convert two analogue pulses (5000/second) for display on HDMI or Composite Video

[charliecoutas]

Has anybody ever used a PIC to read two analogue signals and then display them on a screen like an oscilloscope? The old 'scope we use to show Colossus paper tape reader output is on its last legs. I'm sure somebody has done this before?

Charlie

[John Lawton]

Hi Charlie,

what would be the rise/fall times for the Colossus tape reader signals?

I would have thought that the easiest solution would be to use one of those handheld battery oscilloscopes, low bandwidth ones are really inexpensive on Amazon etc.

Of course you might want to roll your own, in which case I can't help, sorry.

John

[charliecoutas]

Hi John

Thanks for replying. I hadn't thought of that: the cheap hand-held jobbies. I'll look into it.
The risetimes are around 20uS. There is no need for it to be real-time, a few mS delay wouldn't be noticed. It was one of our engineers (ex Post Office Eng) who suggested that I might be able to use an old flat-screen telly.

I wouldn't be surprised if Les has something?

Best regards
Charlie