441 LED oscilloscope

The project is finished. I've used an old television as the body. In this video I'm testing all the functions of the self-made oscilloscope and I compare them with the functions of a real oscilloscope. The whole oscilloscope is build with standard components. It's a straight system and there is NO microchip used. In addition you could say that it's an analogue oscilloscope instead of a digital one. The oscilloscope has two channels (for AC and DC signals).
In this video I'm testing:
- Time/DIV
- The slope
- Y-as adjustment on channel 1
- Y-as adjustment on channel 2
- Triggerlevel
- The inputcoupling on AC and DC by adding a DC-voltage with the generator.
- Triggering by adjusting the frequency down to a verry low frequency.
Thanks for watching.

[@JuddNiemann]

wow - you have obviously put a lot of work into this - very impressive

[@mreza84]

Great, awsome, keep the good work, A++++

[@nnilson2003]

excelente!!

[@helicoptered]

very good, surprised you used led's though, I wouldn't mind a scope myself, how long did it take you to build it?

[@willemsruben1]

Hmmm... I don't know :P The vertical lines in a square wave signal have a dv/dt of nearly zero with the result that you wont see the vertical lines anymore. However you will see the horizontal lines and you will be able to calculate the duty cicle of the PWM-signal. ;)
The chassis is indeed an old Phillips-television :D
Thank you for your reaction!

[@LoiraoCindy]

Hey man, any chance of you posting the schematics for this project??
Very best led scope i've seen so far! congratz!

[@shaikh2]

WOW!! Great work......
Could you please sharing the circuit diagram and part list........Thanks

[@helicoptered]

@willemsruben1 Nice work, have you ever built anything from tubes/valves.. especially soviet ones :)

[@willemsruben1]

@helicoptered It was for a school-project. All the time together... I think a month!

[@denizard]

wow ... awesome job !!... you could post the circuit of this project?

[@inversetfb]

good job anyways! very good indeed
After all common leds are remarkably slow, it would probably be meaningless to drive them much faster than you do.
I know leds designed for optical communications (such as those 650nm led for plastic optical fibers) can be much faster but thr human eyes still has to be able to collect enough light over the inverse of its cutoff frequency to see the signal clearly.

[@inversetfb]

I suppose updating the led display, say, 15 times per second, would be best. That requires high speed sampling, a configurable trigger, storing the data in an SRAM to display it later and so on

[@20jklm]

These days are finished with the project for a hypothetical oscilloscope using LED's, inspired by this and other videos circulating on youtube unfortunately first cost, and will not allow me to design it, and second I am unable to publish the vast majority of my work, I would like be more open but would cost me.

[@SkazaTV]

WHAT ICS ARE USED?

[@SkazaTV]

can i get the schematics?

[@amppower]

max frequency ?

[@george.b.]

I wouldn't say this is analogue. I mean, even if you used a bunch of comparators for the vertical axis, that's still A/D conversion.
Nice, nonetheless!

[@willemsruben1]

7kHz :P