12
votes
2answers
668 views

Hobby oscilloscope based on AVR. How to remove op-amp noise?

I'm building a hobby oscilloscope on an ATmega16 microcontroller. The main problem is that I receive a large amount of noise while measuring the signal. I used LF353 amplifiers to shift voltage and I ...
1
vote
1answer
237 views

op-amp + ADC slow reaction

I have the following schematics: If I have a scope probe on VIN, everything works very well. VIN is an amplification of the input and the ADC reports it very well: good accuracy and no delay. But ...
7
votes
2answers
1k views

Bluetooth simple oscilloscope

I was thinking to make a simple oscilloscope which can measure at least 2MHz signals, that would be enough, and it will be connected to a PC, or Android device. First, I tought to use USB to connect ...
36
votes
6answers
4k views

Why are digital oscilloscopes still so expensive?

I'm a beginner in hobby electronics and I am wondering why digital oscilloscopes are still so expensive? In times of cheap GHz CPUs, USB 3, ADSL modems, DVB-S receivers, blu-ray players which all of ...