This circuit for analog TV was found in a 90s EDN. The integrated circuits used are from that time and may present some difficulty in obtaining.
This circuit sends signals to a shortwave radio (range 3 to 7 MHz) at a distance of a few tens of...
When the voltage in the circuit exceeds the value set in the trimpot, the LED goes off and, if a...
This circuit was found in an Elektor from the 90s. Next to the circuit we have a table with the...