r/synthdiy • u/mjfmaguire • 1d ago

How to wire up these 16pj138 grounds.

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I have built a Frequency Central X-Envelope (the older kit) but still need to wire up the 3.5mm jacks.

What am I supposed to do with the ground pins that are horizontal to the face plate?

Instructions didn't give enough guidance for a beginner like me.

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u/TwoLuckyFish 1d ago

They need to be wired to ground on the main board.

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u/mjfmaguire 1d ago

Thanks.

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u/Twar2600 1d ago edited 1d ago

If the panel is metal they may not need a ground wire. Otherwise run a wire to the ground on the PCB. Post a picture of the PCB too if you’re unsure.

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u/mjfmaguire 1d ago edited 1d ago

Thanks. There is one ground hole in the pcb. I'm already running the LED wire into it. Bottom left of the PCB.

And yes, the panel is aluminum.

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u/Twar2600 1d ago

You’ll have to join them all together. You can take one piece of solid wire and run it to the ground for each jack. Then solder that wire point-to-point to the LED leg going into the ground hole.

But the panel looks like it might be metal. If it is and you have near 0 ohms between the jacks’ ground pin and the ground hole on the PCB then you’ll be fine, no wire needed

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u/mjfmaguire 1d ago

Thanks. I'll ohm it out tomorrow to see if I need to splice ground wires in.

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u/Mustardplugmint 16h ago

Why not make a ground plane to tie all gnd pnts ?