With this circuit of a Popular Electronics from the 90's it is possible to test a diode with the oscilloscope visualizing its characteristic curve. The transformer can have currents starting from 100 mA.
This circuit was found in General Electric documentation from 1964. It makes use of a PUT, called the...
This circuit uses a diode to generate white noise for various applications. One involves the...
This circuit is a reminder for drivers who leave the headlights on and the car does not have the...