Who wants a new printing HP-42s?

[Dave Frederickson]

(06-20-2017 03:35 PM)Dave Britten Wrote:  

(06-20-2017 02:05 PM)Luigi Vampa Wrote:  Just FYI, USB+BT+RS232 portable thermal printer just $31 (shipping included) from TAS.
Printing from Free42 could be really simple and cheap.

Dang, that's tempting. I'm not seeing RS-232 in the listing, though. Would be nice to have something like this for my 200LX, especially if it could do plain old Epson FX-80 or LaserJet emulation.

Even cheaper:
http://www.ebay.com/itm/GOOJPRT-QR203-58...2418906393
or
http://www.ebay.com/itm/JP-QR204-58mm-Mi...2418910118

[ziggurat29]

(06-20-2017 03:45 PM)Dave Frederickson Wrote:  

(06-20-2017 03:35 PM)Dave Britten Wrote:  Dang, that's tempting. I'm not seeing RS-232 in the listing, though. Would be nice to have...

Even cheaper:
http://www.ebay.com/itm/GOOJPRT-QR203-58...2418906393
or
http://www.ebay.com/itm/JP-QR204-58mm-Mi...2418910118

Ooh, nice finds. I may attempt this kooky IR adapter. (Hopefully that project won't induce grief....)
It will take a month for the parts to come off the slow boat from China. I might be able to do the software on a different board I have on-hand. I'll probably post the results on my hackaday.io....
OK, I did create a project page, if anyone has any curiousity https://hackaday.io/project/25616 . Parts will still take about a month, so it would probably be end-of-July-ish before it's truly done (if it works, but I'm pretty sure it will). I expect the parts to total about USD$30, and obviously it will be very homemade looking (i.e., I'm not going to bother with making a case for it), but someone else might find it fun to put together themselves. (No I'm not going into the printer biz).

[Luigi Vampa]

Even cheaper...
Portable USB+BT Printer only $24.99 @TAS

[ziggurat29]

FWIW, the printer cores came in from China last week, and I did manage to get the IR-to-receipt-printer adapter working and printing from my 28C. (Pictures and prose on the project link https://hackaday.io/project/25616, for the curious).

As mentioned, I am not going into the printer business; this was a side project for amusement. I do notice the Original Poster had considered doing some kickstarter or something. If he wants to do that and has any use for the code etc. I built here, he's welcome to it. In the end, the IR part was more straightforward than I expected, and the printer was more... obstreperous.

[Hsilop]

(06-13-2017 07:08 PM)Dave92F1 Wrote:  Byron Foster's method on the iPhone is much nicer (they should look at it!).

I'd like to have a look. Could you upload a screenshot?