provides an output...