This circuit is from a Popular Electronics from the 90s, consisting of a repeater relay for remote control of TV, which today can be done by Wi-Fi or other simpler resources.
With this regulator we can have currents of up to 4 amps with 5V at the output. The transistor can be...
This circuit is used to turn on the headlights when it gets dark. The circuit is from an...
This digital mixer uses CMOS integrated circuits. The circuit was published by us in a magazine...