I just published something very similar to what you are looking for - although it uses a Microchip dsPIC, not an Arduino - the dsPIC is much faster and has much better ADCs and analog features. It uses the PC to display the data.
considering the arduino has got a visciously bad adc already - (granted you could interface with an accurate adc and import the data) - if you get that complex it makes more sense to have a real processor to begin with.
Oh yea, not really arguing, but you could try and get a quart in a pint pot. As an exercise, sticking a decent SPI ADC on it would help immensely, but you wouldn't build a serious scope out of a TV anyway, for obvious reasons
actually, doesn't have to be tooooo accurate, maybe just like 2-3 khz is all I need, and is just for seeing waveforms, doesn't need to be too precise-I want to know I am getting a sine and not a square, but don't care of the frequency.
Discussions
8 years ago
For future reference I'm posting this link to an arduino based 140khz TVout oscilloscope. You have to log in to the forum to get the sketch and stuff.
9 years ago
Thanks everyone, I actually became "un-cheap" and bought myself a 100 dollar oscilloscope off the interwebs
10 years ago
I just published something very similar to what you are looking for - although it uses a Microchip dsPIC, not an Arduino - the dsPIC is much faster and has much better ADCs and analog features. It uses the PC to display the data.
The instructable is here:
https://www.instructables.com/id/DPScope-Build-Your-Own-USBPC-Based-Oscilloscope/
The scope webpage is here:
http://www.dpscope.com
10 years ago
An arduino doesn't have the power to run as an oscilloscope of any quality- nor does it have the power to output virtually anything to a tv...
basically, no.
Answer 10 years ago
Well the processor might, in assembler.
Steve
Answer 10 years ago
considering the arduino has got a visciously bad adc already - (granted you could interface with an accurate adc and import the data) - if you get that complex it makes more sense to have a real processor to begin with.
Answer 10 years ago
Oh yea, not really arguing, but you could try and get a quart in a pint pot. As an exercise, sticking a decent SPI ADC on it would help immensely, but you wouldn't build a serious scope out of a TV anyway, for obvious reasons
Answer 10 years ago
actually, doesn't have to be tooooo accurate, maybe just like 2-3 khz is all I need, and is just for seeing waveforms, doesn't need to be too precise-I want to know I am getting a sine and not a square, but don't care of the frequency.
Answer 10 years ago
Doing it with a stock Arduino is VERY unlikely.
Here's an Analogue method
www.dansworkshop.com/electricity-and-electronics/homebuilt-oscilloscope.htm