Re: [Homebrew_PCBs] Re: TT trace widths
2010-03-25 by Mark Lerman
If your traces are 10 mil wide and they spread by a mil or so on each side, you might not notice. But that same spread is very noticeable with 7 mil traces.
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Re: [Homebrew_PCBs] Re: TT trace widths
2010-03-25 by Mark Lerman
Craig, Ebay, from a company named TaxiMarket . Search under stage calibrator - there are loads of them listed. Mark
Re: TT trace widths
2010-03-25 by designer_craig
Mark, Where did you order the stage calibrator? I need to get a calibrator and a reticle for one of my eye piece for my B&L. Craig
Re: TT trace widths
2010-03-25 by tda7000
... printout prior to transfer, no visible spreading at all. ... When I tried this I used an iron, I found that if I put the iron too hot or left it on too
Re: TT trace widths
2010-03-25 by James
... I haven t measured the actual traces, but they look identical to the printout prior to transfer, no visible spreading at all.
[Homebrew_PCBs] TT trace widths
2010-03-25 by Mark Lerman
Has any been measuring the actual trace widths produced with toner transfer? I would think that running it through a laminator would significantly spread the
Re: HCl Etchant Question
2010-03-24 by James
... 140F is not hard to achieve. I use a fish tank heater in the etching tank I built, I think I paid $3 for a bag of used aquarium accessories at a garage
RE: [Homebrew_PCBs] Re: HCl Etchant Question
2010-03-24 by Roger Blair
Just a hobby hacker here, not a chemist… IIRC, 140F to become effective?. Wouldn’t this be a problem for this application? I was going to try sodium
Re: Using a home made CNC router for pcb milling?
2010-03-24 by gnuvvekaavaali
Did you pick up the zentoolworks kit? Any discount for pick up in person? Does he add CA taxes to the price? :-) Do keep us posted on the build. I am very keen
Re: [Homebrew_PCBs] Re: HCl Etchant Question
2010-03-24 by Leon Heller
... It s difficult to make in quantity, that device is *very* inefficient. It s just as well, it would make you rather ill, otherwise. Leon -- Leon Heller
Re: [Homebrew_PCBs] Phenolic PCB
2010-03-24 by Roland F. Harriston
Yes Roland F. Harriston, P.D.
Re: [Homebrew_PCBs] Phenolic PCB
2010-03-24 by Tolga Abaci
Yes, it will hold up. I ve succesfully done many boards with toner transfer on phenolic material. ... [Non-text portions of this message have been removed]
Phenolic PCB
2010-03-24 by threetoes1943
Hello Group: Will phenolic PCB material hold up to the heat and pressuer of the toner - iron transfer methoid? Or should fiberglass boards be used? Roger,
Re: [Homebrew_PCBs] pcb picture techniques
2010-03-24 by Stefan Trethan
I thought you mean a bare PCB! ;-) Anyway mine does stuffed ones just fine, it is also an old thick model. But it tends to look strange with high components,
Re: [Homebrew_PCBs] Re: HCl Etchant Question
2010-03-24 by Simao Cardoso
... Thanks for posting this, I have seen this fast etchant for sale around here too, and normally, because my curiosity i rush on finding what is it made off,
Re: pcb picture techniques
2010-03-24 by alienrelics
... Agreed. I have an old HP 4P SCSI scanner, I can set a stuffed circuit board part side down on it and it is all in focus. Then I bought an 8 year newer thin
Re: [Homebrew_PCBs] Re: Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-24 by Philip Pemberton
... These aren t Wood s Glass -- I ve got an F4T5/BLB somewhere, which is a deep purple/black colour when switched off; these tubes are off-white and look like
Re: pcb picture techniques
2010-03-23 by James
... All scanners are not equal. I tried one of those new super slim LED flatbed scanners and found it was useless for scanning anything that had any depth. My
Re: Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-23 by James
... Ordinary glass does not block much of the long wave UV used here, a quartz pane would be very expensive. /BL tubes are a better choice than /BLB. The Woods
Re: HCl Etchant Question
2010-03-23 by James
... One of the thingsI like about CuCl is that it is transparent enough to see what s happening without pulling the board out. It gets darker and darker as
Re: HCl Etchant Question
2010-03-23 by James
... I can t speak for how well it would work, but ozone is not at all difficult to make. My hot tub has an ozonator in it, the device is nothing more than a
Re: pcb picture techniques
2010-03-23 by awakephd
This is a trick that DJ has shared before, and it really works well. I just wish I had known it long, long ago!
Re: [Homebrew_PCBs] pcb picture techniques
2010-03-23 by Mark Lerman
I have a macro setup I use for insect photography - a 200mm Canon macro with a two head macro flash with diffusers - that I might try. Mark
Re: [Homebrew_PCBs] pcb picture techniques
2010-03-23 by Mark Lerman
I tried a scanner, but the image seems out of focus. Any special settings? Mark
Re: [Homebrew_PCBs] pcb picture techniques
2010-03-23 by DJ Delorie
I use a macro setting on the camera, with flash, but one unusual trick - I put a piece of white paper in front of the flash, angled down to face the PCB. That
Re: [Homebrew_PCBs] pcb picture techniques
2010-03-23 by Leon Heller
... I get quite good results with my Nikon D80 with the stock zoom lens, handheld, with the built-in flash. I have a macro lens, but I usually can t be
Re: [Homebrew_PCBs] pcb picture techniques
2010-03-23 by Stefan Trethan
A scanner, use a flatbed scanner. ST
[Homebrew_PCBs] pcb picture techniques
2010-03-23 by Mark Lerman
How do you get good quality pictures of pcbs? Would a good macro lens and ring lighting be best, or is there a better way? Mark
polygon and hole using eagle
2010-03-23 by christiansen_alex@hotmail.com
hi members about layout I have to make a rectangel with a pad inside ,where the hole is 8 mm and the soldermask is 12 mm . I have tried several ways, but the
Re: [Homebrew_PCBs] Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-23 by Philip Pemberton
OK, I think I may have a retraction to publish.... I ve just finished re-doing the Fotoboard step-wedge tests using LaserStar film. Seems my laser printer *is*
Re: [Homebrew_PCBs] Re: HCl Etchant Question
2010-03-23 by Leon Heller
... Ozone is difficult to make, rather toxic, and won t work very well. Leon -- Leon Heller G1HSM
Re: HCl Etchant Question
2010-03-23 by Ben L
... You have to get enough copper in it first, then air will work.
Re: HCl Etchant Question
2010-03-23 by Ben L
... Air Bubbling works great. I don t put peroxide in it anymore. Sometimes add some HCL from time to time and sometime leave the lid off to reduce the level
Re: SMD Tweezer Tester with Multimeter
2010-03-22 by jamesmichaelnewton
Steve didn t claim to own the internet, and hyperbole like that doesn t help. Steve OWNS THIS LIST. And if he says it s going to stay narrowly on topic, I
Re: HCl Etchant Question
2010-03-22 by bebx2000
Maybe a better source of oxygen is sodium perborate. A while back, I accidentally stumbled upon this site while searching the topic of PCB etching,
Re: [Homebrew_PCBs] Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-22 by Philip Pemberton
... Apparently not... I haven t noticed any issues with poor line definition (which AIUI is the main effect of poor collimation). It certainly goes down to
Re: HCl Etchant Question
2010-03-22 by Bip's
Has anyone tried just bubbling with O3 (ozone) ? That might be a good alternative to too diluted H2O2 as ozone is a good oxidizer if I recall right. $0.02
Re: [Homebrew_PCBs] Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-22 by Leon Heller
... Won t you get a lack of collimation with such a short distance? Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] HCl Etchant Question
2010-03-22 by Harvey White
... Just bubble air. IIRC, it will convert to CUCL soon enough. That will require air to work. Harvey
Re: [Homebrew_PCBs] Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-22 by Leon Heller
... I print on Jetstar Premium, and let it dry for an hour or so. I handle it carefully and don t have any problems with scratches. Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-22 by Philip Pemberton
... So a fairly low powered unit then? The AZ210 I m using has four 15W Sylvania F15W/350BLB-T8 tubes on each side, spaced about 2 apart, with a rather odd
Re: [Homebrew_PCBs] Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-22 by Philip Pemberton
... Image here: http://img403.imageshack.us/img403/3346/xyzbrdtl.jpg The photoresist seems to get stained by the FeCl - it starts out dark green/blue, then
Re: [Homebrew_PCBs] Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-22 by Philip Pemberton
... What are you printing on with the inkjet? Tracing paper, JetStar Premium, JetStar, normal OHP film or something else? I find the Stabilo inkjet OHP film
Re: [Homebrew_PCBs] HCl Etchant Question
2010-03-22 by DJ Delorie
It s not oxyGEN you need, it s an oxiDIZER you need. Bubbling oxygen through the solution can re-oxidize the chemicals that are there (such as with CuCl
Re: [Homebrew_PCBs] Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-22 by Leon Heller
... I orginally used a laser printer with Laserstar film, but get much better results with an inkjet printer. No pin holes, for starters. Leon -- Leon Heller
Re: [Homebrew_PCBs] HCl Etchant Question
2010-03-22 by Leon Heller
... It s not all that dangerous, but you won t get much, if any, oxidisation. H2O2 is needed. Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-22 by Leon Heller
... I don t have any problems using Fotoboard 2 with my home-made UV exposure unit (two tubes about 15 cm from the glass. I found the optimum exposure level
Re: [Homebrew_PCBs] Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-22 by Philip Pemberton
... I just did a test run at 75 seconds based on some times I found posted to a forum. That worked pretty well -- the board is in the etch tank at the moment.
Re: [Homebrew_PCBs] Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-22 by DJ Delorie
Step 8 is a good exposure point for negative films, I don t know about positives. Based on the photo, I d shoot for an exposure time of around 85 seconds -
[Homebrew_PCBs] HCl Etchant Question
2010-03-22 by Mark Lerman
As I understand it, the H2O2 is used to provide oxygen to the HCl, but using 3% peroxide slows it down because of dilution of the HCl. Has anyone tried just