Control Panel for PC


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.

 

Characteristics LEDs
Voltage = 1.5 V, Current = 0.015 A.

From here we calculate the required resistance for incoming 12 V:

Resistance = (Main voltage - Voltage LED) / Current LED, i.e.:
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....



.... and drill holes in it for switches and LEDs.


And we screw all this stuff into a plug.


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.


We solder everything approximately according to this scheme, or as you need.


Eventually:


We check the operation - when the switch is removed from the neutral position, one LED should light up.



We build it into the body.And we manage what we want :-))


Second option: You can get by with one row of LEDs and switches without a neutral position:


Here's the diagram:


Job:


All !

come back
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Comments (7)
  1. Tyger
    #1 Tyger Guests 1 June 2011 19:09
    0
    what did you control using this scheme? wink
  2. feelloff
    #2 feelloff Guests 1 June 2011 19:15
    0
    Fans.
  3. Gagafa
    #3 Gagafa Guests 26 October 2011 18:46
    0
    and where can I buy all this? in full?
  4. Veent
    #4 Veent Guests 26 October 2011 19:23
    0
    In the grocery store, where do we still sell radio electronics?
  5. a lion
    #5 a lion Guests 7 May 2014 15:15
    0
    Why do we need resistors with such high resistance? The power supply is from the molex output, and there is only 12 volts maximum...
  6. Flynn
    #6 Flynn Guests 12 December 2014 15:41
    1
    Hello. Help me please. I have this idea. I have three simple toggle switches without a neutral position (just On\OFF) 2 legs. How do I connect them? Here are the first two toggle switches for the original computer power button. And the third toggle switch is to the reset button. I'm not going to install light bulbs and additional buttons. ONLY THREE TUMBLE SWITCHES. I was told that resistors are not needed in this case. and verbally explained that the toggle switch should be connected directly to the wires of the buttons. I'm still learning, please someone explain it to me more clearly and with a diagram.Thank you all in advance.
  7. Sasha
    #7 Sasha Guests April 6, 2020 05:36
    1
    why is this needed? Doesn't it just work to turn on the computer?