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Homebrew PCBs

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Re: Dip/spin coater for photo emulsion

2004-01-15 by roel_cnc

... as i said ... so we did - i never said lets build them it is just another way to get a resist on Ow Adam do you have some pictures or so online from the

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Re: Dip/spin coater for photo emulsion

2004-01-15 by mikezcnc

Coating is no problem: rotational, inertial, even, sprayed, smoothed, temp controlled, etc. If coatings are not available, then you make them. You can always

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Re: [Homebrew_PCBs] Re: etch resist

2004-01-14 by pebo festus

yes it hardens in the presents of carbon dioxide, they use it in foundry work to harden the sand molds instead of baking lindseed oil in the sand. i just dont

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Re: [Homebrew_PCBs] Soldermask?

2004-01-14 by Stefan Trethan

On Tue, 13 Jan 2004 18:07:06 -0700, Robert Ussery ... No board hoses use silk screen for that in 99% of the cases i think. the screen can

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Re: Silk Screen

2004-01-14 by grantfair2001

Fabric screens to make PCB s are commonplace, work well, and only require wooden frames to hold the fabric. I have about 50 used ones in my basement from a

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Re: Photo Etching Method

2004-01-14 by Ben H. Lanmon

If you are looking for bare boards Mouser www.mouser.com has some 4 x 6 8 x 10 and 12 x 12 . These are a FR-4 composite. That will give you one more

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Re: Photo Etching Method

2004-01-14 by Ben H. Lanmon

... the ... I buy M. G. Chemicals products. I use their 600 series pos. presensitized boards. They are not the cheapest. I buy the M.G. Chemicals thru

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RE: [Homebrew_PCBs] Soldermask?

2004-01-14 by Robert Ussery

... Cool... I ll have to look for this. Is this what the pros (boardhouses) use? ... Just carefully brush it on around them. Time consuming, but better than

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Water glass etch resist

2004-01-13 by Steve

... Yikes! Corrosive, at least it is to flesh. http://ptcl.chem.ox.ac.uk/MSDS/SO/sodium_silicate.html http://www.infoplease.com/ce6/sci/A0851590.html Steve

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Re: etch resist

2004-01-13 by Steve

... It hardens in the presence of carbon dioxide? I thought you d just let it dry. I suspect, as Stefan says, you d need a piezo head inkjet, not a bubblejet.

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homemade cnc soldering

2004-01-13 by Ted Huntington

Has anybody made a homemade cnc that does soldering (and/or part placement)? That would be intense. Ted ******************** Ted Huntington Programmer Analyst

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Dip/spin coater for photo emulsion

2004-01-13 by roel_cnc

Hi to all Lets talk about a dip or spin coater, any of you heart of it !! That are machines even aesy to make, dip- as it say s dips the cu clad board in a

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Re: Photo Etching Method

2004-01-13 by bsjoelund

... because ... Dont purchase presensitized material more than for 6 months usage, keep material cool/dry/dark! I have had bad experience with unsensitive

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Re: [Homebrew_PCBs] etch resist

2004-01-13 by Stefan Trethan

... i tried acrylic floor polish in a hp bubblejet (thermo-head). did not work. head gummed up instantly. try a piezo-based head only... i don t know if water

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etch resist

2004-01-13 by pebo festus

i was just wondering if any one has tried putting water glass (sodium silicate) in a printer cartarage, printing the traces, then expose the water glass to

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Re: [Homebrew_PCBs] Soldermask?

2004-01-13 by Stefan Trethan

On Tue, 13 Jan 2004 12:55:21 -0700, Robert Ussery ... for this thers is some photoresist-like soldermask. you spray it on, then expose

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Re: Photo Etching Method

2004-01-13 by mikezcnc

Good idea Steve, but those are probably the bare PCBs and I am not sure if spraying a positive coating is a reliable method. Mike ... Photo ... Heat ... 100%

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RE: [Homebrew_PCBs] Soldermask?

2004-01-13 by Robert Ussery

I need surface mount solder masking. I ve had some trouble with solder bridges under the part because of running traces and vias underneath parts on crowded

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Re: [Homebrew_PCBs] Soldermask?

2004-01-13 by Stefan Trethan

On Tue, 13 Jan 2004 12:41:06 -0700, Robert Ussery ... what do you need it for? protection against oxydizing of copper tracks or for

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My recent PCB experience

2004-01-13 by Ted Huntington

I want to share my recent PCB experience: I find the best low cost setup for me is: 1) Eagle light free software (I use in XP, but since I had to make most of

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Re: [Homebrew_PCBs] Photo Etching Method

2004-01-13 by Stefan Trethan

... good source for pcb material is ebay. i have bought a maybe lifetime supply for ... not much.. the parcel was so heavy i had a hard time carrying it inside

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Soldermask?

2004-01-13 by Robert Ussery

Hi, Folks. Are any of you using a DIY solder mask? If so, how do you do it? I ve been thinking I might try manually brushing some thinned epoxy onto the board.

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Photo Etching Method

2004-01-13 by mikezcnc

MikeZ_Photo_Etching in files section show my latest progress in Photo Etching. In reality, the PCBs look perfect and very expensive. Gentlemen, I appreciate

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