This circuit shows how to make an adaptation on an AM receiver to receive CW and SSB signals. The circuit is from an 80's documentation. The diode is commonly used.
We found this circuit in a 2002 documentation. It allows you to turn off the devices connected to a set of...
This circuit for the experimenter of the 60s allowed testing the most common transistors in the...
This circuit triggers a relay when the light that falls on the LDR is cut off. The sensitivity is adjusted...