This is a commercial circuit from the year 1958. Transistors are germanium types and transformers and coils are hard to fild today. The circuit is destinated to the reception of medium wave stations.
This tester from a 1960 magazine is only for capacitors with insulation voltages above 200 V (110...
This circuit triggers at the touch of the sensor, passing its output from high to low level for a...
This circuit can be used to add a delay to a logic signal as shown by the input and output...