i’d check the list of hardware supported by sigrok and see if any of it is cheap enough, then you could use a PC for the display which would be much more conven

i’d check the list of hardware supported by sigrok and see if any of it is cheap enough, then you could use a PC for the display which would be much more convenient. something like the labjack u3 would probably suffice with a bit of signal conditioning. (and learning how to do that would be way more educational and relevant than snapping together a no-solder kit.)