Re: [Homebrew_PCBs] Toner transfer problems
2010-04-19 by cary heestand
This seems to be a big problem on most sites. A group of people come up with a way that works, and others post saying, Your process doesn t work, I used
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Re: Toner transfer problems
2010-04-19 by andrewmv@ymail.com
Thanks, everybody, for the advice! Kerry: I ve seen magazine paper used in another tutorial, but didn t see any discussion as to its benefits. It s cheaper
Laminator question- HF
2010-04-19 by milepost1
Has anyone use the Harbor Freight 9 laminator? They are running it on sale right now for $22.99. At that price it might be worth it even if it needs some
Re: [Homebrew_PCBs] Home Made UV Exposure Box
2010-04-19 by Slavko Kocjancic
... mine is 400nm
RE: [Homebrew_PCBs] Toner transfer problems
2010-04-19 by Steve Maroney
I ve had the same problems and complaints with the toner transfer method on my first attempts at making my PCBs. I gave up and tried the photo resist method
Re: [Homebrew_PCBs] Toner transfer problems
2010-04-19 by John Coppens
On Sun, 18 Apr 2010 23:03:57 -0000 ... Just a few suggestions (learned the hard way): - Don t use 150 grit, it s way too coarse, just as Andy said. I use
Re: Toner transfer problems
2010-04-19 by awakephd
Andrew (great name, by the way!), 150 grit seems way too coarse to me, and in my limited experimenting, acetone alone doesn t seem to do an adequate job of
Re: Cut FR4 with a band saw?
2010-04-19 by awakephd
Steve, Home Depot does not carry these, to the best of my knowledge, nor does Lowe s. Instead you need a Harbor Freight or similar store:
Re: [Homebrew_PCBs] Toner transfer problems
2010-04-18 by Kerry Wentworth
A couple of ideas. 1) Try magazine paper 2) Use 00 steel wool or scotchbrite to scrub the board, not 150 sandpaper. I use a laminator now, but when I ironed,
Toner transfer problems
2010-04-18 by andrewmv@ymail.com
I ve just started attempting my first PCBs with the toner transfer method, and I m consistently getting terrible results. Some sections of the pattern transfer
Re: Homepage picture
2010-04-18 by andrewmv@ymail.com
Wow, that was done with toner transfer and MS Paint? I ve found a lot of information on toner transfer online (much of it conflicting). Does anyone have a
Re: Homepage picture
2010-04-18 by alienrelics
That image is from Patrick s Pictures in the Photos section. If this doesn t
Re: My new photo resist spinner
2010-04-18 by bebx2000
Derward, I investigated spin coating a bit further, http://en.wikipedia.org/wiki/Spin_coating http://www.clean.cise.columbia.edu/process/spintheory.pdf%20%20
Re: Homepage picture
2010-04-18 by eldonb46
... homebrew PCB on the group s home page (The FM Receiver with a penny in the photo for scale). What method was used to do this? I haven t been able to get
Re: [Homebrew_PCBs] Re: Cut FR4 with a band saw?
2010-04-18 by Steve
I did find that saw . . . or close to it. They had a 7-inch version, I decided to wait a bit to see if the 4-inch model shows up. But the link I was look for
Re: Cut FR4 with a band saw?
2010-04-18 by sailingto
Here is a link to the home depot site with the saw: http://tinyurl.com/y826qf5
Re: [Homebrew_PCBs] Re: My new photo resist spinner
2010-04-18 by Derward Myrick
Back in the ealy 1960s I worked at a Company that used a record player turntable at 45 rpm. Worked great. Derward Myrick KD5WWI ... From: designer_craig To:
Re: My new photo resist spinner
2010-04-18 by designer_craig
Baxter, Not sure what RPM the motor is running but its fairly fast. I control the speed by modulating the power button with my finger. Guess I need to figure
Re: [Homebrew_PCBs] Re: Cut FR4 with a band saw?
2010-04-18 by Steve
Hi Frank, I took a look today at Home Depot for a saw such as you describe. Did not see one . . . although I might have walked by it and not recognized it. Is
Re: My new photo resist spinner
2010-04-17 by bebx2000
I second the comment: nice job . I have a couple of questions. 1. What is the rpm of the motor? 2. Is the centering or balance of the aluminum disk
Re: My new photo resist spinner
2010-04-17 by James
... Too much work to wire up enough LEDs for even light, a UV fluorescent tube is under 10 bucks and only needs a few wires!
Homepage picture
2010-04-17 by andrewmv@ymail.com
I m new to the group, and impressed with the example photo of a homebrew PCB on the group s home page (The FM Receiver with a penny in the photo for scale).
Re: [Homebrew_PCBs] Re: Breaking a Trace
2010-04-17 by Chris Maness
... Thanks for the tip. I was thinking about just cutting it too. I made a temp folder so that folks can upload to this folder if a file is only relevant to a
Re: Breaking a Trace
2010-04-17 by alienrelics
Files uploaded without a description are subject deletion without notice. It makes my job harder as moderator. It looks like you really don t want to thin that
Re: [Homebrew_PCBs] Home Made UV Exposure Box
2010-04-17 by Leon Heller
... 350 nm. Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] Re: Breaking a Trace
2010-04-17 by Chris Maness
To let you guys see what I am working with. I uploaded my masque with the overlap to the files section in the group. Go to Files - Temp - Overlap.jpg.
Re: [Homebrew_PCBs] Home Made UV Exposure Box
2010-04-17 by Chris Maness
What wavelength is photo resists most sensitive to? Thanks, Chris KQ6UP [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] My new photo resist spinner
2010-04-17 by Chris Maness
... Nice Job! For an exposure box I would recommend UV LED s. You can make a grid for REAL cheap. Chris KQ6UP [Non-text portions of this message have been
My new photo resist spinner
2010-04-17 by designer_craig
I just finished up my new photo resist spinner. Its consists of a plywood box 15 square and 3 high with a modified surplus computer fan mounted in the
Re: Breaking a Trace
2010-04-17 by designer_craig
An xacto blade works but you can also build a circuit blaster from a large capacitor, dc supply and a couple of probe points and a foot switch. Put the probes
Re: [Homebrew_PCBs] Re: Breaking a Trace
2010-04-17 by David Bobb
I m a quality inspector at an electronics company, and I use a brand new X-acto blade to remove traces when the assembly guys miss them. We have boards laid
Re: [Homebrew_PCBs] Re: Breaking a Trace
2010-04-16 by Henry Liu
I use a dental pick under a nikon stereo microscope. It makes like magic and gives a lot more precision easily breaking tracks. Same idea for removing tartar
Re: Breaking a Trace
2010-04-16 by James
... I use a utility knife with a nice sharp blade. Usually I try to dig in a little with the point and then peel back a bit of trace to make sure it s open. Be
Re: [Homebrew_PCBs] Breaking a Trace
2010-04-16 by Stefan Trethan
In such cases I have used a square awl. The square point is ground to a very narrow chisel point only a millimeter wide. Very useful to cut PCB traces. Laid
Re: [Homebrew_PCBs] Breaking a Trace
2010-04-16 by Chris Maness
... The chisel sounds good. I will have to get a really small one as it is a tight spot. Thanks, Chris Maness [Non-text portions of this message have been
Re: [Homebrew_PCBs] Breaking a Trace
2010-04-16 by Stefan Trethan
A very sharp wood chisel gives more control than a knife, because the blade has less flex. You can even make a U shaped gauge to gauge out a sliver, or simply
Re: [Homebrew_PCBs] Breaking a Trace
2010-04-16 by DJ Delorie
I usually use a dremel tool, either with a small burr or a thin cutoff wheel, to cut traces. Xacto works but takes longer. If you do use an Xacto, cut in two
Re: [Homebrew_PCBs] Breaking a Trace
2010-04-16 by Chris Maness
... Yes, I realize that now, but I did not know how to use the netlist/rule checker when I made this design. Thanks, Chris ... [Non-text portions of this
Re: [Homebrew_PCBs] Breaking a Trace
2010-04-16 by Leon Heller
... Your PCB software should have flagged that as an error. I d cut the track on both sides of the pad and join it with a piece of wire. Leon -- Leon Heller
Breaking a Trace
2010-04-16 by Chris Maness
I just noticed that one of my lands over laps a trace. What is the best way of fixing this without having to re-do the whole board? Is the xacto knife my
RE: Re: Cut FR4 with a band saw?
2010-04-16 by Paul Symansky
@Roland, thanks! @James, I initially thought of doing something like that, but the complexity of the project would have been greater by an order of magnitude.
Re: [Homebrew_PCBs] Re: Cut FR4 with a band saw?
2010-04-16 by VK3YV
Hi, I second that, But the BI-Metal blade is essential and it lasts and lasts along with cutting any thing else that comes along. One thing to do though is
Re: [Homebrew_PCBs] Re: Cut FR4 with a band saw?
2010-04-16 by VK3YV
Hi, I second that, and the BI-Metal blade is essential and it lasts and lasts.... Don.... ... From: frankwinter1 To:
Re: Cut FR4 with a band saw?
2010-04-16 by frankwinter1
Hi Steve, Depending on how much room you have in your workshop, have a look at at the cheap chinese bandsaws (~US$200). They are a horizontal saw to cut pipes
Re: [Homebrew_PCBs] Re: Cut FR4 with a band saw?
2010-04-16 by Colin & Alma Lane
I use a Hegner Variable speed scroll saw with a 4/0 blade usually used for jewellery saws.Works fine. Colin Lane Colin Lane Australia [Non-text portions
Re: First Masque Transfer PCB (it no worky)
2010-04-16 by bebx2000
Chris, Here is a site with a wealth of information that you may find interesting, http://www.capefearpress.com/puretchpcb.html There was one reference to this
Re: [Homebrew_PCBs] Re: Cut FR4 with a band saw?
2010-04-16 by Steve
Wow . . . I didn t anticipate so much discussion. Thanks everyone for sharing your wisdom. At least for the moment I am going to forgo the band saw idea and
Re: [Homebrew_PCBs] Re: LPKF 93s
2010-04-15 by Piers Goodhew
There are also quite cheap bare bones USB hard disk adapters - take drive out of 486, plug into adapter, then clone it on virtually anything. I ve had good
Re: [Homebrew_PCBs] Re: First Masque Transfer PCB (it no worky)
2010-04-15 by Leon Heller
... It was a long time ago, but I think it was about the same. It seemed quite transparent to UV. Leon -- Leon Heller G1HSM
Re: First Masque Transfer PCB (it no worky)
2010-04-15 by James
... I found it was hard to get a solid enough print on transparencies. Best with any method to do a test exposure. Cut a strip of board, put a test pattern on