cinq wrote:That one was really confusing.
Sorry about that - didn't mean for it to be confusing.
Part of my comments are driven because I'm more paranoid than most.
cinq wrote:Can much do these switches cost?
I have no idea if they're even available or what they cost.
cinq wrote:In what case do i need them?
If the existing circuit is incapable of supporting the power necessary to light the LED's but there is more than one way to skin a cat or to make the LED's light up.
cinq wrote: sanwa arcade buttons are double pole buttons?
No idea... but if I had to guess they're:
SPST NO Momentary
Single Pole Single Throw Normally Open Momentary switches.
cinq wrote:How can i test my circuit to see if the leds will light up?
Start by measuring the voltage - and then with proper polarity see if you can get an LED to light up. You'll need to use a fairly low wattage LED though because current is limited. You want to make sure if you hit all the buttons at once you don't cook anything.
If you're using the USB port only to power this circuit then you'll need to keep the total current for the entire device to under 500mA (1/2 Amp) - but it's hard to tell how much it's already drawing. For that you'd have to hack a USB cable and measure the current.
There are LOTS of ways to get what you want and in all honesty, I think I got into the weeds and I shouldn't have.
Start by making the buttons work.
Then worry about the LED's.