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.
