i am not in favour of CRT. while that would be a reasonable approach in the past, this technology is obsolete and therefore not worth spending time on unless one is interested in building it for retro effect.

It is much simpler to use one of open source projects built around current technology. then supplying spare units or making units in volume (if needed) is not a problem.

LCD displays are everywhere and there are plenty of sizes and specs to choose from. most of them are built around couple of chipsets so code to drive them is common and probably ready to use. Reading analogue signal at 1kHz is not much of a challenge. 10-12bit resolution is more than plenty (top DSOs use the same). wiring is dead simple - the entire unit will need just couple of wires and ready to use modules: display, MCU development kit, voltage divider and power supply (such as USB PSU).

https://www.instructables.com/PiScope-Raspberry-Pi-based-Oscilloscope/
https://www.instructables.com/Graphical-Current-Analyzer-With-Adjustable-Voltage/
https://www.instructables.com/Make-an-Oscilloscope-Using-the-SainSmart-Mega2560-
https://www.instructables.com/How-to-Make-a-25-Oscilloscope/
https://www.instructables.com/Build-Your-Own-Arduino-Nano-Based-DIY-Oscilloscope

Fleascope is a unit that uses browser on mobile phone as UI.
https://www.elecrow.com/flea-scopet...Z8Du-M857SqmknhOXYFTO5Q0NXDXYsjY8h2ZmNICqA62S

thak you

 

thak you

dothe kits "Wake up" at a preset value?

 

When I get back to homebase I will check how the DSO138 powers up.

 

i do not know but many of those projects include source. that makes it easy to make modification would let it start with preferred settings, or last used settings...

i was thinking about doing the same thing later on this year. i am thinking of using 2.4" display and RP2040 zero, which is small, dirt cheap, with plenty of memory and reasonably fast (much faster than ArduinoUno etc).

 

do the kits "Wake up" at a preset value?

I have a DSO Shell digital scope (not a kit) and it does hold the settings when powered OFF.
Scope