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Extending the soundscape of a hexaphonic guitar pickup
awemawson:
Years ago there was a thing called a Dalo Pen, that had a thick ink that was resistant to ferric chloride etchant. A bit of a pain to use but a very quick way of making simple PCBs
They were very expensive but I found that Layout Blue was etch resistant so I refilled marker pens with it.
RussellT:
I've tried a few of the internet methods using photo paper etc, but I decided that buying the press and peel paper wasn't as expensive as wasting copper clad board.
Russell
vtsteam:
Pretty amazing project sorveltaja, and extremely well detailed. :jaw: :coffee: :beer:
sorveltaja:
Awemawson, yes I use Decon Dalo pens occasionally to patch weak/broken transfer traces. There is a small story, considering the Dalo pens: back in the 90's I went to electronics shop, and wanted one of them, although being expensive. When all the stuff was paid, sales person did put them in the plastic bag.
After some months went by, and there was need to use the pen, I opened the box, and it was full of Dalo pens... dozen or more of them. I thought of returning them, to be fair, but didn't have the receipt anymore.
I still have some of them left, good as brand new. Bit of a history, as that seems to be discontinued product.
Russell, thanks for the suggestion. When thinking of it, Press-and-Peel(or UV-method) could well work better, when the traces are really thin, and high precision is required, like on the layouts, that use smd(surface mount device) ic's/components.
Vtsteam, thanks for the heads up. It is my aim to document the project(s) as well, as I can. That way it makes more sense to me, of what I'm doing. Hopefully it makes projects like this easier to approach, even if one doesn't have a massive experience in electronics(me neither), but is still interested in experimenting.
In the end, the compander bus board is now finished, and connections tested:
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The four pin header on the right side is for the op-amp -board(to be done), that sets the output level using a pot. The pot on the upper side is to adjust the 'vocoder threshold'.
At this stage, further testings have to wait, until rest of the bus boards are made. Otherwise the results(and amount of wires needed to connect all together) might end up being a great confusion.
Ordered pc boards should arrive in next monday. All the 'blocks' are finished, except the output op-amp. Next onto that.
sorveltaja:
It is always a positive surprise, when ordered stuff arrives earlier than expected. That's what happened, and now the project is at this stage:
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Some wirings and the output op-amp board needs to be made. After that, it's finally time to find out, how all those circuits works together.
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