This small commercial radio for the MW band with germanium transistors was found in Japanese documentation from the 1960s. The circuit is powered by a 9 V battery and has a 455 kHz IF.
This simple two transistor timer can be used to measure short time intervals. The power supply...
We found this circuit in documentation from the 90s. The circuit has a latch. The power supply must...
This circuit is from an Italian publication from 1988, but it can be assembled today because the...