This sensitive Japanese mid-wave receiver from the 1960s has an output power of 45 mW and is powered by 3 batteries (4.5 V). The circuit is superheterodyne with an IF of 455 kHz.
This circuit is from American documentation from the 70s. This configuration appears in this...
A binary counter until 2" or a divide-by-the same value can be built by cascading n 4013...
This circuit trips when the input voltage exceeds 30 V. Its base is a DIAC and it can be used to...