This commercial receiver from the year 1958 uses two AA cells as Power supply. The circuit is intend to receive MW station and the transistors are germanium types not easy to find today.
Figure bellow shows how n flip-flops can be associated to perform a shift register. Data is...
This simple digital frequency meter using CMOS circuits reaches 5 MHz frequency. Input signals are...
This circuit was originally recommended to operate with the emitter of the previous circuit but...