I finally have some cool amps that fit my sounds needs, and I wanted to be able to use a couple of them together. So i started looking at a/b/y pedals. They are kinda pricey considering there isn't a whole lot to them. I was already ordering some foot switches for other projects so i thought i'd just build one myself.
i already had wire, and leds. So i used the attached diagram.
If you have some higher quality cat v or cat 6 Ethernet cable and wire of the conductors is braided, or stands you can use it to make the small jumpers for the switches. Solid conductor wire will work but doesn't have the same throughput and is more prone to breaks.
One of the things about using leds is you need to figure out what sort of resistance you need to take the 9 volt power supply down to the right voltage. I used these two websites to help me figure out I needed.
LED Resistor Calculator
LED calculator for single LEDs
the pedal is fairly easy and you can build it in an afternoon if you have everything on hand. The only thing that i might do different is change the location of my LED indicator lights. i put them a little too close to the actual switches as opposed to closer to the a and b output jacks.
the pedal does allow for an A/B amp setup but you could also use it as a cheap d/i box, splitting your pedal board/pedals, and i am sure there are other uses.
all that i have left is picking up a stencil or some stick on letters so i can label everything.