We will need:
switch (they should have 3 legs, and the switch should have 3 positions).
switch (key type, optional).
4 blue LED and 5 red ones.
4 red LED .
11 resistors 750 Ohm.
Wires.
Heat shrink tubing or super glue.
Soldering iron and accessories.
Face plug.
3 power supply splitters.
![](https://i.washerhouse.com/_nw/2/25646357.jpg)
![](https://i.washerhouse.com/_nw/2/31418794.jpg)
Characteristics LEDs:
Voltage = 1.5 V, Current = 0.015 A.
From here we calculate the required resistance for incoming 12 V:
R = (12 V - 1.5 V) / 0.015 A = 700 Ohm
or the closest value that can be achieved, 750 ohms
Let's start, let's take the front plug....
![](https://i.washerhouse.com/_nw/2/15348399.jpg)
.... and drill holes in it for switches and LEDs.
![](https://i.washerhouse.com/_nw/2/13883290.jpg)
And we screw all this stuff into a plug.
![](https://i.washerhouse.com/_nw/2/42393630.jpg)
Now we turn all this stuff over to the other side, it’s better to tighten the plug in a vice, otherwise it will crawl across the table during soldering.
![](https://i.washerhouse.com/_nw/2/63685918.jpg)
We solder everything approximately according to this scheme, or as you need.
![](https://i.washerhouse.com/_nw/2/05823800.jpg)
Eventually:
![](https://i.washerhouse.com/_nw/2/77856788.jpg)
We check the operation - when the switch is removed from the neutral position, one LED should light up.
![](https://i.washerhouse.com/_nw/2/58540580.jpg)
![](https://i.washerhouse.com/_nw/2/82059278.jpg)
We build it into the body.And we manage what we want :-))
![](https://i.washerhouse.com/_nw/2/85638576.jpg)
Second option: You can get by with one row of LEDs and switches without a neutral position:
![](https://i.washerhouse.com/_nw/2/52096456.jpg)
Here's the diagram:
Job:
![](https://i.washerhouse.com/_nw/2/64414060.jpg)
All !