Re: Finally! A good toner transfer. On to etch.
2010-02-15 by roycepipkins
Like you, I often don t have a ground plane. I ve found that direct etch works well only with 1/2 oz copper. With 1 oz copper you are looking at 8 to 10
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Laminator + Iron
2010-02-15 by thedancarter
Hi all, I recently gave TT another try after giving up and going back to photo boards. Problem was inconsistent pressure with iron, or crappy Aldi laminator
RE: [Homebrew_PCBs] Finally! A good toner transfer. On to etch.
2010-02-15 by Jim Barnes
Hi again, Responding to part of my own question... Perhaps I rushed to judgment too quickly on HP Presentation Paper. I may try it again for PCBs later. In the
Re: [Homebrew_PCBs] Finally! A good toner transfer. On to etch.
2010-02-15 by DJ Delorie
You could try what I do for UV film - tape the leading edge of the TRF to a piece of paper (carrier), so the paper holds the front edge flat and you can hold
Re: Finally! A good toner transfer. On to etch.
2010-02-15 by sailingto
As others have said, the white doesn t hurt anything as long as it s not over the copper. A bit of rubbing can remove any while that s over the copper. Yep,
Re: [Homebrew_PCBs] Finally! A good toner transfer. On to etch.
2010-02-15 by Kerry Wentworth
I have tried direct etch once or twice, and it seems to me that it works fine, unless you ve had to touch-up the transfer. It seems to rub the Sharpie ink
Re: [Homebrew_PCBs] Finally! A good toner transfer. On to etch.
2010-02-15 by Harvey White
... ... I suggested that. I may have neglected to say that I rubbed the foil rather aggressively to smooth it out on the board. That has worked for
RE: [Homebrew_PCBs] Re: Finally! A good toner transfer. On to etch.
2010-02-15 by piers@u-h-p.com
in fact the white film may well block some/all pinholes. Definately not bad unless it s spanning traces PG ... -original message- Subject: [Homebrew_PCBs] Re:
Re: [Homebrew_PCBs] Finally! A good toner transfer. On to etch.
2010-02-15 by DJ Delorie
... Not enough heat. I run my laminator about 20 degrees hotter than the default. ... Yes, and it works just fine. What I did was half-fill a large container
Re: Finally! A good toner transfer. On to etch.
2010-02-15 by awakephd
Jim, the white film on top of the toner won t hurt a thing. As long as there isn t any paper between the traces, just go ahead and etch.
Re: [Homebrew_PCBs] Re: UV exposure box
2010-02-15 by DJ Delorie
... I use a triangular grid, spacing about 1 , about 5 from the board. Total 99 LEDs, in 11 strings of 9 on a 37 volt power supply:
Finally! A good toner transfer. On to etch.
2010-02-15 by jimofc300
Hi, In my PCB adventures, I finally got a good transfer. I should have followed my own rule: Follow the manufacturer s directions until you really know what
Re: [Homebrew_PCBs] Re: UV exposure box
2010-02-15 by DJ Delorie
... If you have an epson printer that can do 2880 dpi, I have a program that prints PBM files with 100% ink coverage - so much ink you need specially coated
Re: [Homebrew_PCBs] Re: Muriatic acid + drug store hydrogen peroxide => cannot get cupric chloride??
2010-02-15 by DJ Delorie
... Usually 3-6 minutes depending on how long I let it warm up first, and if I manually swish it around in the etchant or let the bubbler do the work. ...
Re: Toner Transfer Printer Recommendation
2010-02-14 by sailingto
You might find some HP High Gloss Laser Paper Q2419A - this seems to work pretty good. You can always try a slick glossy magazine paper - the text on it
Re: [Homebrew_PCBs] UV exposure box
2010-02-14 by Barry Demers
Interesting. I ll take a look on my next trip to Manard s ... -- Thank you, Barry [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] UV exposure box
2010-02-14 by William
... lighting centers in places like Home Depot have a chrome-reflective plastic grid that is used to sorta collimate florescent bulbs. i ve seen these same
Re: [Homebrew_PCBs] UV exposure box
2010-02-14 by Barry Demers
Yes, you don t want to get too close. I haven t taken the time to do any calcs on this stuff yet. I simply have a system that works and will improve on it as
Re: UV exposure box
2010-02-14 by designer_craig
Barry, I have also been thinking about a UV led box. Five minutes seems ok to me. Can you describe your LED array? What sort of spacing do you have on the LED
Re: [Homebrew_PCBs] Re: Muriatic acid + drug store hydrogen peroxide
2010-02-14 by Yngve
OK, the instruction I ve read are on the trimer, which requires cooling. Looks like it _can_ occur accidentally too. So now we re all suspected terrorists. ...
Re: UV exposure box
2010-02-14 by Ben L
... I have 4 15 Watt 18 lamps and do upto 8 x 12 boards at about 6 from the lamps. Use to expose about 6 mins. but now have found that 10 mins is better
Re: [Homebrew_PCBs] Re: Muriatic acid + drug store hydrogen peroxide
2010-02-14 by Stefan Trethan
Would be nice if you could correct wikipedia. ST
Re: Target 3001 schematic capture, PCB, simulation, etc.
2010-02-14 by sailingto
Yep, ExpressPCB seems to do everything I actually need for toner transfer except mirror the print, but since my printer will mirror it s not a problem. As of
Re: [Homebrew_PCBs] Re: Muriatic acid + drug store hydrogen peroxide
2010-02-14 by Yngve
That s rubbish. Make a search on how acetone peroxide actually is produced and the needed care and equipment. Besides, it would stay in solution and decompose
Re: [Homebrew_PCBs] Re: Measurements for the male side of an edge connector?
2010-02-14 by Stefan Trethan
Most packages have separate component/symbol editors, such as Eagle, Pulsonix, ... Some, like Target, let you draw the symbols and footprints right in layout
Re: [Homebrew_PCBs] Re: Muriatic acid + drug store hydrogen peroxide
2010-02-14 by Stefan Trethan
What is also likely is that you might attract the wrong kind of attention by buying those three chemicals together. ST
Re: [Homebrew_PCBs] Re: Muriatic acid + drug store hydrogen peroxide
2010-02-14 by toddroberts2001@aol.com
Hi All, I don t know if this has been covered before but in using the chemicals Muriatic Acid (hydrochloric acid) and Hydrogen Peroxide to etch circuit boards
Re: [Homebrew_PCBs] UV exposure box
2010-02-14 by Leon Heller
... Don t forget that you lose collimation with shorter distances. Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] UV exposure box
2010-02-14 by Barry Demers
Since you can measure your exposure with accuracy, reduce your distance and increase your time. For example, 6 distance should equate to 6 minutes. (half the
Re: Muriatic acid + drug store hydrogen peroxide => cannot get cupric chloride??
2010-02-14 by awakephd
Okay, it sounds like I m back to plan A -- saving the etchant and making a bubbler tank down the road. A followup question -- now that you have the CuCl, how
Re: Measurements for the male side of an edge connector?
2010-02-14 by awakephd
Hmm -- as a followup to my question about Kicad compared to diptrace et al., I tried making a 10-finger edge connector in Kicad. It was very easy to do, and
Re: Toner Transfer Printer Recommendation
2010-02-14 by g6lbq
Thanks for the reply. I can buy the HP LaserJet P1505/EN 23ppm USB 2MB Mono Laser Printer from my computer supplier here in the UK and I noticed from digging
Re: Target 3001 schematic capture, PCB, simulation, etc.
2010-02-14 by alienrelics
That s the one I started using, then had trouble making a male edge connector. I found it very easy to get started in, and it has not been bad to learn, I just
Re: [Homebrew_PCBs] UV exposure box
2010-02-14 by DJ Delorie
... Sure, just pick up a transmission step gauge and a timer. I ve got my UV box down to exactly where the film says the exposure should be, and I know how
Re: Target 3001 schematic capture, PCB, simulation, etc.
2010-02-14 by James
... I m actually really liking ExpressPCB lately, although I do wish there was a utility to conveniently convert the output to more standard formats. Obviously
Re: Toner Transfer Printer Recommendation
2010-02-14 by James
... It s hard to go wrong with HP, I m also having good luck with my Xerox, but I don t think it s current production. I suppose you could take some transfer
Re: [Homebrew_PCBs] UV exposure box
2010-02-14 by Barry Demers
Absolutely, a single F15T8-BL. One. OK, I ve been using a positive method, pre-sensitized board. The amount of time that it takes to cure the resist is a
Re: [Homebrew_PCBs] Re: Target 3001 schematic capture, PCB, simulation, etc.
2010-02-14 by Paul Mateer
I still use and LOVE OrCAD386 for DOS (yes...DOS). Schematic capture/pcb layout. All of which can be found FREE in their Yahoo group (dosorcad). There is
Re: [Homebrew_PCBs] Measurements for the male side of an edge connector?
2010-02-14 by H. Carl Ott
... Another possibly minor issue is that the edge of the pcb should be beveled to accept the mating connector. Back in the 80 s we used to have a lot of S-100
Re: [Homebrew_PCBs] UV exposure box
2010-02-14 by DJ Delorie
... A single 15 watt bulb? I ve been pondering upgrading to two-sided UV exposure, but my LED box exposes in only 5 minutes. Can you reduce the exposure time
Re: [Homebrew_PCBs] Muriatic acid + drug store hydrogen peroxide => cannot get cupric chloride??
2010-02-14 by DJ Delorie
... This is wrong - I did exactly that. I started with two parts 3% (drugstore) peroxide and one part 37% (hardware store) HCl, added copper, and now have a
Re: [Homebrew_PCBs] Toner Transfer Printer Recommendation
2010-02-14 by Kerry Wentworth
I use an HP LaserJet 1100 that I found at the dump with a cheap replacement toner cartridge from eBay, and magazine paper. I got a GBC Personal Laminator on
Re: Measurements for the male side of an edge connector?
2010-02-14 by alienrelics
The only -male- edge connectors are schematic only, no PCB pattern. I needed a pattern for the plug, not a pattern of pads for the socket. I did manage
Re: Toner Transfer Printer Recommendation
2010-02-14 by sailingto
Boy does everyone have their own ideas there. For sure way to make it work you need 3 things. Printer, paper, and a laminator. Printer: HP P-1006 is a decent
Re: [Homebrew_PCBs] UV exposure box
2010-02-14 by Barry Demers
After reading your post yesterday, I decided that building an exposure box for 2 sided boards is a huge step toward getting 2 sided boards out of my kitchen
Toner Transfer Printer Recommendation
2010-02-14 by g6lbq
Hi Everyone, this is my first post in the group. I am interested in making my own PCB s using the Toner Transfer method and was wondering if anyone can suggest
Re: Measurements for the male side of an edge connector?
2010-02-14 by Ben L
... That seems odd that Dip Trace can not do a Edge Connetor as Mine has a Library of several edge connectors. I have not ever used Edge Connectors or tried
Re: Muriatic acid + drug store hydrogen peroxide => cannot get cupric chloride??
2010-02-14 by designer_craig
I don t see why it would not regenerate with air. However, because the drug store H202 is only 3% you resultant solution is going be fairly weak in CuCl, you
UV exposure box
2010-02-14 by designer_craig
I was thinking of making a new UV exposure box. Got rid of my old one years ago when I was in a down sizing mood. Been looking for UV bulb sources. I
Re: Target 3001 schematic capture, PCB, simulation, etc.
2010-02-13 by sailingto
I used diptrace for a while and it was pretty good. Not sure why I quit using it - I think mostly because a buddy was already using PCBExpress and he wanted