Re: [Homebrew_PCBs] Re: Trying to layout a PCB; do you use LTSPICE then PCB SW?
2010-06-22 by Donald H Locker
My first recommendation would be to check out the LTSpice Yahoo! group There are a huge number of libraries, example
Messages
Browse messages
Page 190 of 707 · 35337 messages matched
Re: [Homebrew_PCBs] Re: Trying to layout a PCB; do you use LTSPICE then PCB SW?
2010-06-22 by Leon Heller
... The Pulsonix PCB software I use has an integrated SPICE engine, but I very rarely use it. It requires that I use special SPICE parts instead of the usual
Re: Trying to layout a PCB; do you use LTSPICE then PCB SW?
2010-06-21 by Andrew
Donald, Do you happen to know of a good tutorial on using LTSpice or another SPICE software? I tried messing around with this about 3 years ago, and didn t get
Re: [Homebrew_PCBs] Re: Trying to layout a PCB; do you use LTSPICE then PCB SW?
2010-06-21 by Donald H Locker
I ve been doing more simulation lately. Quicker than breadboard and the smoke stays inside the monitor. I like LTSpice a lot, so I ll enter a schematic in
Re: [Homebrew_PCBs] CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by Frank Collingwood
Use a plotter, and have phototools made using a bromide camera.
Re: [Homebrew_PCBs] CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by Dale J. Chatham
Not an uncommon problem. Registration on the cheaper laser printers can be terrible. Find some fine graph paper on the net and print two pages. Hold them
Re: Trying to layout a PCB; do you use LTSPICE then PCB SW?
2010-06-21 by Frank P
Leon, In looking at the KiCAD webpage (http://www.lis.inpg.fr/realise_au_lis/kicad/), it says: With the schematic entry, you can: * Create simple or
Re: 35% H2O2 and HCL - Ratio?
2010-06-21 by sailingto
... Thank you for the 50 mil trace info - that s about what I use myself, unless it s larger..... all depending on room. Why waste all that space if it s not
Re: [Homebrew_PCBs] Re: CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by Slavko Kocjancic
Hello... I m make PCB with toner transfer quite long. It work s so well... And I can make PCB for small QFP with 0.8 or 0.5mm grid without problems. I didn t
Re: [Homebrew_PCBs] Re: CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by Leon Heller
... I use an HP 5940 DeskJet (it cost me about £60 five years ago) with Mega Electronics JetStar Premium film. Resolution is 1200 dpi. I d never go back to a
Re: [Homebrew_PCBs] CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by Slavko Kocjancic
... All are set to 100% The 0.5% shrinkage is probably caused by moisture in paper. But the nonconsistent error can t be result of moisture. As I already say I
Re: CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by boombox666
Dear Roger, I have no idea what material is used for the transparencies. Some kind of high temperature plastic that is for sure as the sheets are quite hot
Re: [Homebrew_PCBs] Trying to layout a PCB; do you use LTSPICE then PCB SW?
2010-06-21 by Leon Heller
... You only need SPICE if you want to simulate an analogue circuit you are using. Otherwise, just create a schematic and lay out the PCB. Leon -- Leon Heller
Re: CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by boombox666
... There are no stupid questions :-). But yes, in eagle CAD (the program I use for PCB design) everything is setup at 1 to 1 output. Checked and checked again
Re: [Homebrew_PCBs] CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by kabowers@NorthState.net
... I apologize if this is a dumb question, but do you have every stage of the print stream set to 100%. In the past I have goofed and had fit to page
Re: CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by pr0pert
Boobbox666, since you are asking for suggestions, this comes to mind. You might want to check on what material the transparency is made of. You may want to
Re: CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by boombox666
Dear Leon, What kind of accuracy do you get? What printer do you use? On what paper? How do you deal with transparency of the inkjet ink? What resolution are
Re: CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by boombox666
Dear Andrew, I have tried some positions on the transparencies. Seems that the edges are the most inaccurate. The centre portion of the sheet is the most
Re: [Homebrew_PCBs] Trying to layout a PCB; do you use LTSPICE then PCB SW?
2010-06-21 by Andrew Villeneuve
I build my circuit on a solderless breadboard before designing the PCB (I use EagleCAD). Then I see the problems before doing any of the layout. If you ve got
Re: [Homebrew_PCBs] CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by Erik Knise
... I have an HP Photosmart 8250. I haven t made any transparencies for PCB s but I ve printed a lot for my brothers silk screening business. They come out
Re: [Homebrew_PCBs] CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by Slavko Kocjancic
I m print grid over entire page. The error is randomly spread over entire lenght of paper. ..and near same amount with print on thick or thin paper. .. just
Trying to layout a PCB; do you use LTSPICE then PCB SW?
2010-06-21 by Frank P
In trying to layout a PCB, do you guys use LTSPICE to perform a simulation first? Then proceed to use a PCB layout software like KiCAD/FreePCB (after
Re: [Homebrew_PCBs] CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by Andrew Villeneuve
Does the widening only happen near the side of the paper that feeds in? I d be curious if you got better results by moving the pattern to the bottom edge of
Re: [Homebrew_PCBs] CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by Leon Heller
... I get very accurate transparencies with a cheap HP inkjet printer. Did you use a laser printer? They aren t very accurate. Leon -- Leon Heller G1HSM
Re: [Homebrew_PCBs] CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by Slavko Kocjancic
... I have same problem. Laserjet 1020 printer. The output in X is ok but on Y axis is terrible. Near all time is shorter by aprox 0.5% but two same prints
CNC drill holes and laser printer output, they do not align. Suggestions?
2010-06-21 by boombox666
Hello everybody, Just this weekend I finished up my CNC drill robot and it is happily drilling away. After checking positional accuracy and axis alignment I am
Re: [Homebrew_PCBs] Re: 35% H2O2 and HCL - Ratio?
2010-06-21 by Slavko Kocjancic
... Try with just of half of H2O2 (it s here to act as the accelerator) and when you see copper etched immideatly remove board out of solution and rinse it
Re: [Homebrew_PCBs] Re: 35% H2O2 and HCL - Ratio?
2010-06-21 by Stefan Trethan
The stock pads are meant for throughhole plated boards. The plating holds two fairly small restrings together reasonably well. For single sided they are way
Re: 35% H2O2 and HCL - Ratio?
2010-06-21 by msilv3r
Thanks for the response guys. I just redid both the tracks and the pads. I was able to modify both in Eagle. I m going to try it again early this week with a
Re: [Homebrew_PCBs] Re: 35% H2O2 and HCL - Ratio?
2010-06-21 by Piers Goodhew
Yes, I ve taken to putting some extra annulus on them and, of course, going SMD when and wherever possible.. PG ... [Non-text portions of this message have
Re: 35% H2O2 and HCL - Ratio?
2010-06-21 by sailingto
... Doesn t matter which program used for the layout, most of them do have pretty small pads. These small pads are ok for a commercial board with solder mask,
Re: [Homebrew_PCBs] Re: 35% H2O2 and HCL - Ratio?
2010-06-21 by Piers Goodhew
I ve certainly had little trouble with 10mil traces (0.010 inch) out of Eagle with Ammonium Persulphate - I do find Eagle s square through-hole pads a bit
Re: [Homebrew_PCBs] Re: 35% H2O2 and HCL - Ratio?
2010-06-21 by Donald H Locker
The program generating the tracks won t change the etch results. Try a more dilute etchant, make sure the toner is well and truly bonded to the copper
Free Re: For sale - convection toaster oven
2010-06-21 by alienrelics
How about free? I d like to get it out of my way, and I d rather see it go to a member of the list. I m in Tacoma, WA, respond off list if you d like it. Don t
Re: 35% H2O2 and HCL - Ratio?
2010-06-20 by msilv3r
Thanks JP. I m going to redo the tracks in Eagle and try it again. To get the thermal transfer I used this paper from DigiKey:
Re: 35% H2O2 and HCL - Ratio?
2010-06-20 by jp.gleyzes
Hi, The tracks were really small... and may be you let the etching too long time ? By the way, how did you succeed in having such a beautiful transfer ? I have
Re: 35% H2O2 and HCL - Ratio?
2010-06-20 by msilv3r
Thanks Slavko. I just did it and it certainly etched the copper well. A little too well. I thought the transfer looked great. However the etch took off the
Re: [Homebrew_PCBs] 35% H2O2 and HCL - Ratio?
2010-06-20 by Donald H Locker
Sorry I m late responding. I think those ratios sound OK (though I d probably use less H2O2, maybe 2H2O, 1H2O2, 2HCl,) but I would do water first, then H2O2,
Re: [Homebrew_PCBs] 35% H2O2 and HCL - Ratio?
2010-06-20 by Slavko Kocjancic
... Just use 1:1:1 ratio and should be ok. If HCl is diluted just little longer etching time will be. Pour watter into bowl after that HCl and last H2O2. You
A good toner transfer paper from Office Depot
2010-06-20 by Chris
Hi folks, I have been out of good paper for a while now and have tried a variety of different ink-jet photo papers (wasting a substantial amount of money).
Re: 35% H2O2 and HCL - Ratio?
2010-06-19 by alienrelics
That s strange, I m on Digest and I can see a subject line on his original message. It had a subject line when I approved it. I m looking at it on the group
Re: 35% H2O2 and HCL - Ratio?
2010-06-18 by msilv3r
Thanks Jan. It s legit and I don t know how that happened. When I hit post all that info is already filled in for me. When I said new to this I meant
35% H2O2 and HCL - Ratio?
2010-06-18 by Jan Kok
No idea why this message got sent out with empty From, Subject and To fields, but it looks like a legitimate message, so I m forwarding it with the original
35% H2O2 and HCL - Ratio?
2010-06-18 by msilv3r
Hi. I m new to this. I recently got some H202 and HCL from a chemical company. The H2O2 is 35%. I m not sure what percentage the HCL is, however it s labeled
For sale - convection toaster oven
2010-06-17 by Steve Greenfield
OK, normally I wouldn t allow selling small appliances here. I was going to build or buy a temperature control for this to use as a soldering oven ala the
Today's brass stencil results
2010-06-17 by DJ Delorie
Ran out of aluminum foil, decided to try brass etching again (for a solder paste stencil). Came out pretty good, so I figured I d share some thoughts. I used
Alternative to Benzotriazole
2010-06-17 by jcarlosmor
Hi, does anyone knows about other OSPs in the market with minimal health impact? Please do not reply send your PCBs designs to a PCB shop to be manufactured .
Re: PCB cutter
2010-06-17 by Andrew
Adam, very nicely done. Your slider and alignment jig are especially well done.
Re: Micromark drill press
2010-06-17 by Andrew
Be aware that WD-40 does not provide long-term lubrication. It is designed primarily to displace water (hence the WD part of the name) and to evaporate. If you
Re: [Homebrew_PCBs] Re: Micromark drill press
2010-06-17 by Slavko Kocjancic
... .. but you need to slow down feed.