Found in a 303 Circuits from the 90s, this circuit converts signals from the 10 kHz to 150 kHz band to the 4.01 to 4.15 MHz band.
This circuit was found in a Popular Electronics from the 80s. It is possible to control a relay...
This circuit is from a factory documentation (National Semiconductor) of the 80's. The power...
This circuit indicates when a 28 V lamp burns, lighting a neon lamp with higher voltage. The...