# Really basic oscilloscope
**URL:** https://forum.makecode.com/t/really-basic-oscilloscope/10806
**Category:** Show & Tell
**Created:** [November 9, 2021, 5:38pm UTC](https://forum.makecode.com/t/really-basic-oscilloscope/10806 "2021-11-09T17:38:03Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@paul](https://forum.makecode.com/u/paul)
#### Post date: [November 9, 2021, 5:38pm UTC](https://forum.makecode.com/t/really-basic-oscilloscope/10806/1 "2021-11-09T17:38:03Z")
Just for fun - probably not a substitute for spending a thousand dollars on a real one. Zoom into waveforms, being read from the Meowbit pins.
> **[osc](https://arcade.makecode.com/40726-26979-11662-36131)**
>
> Made with ❤️ in Microsoft MakeCode Arcade.
> **[GitHub - paulconnell/osc: A MakeCode project](https://github.com/paulconnell/osc)**
>
> A MakeCode project. Contribute to paulconnell/osc development by creating an account on GitHub.
Brief video showing it reading a 0-3.3V signal twiddling a potentiometer.
> **[Makecode Arcade Meowbit oscilloscope](https://www.youtube.com/shorts/qnqJk1KiLL8)**
up/down buttons change the y-scale
left-right buttons change the x-scale
A/B buttons offset the wave up and down the screen
By default it’s in ‘simulation’ mode where you can look at a precalculated sine wave, if you don’t have a circuit to actually connect to the pins or you don’t want to.
Press Menu to begin reading voltage on pin 0 instead.
Tie GND to ground otherwise you’ll get floating voltage noise probably.
ENSURE the voltage is only in the 0-3.3V range. You will probably harm your device if you don’t.
---
### Author:  [@paul](https://forum.makecode.com/u/paul)
#### Post date: [November 9, 2021, 8:41pm UTC](https://forum.makecode.com/t/really-basic-oscilloscope/10806/2 "2021-11-09T20:41:08Z")
The sampling is pretty poor btw. It completely suspends sampling the voltage while it renders, so it’s glitchy when cycles repeat. It was only a quick hack to show the kids what a ‘bouncy’ push button looks like, and to show voltage sweeping with the potentiometer. Might try and make it a bit smarter some time, sampling in a background thread, that kind of thing.
---
### Author:  [@randomuser](https://forum.makecode.com/u/randomuser)
#### Post date: [November 15, 2022, 5:45pm UTC](https://forum.makecode.com/t/really-basic-oscilloscope/10806/3 "2022-11-15T17:45:19Z")
I don’t know what an oscilliscope is but it was very fun to play with and cool visuals!
---
### Author:  [@isoffline](https://forum.makecode.com/u/isoffline)
#### Post date: [November 15, 2022, 11:22pm UTC](https://forum.makecode.com/t/really-basic-oscilloscope/10806/4 "2022-11-15T23:22:48Z")
well its basically wait im dumb nevermind