Alan B wrote:Jeremy, have you tried that easy to make home etchant instead of ferric chloride? It was a mix of something like muriatic acid and hydrogen peroxide or some such. Hardware store stuff. Here is some info:
http://hackaday.com/2008/07/28/how-to-e ... sided-pcb/
amberwolf wrote:Just in case it's useful to know a way *not* to do it, here's the PCB I started trying to work out for the MC33035 chip, which would've used six TO264 FETs NTY100N10. At the time I did not realize I'd need separate gate drivers, and that I could probably not successfully drive them directly from the MC33035. These are from June of 2009. I've sure learned a lot since then.
I agree about the manual track layout...but it is very frustrating when the software tries to remap your carefully placed traces to somewhere else, for reasons you can't understand, and when you haven't initiated any actions that should cause it to even try.
Alan B wrote:Jeremy, have you tried that easy to make home etchant instead of ferric chloride? It was a mix of something like muriatic acid and hydrogen peroxide or some such.
liveforphysics wrote:CNC the boards.
No copper clean-up.
Holes drilled, and accurately.
Cost? $0.00 if you're doing something to help the electric revolution (like this project.)
Tiberius wrote:I used to do all this etching and drilling. But over 20 years ago I decided it was simpler to send the artwork off and get the boards made. I'm sure that if I took my time into account then it was cheaper.
For me, the real killer was that I was always working with double sided boards and needed plated through holes.
Another advantage was that I would always get a few more boards than needed as part of the deal. So there was always a supply of breadboards that could be modified for the Mk2 or for another project.
Since then, I have found myself working with smaller and smaller components, and the cost of getting boards made has come down, so for the sort of stuff I do, the balance has shifted even more in favour of not doing it yourself.
Jeremy, what resolution can you work down to?
Luke, what's the finest groove you can machine?
nieles wrote:are the fet drivers good enough for 6 of these fets?
Jeremy Harris wrote:The parts I was waiting for have now arrived, so with luck I may get the board up and running later today.
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