Re: sluggish etchant
2008-06-19 by Joe
Hi, Your ratio is right. but, dont add anymore peroxide. Remember, peroxide is mostly water, and that will stall the etching. The best way to tell what you
Messages
Browse messages
Page 297 of 707 · 35337 messages matched
Re: photomask shortcuts
2008-06-19 by Joe
Hello, your developer should be 9:1 ratio. 9 parts warm water to 1 part developer. How i do it, when Im burning the image, I have the developer in its tub
Brass etching
2008-06-19 by Russell Shaw
Some impressive stuff here;) http://steampunkworkshop.com/jules-vernian-analog-synthesizer Play the utube down the bottom for some coool sci-fi sound effects.
Re: [Homebrew_PCBs] UV LED box
2008-06-19 by Markus Zingg
Intersting finding. I never could observe this! Might depend on the kind of make/modell of the restist itself? Markus Adam Seychell schrieb: [snip]
Re: [Homebrew_PCBs] UV LED box
2008-06-19 by DJ Delorie
... Yes. So, my first exposure was step 5 at 2 min and I wanted to get to step 8 (three steps), so I multiplied 2 min * 1.4 * 1.4 * 1.4 = 5.5 min. ... Math,
Re: [Homebrew_PCBs] sluggish etchant
2008-06-19 by DJ Delorie
... The jar says warning: contains sodium hydroxide . It s pure lye. It dissolved, it just didn t dissolve *immediately*. Most did, but there was some
Re: [Homebrew_PCBs] sluggish etchant
2008-06-19 by Adam Seychell
... NaOH should dissolve in
Re: [Homebrew_PCBs] UV LED box
2008-06-19 by Adam Seychell
... Thank for getting back to us. I m bit new to these step gauges. I ordered mine yesterday. I also got Stouffer $11 Transmission Resolution Guide to make the
Re: [Homebrew_PCBs] sluggish etchant
2008-06-18 by DJ Delorie
... Follow-up: CuCl concentration is below 1.2 (which I figured). Acid seems high enough. I heated some copper wire to get Copper Oxides, and the etchant
Re: [Homebrew_PCBs] Re: Canon inkjet PCB direct print is possible?
2008-06-18 by kabowers@NorthState.net
... Take a look at thest folks. IIRC they offer pigmented ink for all sorts of printers. http://www.inkproducts.com/
Re: [Homebrew_PCBs] sluggish etchant
2008-06-18 by Stefan Trethan
The problem with air bubbling is that you need enough CuCl in there to finish the board (and then some). Otherwise you d need to re-generate during etching,
Re: Canon inkjet PCB direct print is possible?
2008-06-18 by warrenbrayshaw
... Has it been confirmed that this is true? To date all success has been achieved with the Epson because of the pigment inks. Some Canon have a black pigment
Re: [Homebrew_PCBs] Canon inkjet PCB direct print is possible?
2008-06-17 by Myc Holmes
The printer must have a piezo type printhead, not a thermal type. The piezo pushes out droplets of ink by mechanical methods, the thermal boils a small portion
Re: [Homebrew_PCBs] sluggish etchant
2008-06-17 by Herbert E. Plett
the bubbler running will provide for some of the needed O2. perhaps a little more HCl is needed, it also fumes out...
Re: [Homebrew_PCBs] sluggish etchant
2008-06-17 by Leon
... From: DJ Delorie To: Sent: Tuesday, June 17, 2008 8:52 PM Subject: Re: [Homebrew_PCBs] sluggish etchant
Re: [Homebrew_PCBs] sluggish etchant
2008-06-17 by DJ Delorie
... It was the usual 2 parts 3% H2O2 to 1 part 37% HCl. But like I said, it s been sitting for a while.
Re: [Homebrew_PCBs] sluggish etchant
2008-06-17 by Leon
... From: DJ Delorie To: Sent: Tuesday, June 17, 2008 8:19 PM Subject: [Homebrew_PCBs] sluggish etchant ...
sluggish etchant
2008-06-17 by DJ Delorie
I ve got a somewhat new tank of HCl etchant that I ve used a few times, but it s mostly been sitting for a while. It s only pale green, but it s emerald not
Re: [Homebrew_PCBs] UV LED box
2008-06-17 by DJ Delorie
... Just finished some tests. With the glass and transparency I m using, it needs 5.5 minutes of exposure to hit 8 on the step gauge. That s with a ~5 inch
Re: [Homebrew_PCBs] Re: Exposure timer
2008-06-17 by Leon
... From: Howard To: Sent: Tuesday, June 17, 2008 6:26 PM Subject: [Homebrew_PCBs] Re: Exposure timer
Re: Exposure timer
2008-06-17 by Howard
... doesn t ... Hi So hows it going with the Exposure timer ? You got it sorted now ? Howard
Canon inkjet PCB direct print is possible?
2008-06-17 by tinix84
hi everybody! i have a Canon bjc3000 inkjet printer an I would like to hack it to make a direct pcb printer.. Is it possible as people do with epson printer?
Re: [Homebrew_PCBs] Re: photomask shortcuts
2008-06-16 by Herbert E. Plett
hey guys.... did you notice that you left SIX levels of previous messages? is that necessary to make your point? ... ...
Re: photomask shortcuts
2008-06-16 by javaguy11111
... It is Dupont Riston. It is a dry film negative actiing resist.
Re: [Homebrew_PCBs] Re: photomask shortcuts
2008-06-16 by Leon
... From: javaguy11111 To: Sent: Monday, June 16, 2008 5:22 AM Subject: [Homebrew_PCBs] Re:
Re: photomask shortcuts
2008-06-16 by javaguy11111
... optimal ... time-between-discards ... about 12 ... much more ... A more ... Actually the datasheet for the resist recommends that you do not use NaOH for
Re: photomask shortcuts
2008-06-16 by javaguy11111
... optimal from a cost point of view, but I m thinking of time-between-discards ... In the tests I have done so far, I have not used exact measurements. For
Re: [Homebrew_PCBs] photomask shortcuts
2008-06-16 by Leon
... From: DJ Delorie To: Sent: Monday, June 16, 2008 4:26 AM Subject: Re: [Homebrew_PCBs] photomask
Re: [Homebrew_PCBs] photomask shortcuts
2008-06-16 by DJ Delorie
... Whatever samples javaguy is selling - http://www.pcbhobbyist.com/ ... Same film as above ;-) ... It s a vertical container (like a bubble-up etch tank), so
Re: [Homebrew_PCBs] photomask shortcuts
2008-06-16 by Leon
... From: DJ Delorie To: Sent: Monday, June 16, 2008 3:50 AM Subject: [Homebrew_PCBs] photomask shortcuts
photomask shortcuts
2008-06-16 by DJ Delorie
I ve tweaked my UV box to even out the intensity (somewhat, not 100% perfect but good enough). I m ready to actually use it now :-) I ve got some questions
Re: photoresist sensibility chart ref UV wavelength - PCB LDI using a PS3 diode
2008-06-13 by dandumit
warrenbrayshaw - Thanks ! indeed the article is very close to what I was searching. It seems that the peak sensitivity is around 370 nm and some resists are
Re: Searching for keyboard like pcb
2008-06-13 by Dave Miller
... Try Sheldahl, http://www.sheldahl.com/ You can get a variety of substrates.
Re: photoresist sensibility chart ref UV wavelength - PCB LDI using a PS3 diode
2008-06-12 by warrenbrayshaw
The following article may be of interest http://www.circuitree.com/Articles/Column/18623649067d7010VgnVCM100000f932a8c0____
Searching for keyboard like pcb
2008-06-12 by jeromedecock
Hello, I am searching the name of this kind of pcb that they use for computer keyboards, it is flexible and transparent with brown/grey traces. I am searching
Re: [Homebrew_PCBs] photoresist sensibility chart ref UV wavelength - PCB LDI using a PS3 diode
2008-06-12 by Markus Zingg
IMHO it should work, but you are aware that you would have to expose every pixel for quite a while with the beam and thus the overal exposing time would be
Re: [Homebrew_PCBs] photoresist sensibility chart ref UV wavelength - PCB LDI using a PS3 diode
2008-06-12 by Cristian
It is OK. Cristian ... [Non-text portions of this message have been removed]
photoresist sensibility chart ref UV wavelength - PCB LDI using a PS3 diode
2008-06-12 by dandumit
Hi, Does anybody has access to the sensibility chart related to wavelength of exposing light source ? I would like to know if a KES-400AAA PS3 laser module
Re: [Homebrew_PCBs] UV LED box
2008-06-12 by DJ Delorie
... Yes, that s what I got. If you want *calibrated* the cost starts going up fast. ... Except that all the films I ve seen are calibrated against that very
Re: [Homebrew_PCBs] UV LED box
2008-06-12 by Adam Seychell
... $7 !, damn last time I priced a step gauge I was quoted some exorbitant number like AU$150. I m pretty sure me and the sales guy on the phone were talking
Re: How to mask bottom layer from etching?
2008-06-12 by warrenbrayshaw
Another product you could try is bituminous paint. I used this as a Ferric Chloride etch resist way back before obtaining my first Dalo pen. It comes off very
Re: [Homebrew_PCBs] Re: UV LED box
2008-06-12 by DJ Delorie
... I used 13/64, which is 0.2031 inches. If I have to buy a drill bit anyway, I might as well buy a metric one.
Re: [Homebrew_PCBs] Re: UV LED box
2008-06-12 by Jan Kok
5mm is .1969 inches, and a #8 drill is .1990 inches. If you glue the LED leads to your plywood board with some hot glue, that might hold well enough to allow
Re: [Homebrew_PCBs] Digest Number 2503
2008-06-12 by DJ Delorie
... Distance is actually further than optimal by 25% or so. It s aim that s the problem here, I ve since lit up individual LEDs to see, and some are off by
Re: [Homebrew_PCBs] Digest Number 2503
2008-06-12 by Donald H Locker
A little slow on the reply, because I m on digest, but it looks to me like you laid your LEDs out perfectly. The overlapping circles on the backside should
Re: [Homebrew_PCBs] UV LED box
2008-06-12 by DJ Delorie
... Or just expose it with a step gauge and read the step number. The film says what step number it needs, just expose once and adjust the exposure according
Re: [Homebrew_PCBs] UV LED box
2008-06-11 by Adam Seychell
... Thanks. I got 400 of the BestHongKong LEDs and got 0% failure. The ultra cheap brand I got 100 LEDs and 1 showed
Re: [Homebrew_PCBs] Re: How to mask bottom layer from etching?
2008-06-11 by Leon
... From: lnphoenix To: Sent: Wednesday, June 11, 2008 8:26 PM Subject: [Homebrew_PCBs] Re: How to mask
Re: [Homebrew_PCBs] Re: How to mask bottom layer from etching?
2008-06-11 by Stefan Trethan
rub it down firmly with a cloth, for example. Of course it is best to clean the copper first. ST
Re: How to mask bottom layer from etching?
2008-06-11 by lnphoenix
Thanks guys for your inputs. I probably would try the adhesive tape first and also the lacquer method later to see which one is best fit for my situation. BTW,