I've not had time to play just yet but I am inpressed by the size of the display - I hadn't expected them to be so large. They should make a impressive clock, if I can work out how to make them look good. A quick power test shows it'll work down to 6V 250mA with reasonable brightness.
On Wed, Jan 14, 2026 at 11:18 PM Adrian Godwin <[email protected]> wrote: > Warning - ff-topic - talking about the POS7300 / FT-100108. Probably wants > its own thread. > > I got mine too. Impressed by delivery time and packaging. > It only pulls about 6W so could just about be sourced without PD, > > I've got as far as duplicating the vendor's video and trying demo mode but > there seem to be other less obvious options including nonvolatile > programming. What else have you figured out ? > > Any thoughts about CN1 ? JP1 ? > > > On Tue, Jan 13, 2026 at 12:47 PM David Pye <[email protected]> wrote: > >> Just got one of those exact displays, and having a play with it. >> >> A few things I can provide info-wise: >> >> 12V DC input to power it up and then it expects commands/data over RS232 >> to tell it what to display. There is an RJ45 to 9-pin D connector adaptor >> provided, but you need to feed 12V into that (or elsewhere on the PCB) so >> you can't just plug it into a USB serial dongle. >> >> I'm sketching up a PCB (mostly for my own amusement) to drive it as >> follows: >> >> USB-C PD module (£1 off amazon or aliexpress) to negotiate 12V from a >> suitable PD-compliant USB-C PSU >> RS232 transceiver IC to speak to the display >> DC-DC buck converter to source a 5V supply for the Pi Pico from the 12V >> PD input >> Raspberry Pi Pico W, which will allow you to connect to it as a USB >> serial device (via usb mini) and send commands >> The wireless functionality will also allow you to send data at it via >> either MQTT or Netcat (or something else I think of...!) >> >> Might also have some pin headers spare to allow connection of >> PIR/microwave presence sensor, or GPS module. >> >> I think that should allow it to be a fairly broadly multi-functional >> display or clock. When I get round to it, I'll publish all of the above >> on github, so if anyone wants to make any themselves, they can. >> >> Alternatively, any other ideas anyone has for features, I'd always >> welcome a good idea :-) >> >> (Alternatively, for the billy-basic rough and ready solution, you could: >> Supply display with 12V, speak upstream of the RS232 transceiver IC on the >> PCB via 3v3 UART, and it'd work...!) >> >> David >> >> >> On Tue, 13 Jan 2026 at 12:35, Tony Adams <[email protected]> wrote: >> >>> For anyone in the UK these appear similar, though serial rather than USB >>> so maybe a generation earlier. >>> >>> https://www.ebay.co.uk/itm/127038159566 >>> >>> No connection to the seller etc., just thought they might be of interest >>> to someone. >>> >>> On Tue, Jan 13, 2026 at 11:52 AM Tom Katt <[email protected]> wrote: >>> >>>> Forgot to mention - these are brand new old stock with Digikey >>>> packaging and require soldering pin headers on to the board, so they are >>>> not "plug & play" like the POS displays... >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "neonixie-l" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To view this discussion, visit >>>> https://groups.google.com/d/msgid/neonixie-l/97519123-4199-4dd5-9c21-6fdfdfff427en%40googlegroups.com >>>> <https://groups.google.com/d/msgid/neonixie-l/97519123-4199-4dd5-9c21-6fdfdfff427en%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "neonixie-l" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion, visit >>> https://groups.google.com/d/msgid/neonixie-l/CAF6QoKzZ5P%3DmPK65dBmVjW4i4uB2UNBCkb-e3bkVu1V9mC4aKg%40mail.gmail.com >>> <https://groups.google.com/d/msgid/neonixie-l/CAF6QoKzZ5P%3DmPK65dBmVjW4i4uB2UNBCkb-e3bkVu1V9mC4aKg%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "neonixie-l" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion, visit >> https://groups.google.com/d/msgid/neonixie-l/CAOQ6x0FaunK%2BAzqakd%3D7VY9i%3Dfa6yeEZnsRWrw1SOjWR%2BCxcBg%40mail.gmail.com >> <https://groups.google.com/d/msgid/neonixie-l/CAOQ6x0FaunK%2BAzqakd%3D7VY9i%3Dfa6yeEZnsRWrw1SOjWR%2BCxcBg%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion, visit > https://groups.google.com/d/msgid/neonixie-l/CALiMYrvU4iqXYizJzx%2B4VFcEuLy%2BsRFSdmPUPcFrCOjoSxaF6Q%40mail.gmail.com > <https://groups.google.com/d/msgid/neonixie-l/CALiMYrvU4iqXYizJzx%2B4VFcEuLy%2BsRFSdmPUPcFrCOjoSxaF6Q%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/CAF6QoKyfa%2BSjPrDaqzeKHbMDvnRMhQJaYqcAjspCyhOhV-2uUA%40mail.gmail.com.
