fungus, I'm thinking about getting a DSO Quad, since it can be used as a logic analyzer (perfect for serial RX/TX and i2c).
I was working on an I2C driver for an ATtiny a few days ago. I would never have fixed it without my Quad to look at the lines.
I've also been looking at recommended firmwares.
You said your formware was the GCC APP firmware. I think the UI looks a bit complicated,
It's not massively intuitive, no, but it's way more useful than the original firmware.
so I found gabonator's little baby; https://github.com/gabonator/DS203
May I ask, What kind of apps are you using? do you have some recommended apps? have you tested the Quadpawn app?
I honestly haven't tried many of them.
Sorry about all these questions, but I'm just so curious about this little, open source scope! how much better will the bandwidth if I either remove (saw it in a guide) or relplace it?
The difference is like night and day. With the bad diode in place any digital signal above 1MHz comes out as a flat line (I could see signals on the analog inputs but not the digital inputs - it should be the other way around!) With removed/replaced diode everything was perfect.
I don't know the new bandwidth limit because Arduinos can only output signals up to 8MHz. I know it shows 8MHz perfectly.