This commercial transistor tester circuit (EICO 666) is from a Japanese publication from the 1960s. The switch selects the types of test with the switching of the terminals and the gain ranges.
This circuit was found in an Electronic Design from the 90s. The oscillator circuit consists of a...
This circuit with several outputs was found in old American documentation. It can be applied to...
This simple circuit can be found in different versions on this website. The capacitor and resistor...