This OF-1 LO oscillator was found in a 1980s American documentation. The transistor can be any general-purpose and C1 / C2 are determined by the frequency.
This oscillator uses a ceramic resonator to determine the frequency. This kind of element is found...
Bike speedometer (CB20497E) This circuit can be powered by a solar cell. The circuit is from a...
We found this car battery status monitor circuit in an American 80s manual. The circuit has its...