Re: [Homebrew_PCBs] Re: White TRF [3 Attachments]
2016-07-11 by kabowers@...
... Last cleaning step; Wash the board off with 90+% alcohol, tilt the board and air dry. Either let it sit awhile or place in front of a fan. Keith Bowers
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Re: Hot PCB toner Transfer
2016-07-11 by AncelB
Hello again. I have hot toner transfer down to a fairly precise system. It s based on my modded Apache laminator:
Re: [Homebrew_PCBs] Re: White TRF
2016-07-11 by <n0tt1@...>
I ll throw this out there just in case..... Is the copper really clean? If water beads up on the copper *anywhere* the copper isn t clean enough for laser
Re: Hot PCB toner Transfer
2016-07-10 by duwaynes@...
When I do a board with Hot Toner Transfer I have always had better luck running the board through the Scotch laminator I use 3 times to preheat before I
Re: [Homebrew_PCBs] Hot PCB toner Transfer
2016-07-10 by Harvey White
... That is one reason that with a laminator, the board is run through multiple times. The first few are to heat the board. I have not seen (although I have
Re: White TRF
2016-07-10 by alienrelics@...
How are you cleaning the copper board? It should be cleaned with a good degreaser. You should be wearing rubber gloves, or at least wash your hands with
Hot PCB toner Transfer
2016-07-10 by pierreraymondrondelle
Gentlemen, I followed this thread for a while. As far as I remember, I didn t see any attempt to transfer the toner to a pre-heated PCB, just applying pressure
Re: [Homebrew_PCBs] Re: White TRF
2016-07-10 by Harvey White
... Massive pressure sounds wrong. You want the toner to be tacky. The pigment on the foil is very lightly attached. Run a sample of the foil attached to a
RE: [Homebrew_PCBs] Re: White TRF
2016-07-10 by Brad
Made another attempt with the TRF. massive pressure with my iron. But it still doesn t work - what is happening is the toner is bonding to the TRF and when
RE: [Homebrew_PCBs] overexposure
2016-07-10 by Boman33
Cristian, I might have missed the beginning of this thread but it sounds like you have a moving light source or moving the PCB. Depending on the UV source,
Re: [Homebrew_PCBs] overexposure
2016-07-09 by Cristian
... My concern was: is the overexposure negative or the UV coating will accept it? And how much. I ve got the answer. Cristian
Re: [Homebrew_PCBs] overexposure
2016-07-09 by Stefan Trethan
And what s around it? ST On Sat, Jul 9, 2016 at 5:22 PM, Cristian crissstian@rdslink.ro [Homebrew_PCBs]
Re: [Homebrew_PCBs] overexposure
2016-07-09 by Cristian
... I ll never under-expose. Is not possible. My problem is that at the beginning of a trace will be a little over-exposure. First the UV is ON and after a
Re: [Homebrew_PCBs] Toner
2016-07-09 by kabowers@...
... I try to keep a real HP cartridge just for pcb work and use other brands for general printing. My printer is a 1022. As someone else mentioned iron
RE: [Homebrew_PCBs] Toner
2016-07-08 by Brad
I’m using an HP 4250 with ‘reman’ toner and it seems to work mostly okay. Seems to be a matter of pressure with the iron and sufficient time to get it
Re: [Homebrew_PCBs] overexposure
2016-07-08 by DJ Delorie
Cristian crissstian@rdslink.ro [Homebrew_PCBs] ... No, that means if you re off by 100% from the sweet spot, you ll start having problems in some boards.
Re: [Homebrew_PCBs] Toner
2016-07-08 by Steve B.
Bob, There is definitely a difference in toner materials. I ve tried several different brands in my HP laserjet 2300 . I just use the factory HP cartridges now
Toner
2016-07-08 by Robert Nickels
I m having a heck of a time getting a decent transfer of toner from my HP laserjet 5000. I ve had good luck in the past with the Pulsar paper and am not
Re: [Homebrew_PCBs] overexposure
2016-07-07 by Cristian
... Thanks, dj. That means 100% overexposure-good news for me. I work to use a Blu Ray module with my CNC PCB milling machine (CCD2 made in Germany by
Re: [Homebrew_PCBs] overexposure
2016-07-07 by DJ Delorie
Cristian crissstian@rdslink.ro [Homebrew_PCBs] ... Along with it depends - some anecdotal information... When I was calibrating my UV box (get a
Re: [Homebrew_PCBs] overexposure
2016-07-07 by Cristian
... My question was about the amount (% or so) of the tolerated over-exposure (over the normal exposure), if available, not about how to determine the right
Re: [Homebrew_PCBs] overexposure
2016-07-07 by Stefan Trethan
Impossible to say, it depends on the opacity of your mask and how fine your traces are. Usually one does a step test, where a strip of mask is withdrawn or
overexposure
2016-07-07 by Cristian
How much overexposure (%?) can cope the UV sensitive coated PCB, please? Cristian
Re: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-07-04 by duwaynes@...
Correct it is not photo paper. It is much cheaper and it soaks off the board much easier than the photo papers I tried. Here is a link to what I use.
Re: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-07-04 by M phillis
Are we talking glossy finish but not photo quality? Thanks Mark On Monday, 4 July 2016, duwaynes@comcast.net [Homebrew_PCBs]
Re: DIY PCB with press and peel blue.
2016-07-04 by duwaynes@...
I use Hammermill Color Glossy Laser paper. About $15 for 300 sheets when I bought it last. DuWayne
Re: DIY PCB with press and peel blue.
2016-07-03 by goofy_36@...
Which brand of glossy laser paper did you end up using? Thanks David KG9BPM
Re: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-07-02 by duwaynes@...
I have tried glossy magazine paper and had inconsistent results. I always made sure I found pages that did not have any pictures on.them. Made it much
Re: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-07-02 by <n0tt1@...>
Guys, I ve always had a problem using magazine/printed papers.....my registration marks and most of the traces are VERY hard to see over the ink on the paper,
RE: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-07-01 by Tony Fishpool
Mark, by “media” do you mean paper? I use paper from Viking River Cruises brochures. They send them to me for free! This is a board I made for an Arduino
Re: [Homebrew_PCBs] DIY PCB with press and peel blue. [1 Attachment]
2016-07-01 by M phillis
Hi Tony Thanks for that. I ve made an offer close to the asking price. I m really hoping it proves better than the iron. What media do you use to transfer the
File - monthly.txt
2016-07-01 by Homebrew_PCBs@yahoogroups.com
Monthly Reminder for Homebrew_PCBs list, please read: Messages and threads: Please do NOT start a new thread by replying to another message. Even if you change
Re: [Homebrew_PCBs] Preferred orientation for each electrical connection ?
2016-06-30 by Harvey White
... On some of my projects, the power connector is symmetric (pin header). Center pin is ground, then the remaining pins duplicate the functions, so +5 gnd +5.
Re: [Homebrew_PCBs] Preferred orientation for each electrical connection ?
2016-06-30 by alan00463@...
Thank you to all who replied. Your advice helps. I had not considered polarized pin/header socket connectors. However, I will for future projects,
Re: [Homebrew_PCBs] Re: White TRF
2016-06-30 by Harvey White
... The laminator I use is a simple GBC creative laminator. It s probably an old model. What you might want is a laminator with a foil setting. You can try
RE: [Homebrew_PCBs] Re: White TRF
2016-06-30 by Brad
Okay. So yeah.. it just doesn’t work at all. Tried the laminator but the TRF wouldn’t stick (probably the laminator’s fault.. not hot enough). So then
RE: [Homebrew_PCBs] Re: White TRF
2016-06-29 by Marc OLANIE
Hi ... Nice info… could you provide any info or reference concerning this kind of foil ? Tnks ! Marc Hi ... Nice info… could you provide any info or
RE: [Homebrew_PCBs] White TRF
2016-06-29 by Brad
Thanks guys. Do you think I may have ruined the first sheet with having the iron on the dull side that first time? I tried again with max pressure, lots of
Re: [Homebrew_PCBs] White TRF
2016-06-29 by Steve B.
Dull side down. You have to use a laminator or a lot of pressure and hot iron. On Tue, Jun 28, 2016 at 7:47 PM, Brad unclefalter@yahoo.ca ... Dull side down.
Re: White TRF
2016-06-29 by AncelB
You don t need special TRF, all laser printer craft foiling is TRF. Never tired to iron on the foil though. A laminator pass is ideal, just let the laminator
Re: [Homebrew_PCBs] Preferred orientation for each electrical connection ?
2016-06-29 by Stefan Trethan
That s good advise, but in practice it is wishful thinking. In 99% of board-to-wire connectors the male pin side is on the PCB and the female socket side is on
RE: [Homebrew_PCBs] Preferred orientation for each electrical connection ?
2016-06-29 by Boman33
Good advice except I would wire the thermal fuse directly into the AC circuit together with the heater. That way even if the SSR fails the fuse will cut off
White TRF
2016-06-29 by Brad
I ve a question about White Toner Reactive Foil - I bought a couple pages from a local outfit. My understanding is you put the dull side of the sheet down on
RE: [Homebrew_PCBs] Preferred orientation for each electrical connection ?
2016-06-28 by keith printy
Most solid state relays I have need some form of heatsink . the thermal fuse only needs to interrupt power to the control board or the control signal to the
RE: [Homebrew_PCBs] Preferred orientation for each electrical connection ?
2016-06-28 by K5ESS
Whichever side of the mating connector pairs that has a voltage present when disconnected should be the most physically protected, usually the female (socket)
Re: [Homebrew_PCBs] Preferred orientation for each electrical connection ?
2016-06-28 by Brad Thompson
... Hello, Alan-- Standard procedure is to put sockets on any group of wires that carry hazardous voltages and thus could deliver a shock to an unwary person
Preferred orientation for each electrical connection ?
2016-06-28 by alan00463@...
I m making my first PCB for a thermostat for an electric heater. I need to connect the electronics to several outside components: - a thermistor that goes in
Re: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-06-28 by Tony Fishpool
Mark, I m UK based too. I got lucky with an EBay purchase of a used business grade laminator. It is the same model as this one..
Re: DIY PCB with press and peel blue.
2016-06-28 by AncelB
The laminator does not need any extra space, it runs forward/back all the time once instructed for a net 1/4 step forward each cycle. I have done boards down
Re: [Homebrew_PCBs] DIY PCB with press and peel blue.
2016-06-28 by M phillis
Some great advice here guys, I ll try anything to succeed as for me a nice DIY pcb. is a thing of buty. I m looking in to pressing with a laminator but have to