N00b Question: using a backwards 3PDT daughterboard

[jcpst]

I’m out of footswitches for a few days while I wait for a delivery.

So I dug in my box of fuckups and pulled out this dude:



From one of my first builds. Whoops .

Can I still use this by just flipping which in/out jacks my wires go to?

 

[Coach_McGuirk]

I’m out of footswitches for a few days while I wait for a delivery.

So I dug in my box of fuckups and pulled out this dude:

View attachment 73986

From one of my first builds. Whoops .

Can I still use this by just flipping which in/out jacks my wires go to?

No, I had this same question at one point too. The ground and onboard/offboard wires aren't routed symmetrically so they don't work correctly when the board backwards. There's a reason why it says that side down.

 

[DailyDovetails]

Hmm I actually think it might work if you went
Switch-board
Input-output
Board in-board out
Ground-ground
Switch-switch
Board out-board in
Out-in
I think the circuit output would be grounded on bypass instead of input. Also the wires will be a criss crossed mess.

 

[jcpst]

Yep, I figure if there’s a way it might be a mess, but I’d rather have a mess than burning up that LMS soft-click trying to remove the board.

 

[Coach_McGuirk]

I've removed backwards boards before. It's not that hard so long as the pins are quite a bit smaller than the pads, which in is likely the case, given how much clearance there is with most 3PDT. Just hit a few at a time if you're worried about the heat. And use good wick.

 

[music6000]

I did it once as an experiment, the switch being more important than the breakout board.
I carefully cut the Breakout board across the top with a hacksaw so I had 9 individual pieces & removed them one at a time!!!
So, 2 cuts in each direction between pads!

 

[Feral Feline]

IIRC, what the 3PDT-daughterboard is doing is this:



Note how lug 1 is jumpered to lug 6, this grounds the effect's input during bypass, lowering noise/chance of bleed-through.


Here it is flipped:



Ignoring the backwards PCB, if the PCB were right-way round, and you wire the boards up as though the daughterboard were a mere mirror image, the output from the board (Lug-7) is now sending the signal to ground in bypass.


Rather than desoldering/cutting/junking anything...

Potentially it could still work, but the wires from the PCB to the 3PDT-daughterboard will NOT be in the correct order, and much DMM-sleuthing will be required to figure out which wire goes where and massive increases in chances that it will require trouble-shooting...



Here's what I propose you try:

 

[KR Sound]

That’ll work

 

[zgrav]

the drawing is a solid way to explain the orientation. nicely done!

 

[Ginsly]

I was in a very similar position and wound up desoldering it - whadda pain! It did work, but mostly due to the awesome solder sucker - the Engineer is excellent and made it FAR less maddening than it could have been.

 

[Bio77]

I'd switch the wires around. If you do desolder it, the likelihood of the switch failing in the future will increase. I had foot switches fail on me in the early days because I would overheat them.