Fotoboard2 / step wedge issues - am I doing something wrong?
2010-03-22 by Philip Pemberton
Hi guys, Here s a step wedge from my latest attempt to make Fotoboard2 work properly: http://img413.imageshack.us/img413/8161/xyzvm.jpg Exposure time was 340
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FS/FT: LaserStar UV transfer film
2010-03-22 by Philip Pemberton
Hi guys, I bought three packs of A4-sized LaserStar film a couple of months ago; one from Farnell, two from Rapid. Problem is, these don t work in my laser
Re: SMD Tweezer Tester with Multimeter
2010-03-21 by alienrelics
... Exactly! Thank you, Peter, well said. I, too, have left several lists where off-topic chatting overwhelms the purpose of the list. Mark, you can join or
Signal Integrity for PCB Designers
2010-03-21 by alienrelics
...
Re: link to simple capacitance meter
2010-03-21 by alienrelics
Please post this to the Electronics_101 list. http://groups.yahoo.com/group/Electronics_101 That link translated to English: http://tinyurl.com/y9u3bwl Steve
Re: Pizzaz pizza oven for reflow update
2010-03-21 by Henry Liu
I have played with this more. The original Pizzaz pizza oven comes with a 12 or so pizza pan that spins around. To know if there is a pizza pan on top, the
Pizzaz pizza oven for reflow update
2010-03-20 by Henry Liu
Got my oven from Walmart and tried it out. It works pretty well! A few points: -12 minutes was enough to back some test SOICs I put on with some solder paste
Re: [Homebrew_PCBs] how to assemble a .4mm pitch QFP?
2010-03-20 by Leon Heller
... Drag soldering might be easier than using solder paste. Leon -- Leon Heller G1HSM
Re: Epson Inkjet Transparency Film
2010-03-20 by jamesgailer
how to assemble a .4mm pitch QFP?
2010-03-20 by John McCormick
I made a new PCB and have a .4mm pitch 128 pin device on it. Any tips how to solder it with solder paste? Usually I order a lasercut stencil out of mylar but
Re: [Homebrew_PCBs] JAMECO "Etch Your Own Circuit Board" email
2010-03-20 by Harvey White
... I use the D54518 rotary tool, that s the IB/E one, 117 volts, 20K RPM. The stand I use is cobbled together from a drill stand (may well have been proxxon
Re: [Homebrew_PCBs] JAMECO "Etch Your Own Circuit Board" email
2010-03-19 by Steve
Thanks David. Anyone else using a Proxxon Micromot 28606 drill stand? What model rotary tool do you have? Does that combo work well for drilling PCB s? Thanks.
RE: [Homebrew_PCBs] Re: Using a home made CNC router for pcb milling?
2010-03-19 by Snow.Nick
Hi I ve build one out of a old Y/X table. The machine is made out of junk i have had lying around except the Geko drive s for motor controllers. It s is a bit
Re: Using a home made CNC router for pcb milling?
2010-03-19 by snow
Hi I ve build one out of a old Y/X table. The machine is made out of junk i have had lying around except the Geko drive s for motor controllers. It s is a bit
Re: Using a home made CNC router for pcb milling?
2010-03-19 by snow
Hi I ve build one out of a old Y/X table. The machine is made out of junk i have had lying around except the Geko drive s for motor controllers. It s is a bit
Re: Using a home made CNC router for pcb milling?
2010-03-19 by snow
Hi I ve build one out of a old Y/X table. The machine is made out of junk i have had lying around except the Geko drive s for motor controllers. It s is a bit
Re: [Homebrew_PCBs] Re: Using a home made CNC router for pcb milling?
2010-03-19 by Mark Lerman
Kim doesn t want the machine because the Z axis is solenoid controlled (not motorized), so it is still available. Anyone who wants it please contact me
Re: [Homebrew_PCBs] Re: Etching Problem
2010-03-19 by Mark Lerman
Thanks for the information - I knew I had to be doing something wrong! Mark
Re: Using a home made CNC router for pcb milling?
2010-03-19 by sailingto
Kim, that s why I ve never been much on lottery tickets - odds were just too bad.... much like slots in the casinos - they are programmed to pay out less than
Re: Using a home made CNC router for pcb milling?
2010-03-19 by mat_henshall
Kim, I am in San Jose too... When you get your new toy up and running, we should compare notes. Mat
Re: Using a home made CNC router for pcb milling?
2010-03-19 by mat_henshall
Damn, Not quite fast enough! Mat
Re: Using a home made CNC router for pcb milling?
2010-03-19 by mat_henshall
Glad to see others have tried and some like it... I have decided to try the cheap route first.. I am going to pick the kit up on Saturday. Well cheap compared
Question on etch tank
2010-03-19 by blue_eagle74
I want to make my own glass etching tank. What is the best edge sealing material should I use? The top will be open. I currently use a one piece plastic tank.
Re: [Homebrew_PCBs] Re: Etching Problem
2010-03-19 by Herbert E. Plett
30 vol is 3%. the vol indication is about how much O2 is produced from the product. 3% has water enough, don t need to add more. what runs out is the O2
Re: [Homebrew_PCBs] JAMECO "Etch Your Own Circuit Board" email
2010-03-19 by David Griffith
... That s the one. ... I haven t actually purchased any Proxxon tools yet. I m waiting until after a move and some other things are taken care of first. --
Re: [Homebrew_PCBs] Re: Etching Problem
2010-03-19 by mlerman@ix.netcom.com
Herbert, Ah, it does say 30 vol - I assumed that was 30% by volume (I m not by any means a chemist). Please educate me as to the difference and what it implies
Re: [Homebrew_PCBs] Etching Problem
2010-03-19 by DJ Delorie
I used 2 parts 3% H2O2 and 1 part 37% HCl. After doing what boards I had ready for it, I added enough copper to convert it to a CuCl etchant, which is stable.
Re: [Homebrew_PCBs] JAMECO "Etch Your Own Circuit Board" email
2010-03-19 by Steve
I agree with your assessment of the Dremel tools, that s why I was inquiring of the group about the JAMECO unit. I see the Proxxon Micromot 28606 drill stand.
Re: [Homebrew_PCBs] Re: Etching Problem
2010-03-19 by Herbert E. Plett
are you sure it is 30%, and not 30 vol? 30% is very hard to get. don t put any water in. to reuse add more H2O2, water enough...
Re: Using a home made CNC router for pcb milling?
2010-03-19 by James
... The hardware is the tough part, it has to be well made, sturdy and precise, this usually means $$. If you only want to drill and not do any kind of
Re: [Homebrew_PCBs] Re: Etching Problem
2010-03-18 by Mark Lerman
I m using 30% H2O2, not 3%, but I have to do some calculations to compare the two. Mark
Re: [Homebrew_PCBs] Etching Problem
2010-03-18 by Mark Lerman
DJ, I mixed it immediately before using from sealed containers. When you mix the 4 L, do you keep it in an airtight (covered) etching tank, or do you pour it
Re: Etching Problem
2010-03-18 by awakephd
Mark, I am a long way from being an expert, but until one of the experts chips in, I ll say that the proportions don t sound right to me. I use 1 part 30% HCl,
Re: [Homebrew_PCBs] Etching Problem
2010-03-18 by DJ Delorie
By Fresh I meant how long since you d mixed them. As for amount, I mixed up four liters of etchant and just keep reusing it :-)
Re: [Homebrew_PCBs] Re: Using a home made CNC router for pcb milling?
2010-03-18 by Mark Lerman
It s a Model 7000S.
Re: [Homebrew_PCBs] Etching Problem
2010-03-18 by Mark Lerman
It s Claroxide 30, from a beauty supply, and should be fresh. Perhaps I m using too little - I used 30 cc water +30cc HCl +10cc H2O2 for a ds board that
Re: [Homebrew_PCBs] Re: Using a home made CNC router for pcb milling?
2010-03-18 by Mark Lerman
Whoops - I am in the metro NYC area - about 30 miles NW of NYC. I guess I could ship it, though it might be $75 or so, perhaps more. If I do ship it I would
Re: [Homebrew_PCBs] JAMECO "Etch Your Own Circuit Board" email
2010-03-18 by Harvey White
... I haven t, other than the standard drill collet. This one is pretty much dedicated to drilling PCB holes, although I can remove it easily. It s also going
Re: [Homebrew_PCBs] Re: Using a home made CNC router for pcb milling?
2010-03-18 by Kerry Wentworth
No. I should do that, though. One of these days. Kerry
Re: [Homebrew_PCBs] Re: Using a home made CNC router for pcb milling?
2010-03-18 by Erik Knise
Where are you located? ... Erik L. Knise Pacific Shipping Company Seattle, WA [Non-text portions of this message have been removed]
Re: [Homebrew_PCBs] Re: Using a home made CNC router for pcb milling?
2010-03-18 by kimvellore@sbcglobal.net
Mark, I would love to play with that toy I m putting my dibs on it. I am in CA, san jose Please PM me Thanks Kim Kim Sent via BlackBerry by AT&T ... From: Mark
Re: [Homebrew_PCBs] Etching Problem
2010-03-18 by DJ Delorie
Is the H2O2 fresh? It breaks down over time, a solution that s been mixed for a while won t have any H2O2 left in it, and HCl won t etch Cu without an
Re: [Homebrew_PCBs] Re: Using a home made CNC router for pcb milling?
2010-03-18 by Kerry Wentworth
That depends on how much junk you have around and how valuable your time time is. I built mine from an XY table my old boss gave me, a drawer slide with a
Re: [Homebrew_PCBs] Re: Using a home made CNC router for pcb milling?
2010-03-18 by Kim Vellore
Ken, I am in the same boat as you but according to my math odds of winning the lotto is close to the same even if you dont buy the ticket. Having said that you
Re: [Homebrew_PCBs] Re: Using a home made CNC router for pcb milling?
2010-03-18 by Erik Knise
Have you posted pictures of your rig anywhere? On Thu, Mar 18, 2010 at 9:30 AM, Kerry Wentworth
Re: [Homebrew_PCBs] Re: Using a home made CNC router for pcb milling?
2010-03-18 by Mark Lerman
I realize that this is not a commercial group, so I hope the following is not a violation of policy. I have an old T-Tech Quick Circuit that I will never use
Re: [Homebrew_PCBs] JAMECO "Etch Your Own Circuit Board" email
2010-03-18 by David Griffith
... What attachments have you tried? -- David Griffith dgriffi@cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is
[Homebrew_PCBs] Etching Problem
2010-03-18 by Mark Lerman
I am using HCl (31%) + H2O2 (30%) + water in the ratio of 3:1:3 at room temperature with manual agitation (rocking) to etch some boards, but I m having some
Re: Using a home made CNC router for pcb milling?
2010-03-18 by sailingto
Thank you for the response Mark - what you are saying is one of the reasons I ve been hesitate to invest much money/time in a homebrew CNC mill - concern it
Re: [Homebrew_PCBs] JAMECO "Etch Your Own Circuit Board" email
2010-03-18 by Harvey White
... I ll agree to this. I ve changed from dremel to Proxxon. Less runout, less noise, and better results when drilling holes (down to a #78 for vias). Harvey