New file uploaded to Homebrew_PCBs
2016-11-06 by Homebrew_PCBs@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Homebrew_PCBs group. File :
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RE: [Homebrew_PCBs] DIY Gold Fingers?
2016-11-05 by keith printy
Silver can tarnish. I remember the days of the heathkit h9 video terminal and the chips having silver plating on their pins. They would have to be removed and
RE: [Homebrew_PCBs] Re: Where are my posts?
2016-11-05 by David C. Partridge
Apologies, I was posting the question to the wrong forum. I’ve no missings post on this on. Dave From: Homebrew_PCBs@yahoogroups.com
Re: [Homebrew_PCBs] DIY Gold Fingers?
2016-11-05 by duwaynes@...
I have used Cool Amp silver plating powder for contact on circuit boards with good luck. Cool-Amp http://www.cool-amp.com/cool_amp.html
Re: Where are my posts?
2016-11-04 by alienrelics@...
Every member is on moderation until they ve posted a few times. This is to keep spammers out. Also, your first two posts were replies to digests. Steve
Re: [Homebrew_PCBs] Re: DIY Gold Fingers? shim brass
2016-11-04 by Rob
I don t know what the need is for gold for your application but I have used shim brass as a heavy wear contact point to mate chassis to boards. Thin brass
Re: [Homebrew_PCBs] DIY Gold Fingers?
2016-11-04 by Jean-Paul Louis
If you can use low quality contacts, just use tin/lead or lead free solder (HASL) If you want reliability of your contact, flash gold is the only reliable
RE: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner rolling date back and page counts
2016-11-04 by Tony Smith
All these cartridge chips are the same, they’re just a memory chip on a I2C bus. 4 connections – power, ground, SDA (data) and SCLK (clock). If you put a
Re: DIY Gold Fingers?
2016-11-04 by yahoo@...
Hi Again, So it sounds like Gold is expensive, toxic, etc. Are there other approaches people have used if they want to make contacts (card edge fingers for
RE: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner rolling date back and page counts
2016-11-04 by yahoo@...
Hi All, I ve taken apart a couple of these printers for this purpose. There is no obvious battery (coin cell, etc) on the main logic board or the digital
Re: [Homebrew_PCBs] Where are my posts?
2016-11-04 by Donald H Locker
I get the impression Yahoo! may be having some problems. Many uploads to the LTspice group were failing yesterday. There may be other failures. This message
RE: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner rolling date back and page counts
2016-11-04 by Tony Smith
Appears to be that the cartridges die after 700 (?) pages, no date expiry. Apparently the best option is to fill up the starter cartridge, eg
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-11-04 by Harvey Altstadter
The computer can be the source of the date. Unless you change the default on Windows type computers, the computer time comes from the Internet, so if it is
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner rolling date back and page counts
2016-11-04 by Rob
Perhaps page counts will pop it at 700 pages as documented with the included starter toner cartridge. I m good with that number. Thats a long time for me to
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-11-04 by Rob
So HOW does it know 365 days? Where does it get the actual date to decide one year? Does it last for 10 years if you only turn on the power once every ten
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-11-04 by Rob
Whats up with all this speculation? clock..no clock.... battery... no battery...... saying ..:but it’ll be something like when you put in a new cartridge the
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-11-04 by Harvey Altstadter
They are doing worse. HP was downloading an update to their firmware that would prevent the printer from using third party ink carts. After some bad publicity,
RE: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-11-04 by Tony Smith
You can do it in the processor easily enough, but things tend to stop when the power is turned off. RTC chips are cheap (but still not free). A quick google
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-11-04 by Harvey Altstadter
No need for anything fancy, like a real time clock. The onboard processor in the printer only has to count seconds and store that info. When the appropriate
RE: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-11-04 by Tony Smith
Oh, some printers have a built-in clock complete with backup battery. Unlikely to be the case with this printer, that sort of thing add a few cents to
RE: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-11-04 by Tony Smith
Like I said, the printer gets the current date from your PC. If you roll the date back before using the printer then it may not disable the cartridge. That
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-11-04 by Rob
So..... WHERE does the printer get the CURRENT DATE from? and WHAT IF YOUR PC DATE WAS SET TO THE SAME DATE EVERY TIME YOU TURN IT ON? WHEN WOULD THE PRINTER
Where are my posts?
2016-11-04 by david.partridge@...
I posted twice already, no sign of the messages - am I on moderation? Dave
RE: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-11-04 by Tony Smith
It’s simpler than that. No idea of the exact scheme, but it’ll be something like when you put in a new cartridge the printer writes the current date & time
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-11-03 by g8kps@...
If there is a self destruct after one year then there must be a real time clock of some sort, if it s a clock chip then it should be possible to intercept the
File - monthly.txt
2016-11-01 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] Re: Pantum 2500 hack to direct print toner
2016-10-31 by Keith B
... MICR toner for checks.
RE: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-10-31 by Boman33
If I remember correctly there is also a magnetic toner to be able to print a magnetic barcode/ banking numbers on financial documents. Bertho From:
RE: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-10-30 by keith printy
Some toners have iron because the process uses a magnetic brush to deposit it on the drum . some others don’t because the iron filings are in the unit and
Re: [Homebrew_PCBs] Re: Iron In Toner?
2016-10-30 by Dennis Shelgren
From what I understand of the process, magnetic particles are standard. It s just the ratios are changed for different processes. Take apart a toner cartridge
Re: [Homebrew_PCBs] Re: Iron In Toner?
2016-10-30 by LEON HELLER
I worked for Rank Xerox (UK) many years ago. The original Xerox 1385 flat-bed machine was manually operated, and I remember seeing an app. note that described
Re: [Homebrew_PCBs] Re: Iron In Toner?
2016-10-30 by Roland Harriston
Hmmmmm.............. I think the Xerography concept was a lot more intricate than the static charge on a plastic bag. Regards, RFH
Re: [Homebrew_PCBs] Re: Iron In Toner?
2016-10-30 by Roland Harriston
DaveD: Thanks for the refresher information. Like you, it has been many, many moons since I was remotely associated with that kind of stuff, and that was
Re: [Homebrew_PCBs] Re: Iron In Toner?
2016-10-30 by Harvey Altstadter
Someone mentioned that he thought that the iron was a ferrite. Ferrites are ceramics, and as I understand it are insulators. My earlier comments about iron
Re: [Homebrew_PCBs] Re: Iron In Toner?
2016-10-30 by Dave Daniel
One could construct toner particles with iron to result in at least two different particle types: one, where the iron was completely coated with some sort of
Re: Iron In Toner?
2016-10-30 by alienrelics@...
Using electrostatics, you actually don t want conductivity through the material or it will all just equalize. Think of the last time you ve opened a box full
Re: [Homebrew_PCBs] Re: Iron In Toner?
2016-10-30 by Dave Daniel
Xerography is an electrostatic process, yes. I have not kept up with the processes used since the 90s, but it used to be that the toner was essentially very
Re: Iron In Toner?
2016-10-30 by Roland Harriston
Pardon Me: But isn t xerography or laser printing essentially an electrostatic process. It s been a long time since I read about it, so correct me if I am in
Re: Pantum 2500 hack to direct print toner
2016-10-30 by kbyrne10@...
Where can I go to learn about printing my own checks due to high costs of bank checks? I have a HP Laser Jet P2015dn, works good for toner transfer and
Re: Pantum 2500 hack to direct print toner
2016-10-30 by lbattraw@...
In reference to the idea of the toner having iron in it, I believe it s fairly common to find toner with iron. I saw an instructable (Or maybe it was a video
Re: [Homebrew_PCBs] Pantum 2500 hack to direct print toner
2016-10-30 by Harvey Altstadter
My point is that if one wanted to print whole pages with these cartridges, they would get many, as the claim for 1000 pages of MICR ink implies very little
Re: [Homebrew_PCBs] Pantum 2500 hack to direct print toner
2016-10-30 by Jean-Paul Louis
Harvey, The problem is not the number of pages, but the timing. After a year, your cartridge becomes obsolete according to the previous emails, even if you
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-10-29 by Harvey Altstadter
Just a thought. Printing 1000 pages of checks using MICR ink, doesn t amount to a lot of toner. I print my own checks on standard check forms, three checks to
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-10-29 by Rob
It sounds nefarious. Anyone selling refurbished $30 cartidges refilled with MICR Check toner has a niche market for check counterfeiting and is just looking to
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-10-29 by Harvey White
On 29 Oct 2016 06:00:22 -0700, you wrote: Nasty little trick in terms of the date stamp, it s a cheat and needs to be illegal. At any rate, the MCR cart is
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-10-29 by lbattraw@...
Unfortunately the cartridges are branded with the date when you put it into the printer, and after a year it will self-destruct no matter how much toner is
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-10-28 by Mark Lerman
If you re using it only to print pcbs, the starter toner will last a very long time. At 10:59 PM 10/27/2016, you wrote: The replacement toner cartridges hold a
Re: [Homebrew_PCBs] Pantum 2500 hack to direct print toner
2016-10-28 by mosaicmerc@...
This approach initially appears attractive, but if you need to turnaround and etch boards quickly, or need double sided boards done as I find common, then hot
Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
2016-10-28 by Rob
IS there a toner cartridge chip hack to defeat the page counter?
Re: Pantum 2500 hack to direct print toner
2016-10-28 by alienrelics@...
The replacement toner cartridges hold a lot more toner than the one that comes in the printer. This is very common, and has been for over a decade for both