The Boss DD-20 is a very complete delay with lots of cool features, including an external foot controller jack. I needed to expand the functionality to allow activating the first footswitch remotely (I keep my DD20 on the desk), so I did it by connecting two wires to the switch I wanted to activate remotely and hooking up a relay that would make the contact, soldered the wires to the previously desoldered PCB mounted jack.

The intention of this photo essay is only to show that hardware can be customized if needed, it doesn't show how exactly I did it, I didn't keep track of it, I just added the relay with some diode and cap for protection/filtering, and that was it. It's meant more for inspiring mods, needless to say it will void the product's warranty and I'm not responsible for any consecuence that seeing this picture has in your life.

The picture shows:
1. Some tape I used to temporarily hold the desoldered jack while soldering. I didn't feel the need to remove it afterwards so it stayed.
2. Jack positioned so that the contacts are free to solder wires.
3. This wire completes the circuit for the relay (via the remote footswitch)
4. Aditional DC jack that I added for daisy chaining more pedals.
5. Original DC jack with wires soldered to get power for the relay.
6. Relay.
7. Capacitor and resistor for protection/filtering.
8. These two wires are soldered to the switch that's going to be operated remotely.
9. This jack now accepts a stereo plug with two control paths for 2 different purposes, one is the standard tap tempo included in the DD-20. The other is the remote activation of the panel switch.