Various simple electronics projects circuits diagrams for hobbyist and beginners . Simple circuits, mini projects with diagrams and description from many electronics categories.
Using this scheme can be built a very simple electronic channel selector, using very few electronic components. The channel selector allow selection of four positions and is built using integrated circuit 74hct154 some classic electronic parts.
Switches are connecting to the decoder inputs by a resistance, an LED and a transistor. Transistor is in parallel with the switch, so that clicking has no effect unless the transistor is blocked
Using this circuit diagram can be designed a very simple electronic timer which can be used for timing wiper operation, lights of the vehicle and other electronic circuits.
This heater circuit is designed using common electronic components .
When S1 is activated C1 is discharged by S1, causing voltage on C2 to grow slowly.
