In article ,
says...

For a real low cost solution you can use the computer's audio card and
free softwa

https://listoffreeware.com/best-free...tware-windows/


20 years ago or so Radio Shack had an o-scope probe to use with a
computer. The frequency range was limited by the processing power of the
day but it was handy for some things.



For around $ 200 to $ 300 Hantek makes some very good scopes. I have
one of them I bought several years ago. It is a 200 MHz version. I was
told at the time by several that the Hantek was the better one, but the
Rigol is also very good for the money.

I don't know if it is just hype, but some sources say to get one that is
sold in the US instead of ordering from China. Suppose to be a better
quality for the same model.

http://www.hantek.com/




Rigol is another China brand that has a good reputation for the same
price range.


https://www.rigolna.com/products/dig...loscopes/1000/