Hacking the $18 Fnirsi DSO152 portable oscilloscope

[david.given]

Warning: I made this.



As a 200kHz oscilloscope I don't think it's worth much, but as a CH32F103-based Blue pill development board in a nice case with a high-bandwidth screen, battery and charger and USB-C, it's potentially pretty useful.

I've since found out that Fnirsi make the DSO153, which is an upgraded model with signal generation support. This looks similar but has a different microcontroller and a more complex board and, obviously, an output analogue stage. I can't get a good picture of what the microcontroller is but it's likely to be an upgraded CH32F. It's another $10 more expensive, which takes it out of the sub-$20 sweet spot of being-cheap-enough-to-buy-as-a-component that the DSO152 is in, but if anyone does want to build a custom diagnostic tool it might still be worth a look...

[Atlan]

One pin is enough for programming ? I program the CH32v003 via the SWDIO pin.

[david.given]

The V models are RISC-V based, though, and AFAICT they use a different debugging protocol; I've never used one. This one's an ARM and uses the standard two-wire SWD protocol (which is both a good thing, because it's standard, and a bad thing, because it uses two wires...).

[Just_another_Dave]

DSO153 is supposedly able to measure up to 1MHz, which could be enough for some testing on the go or for conducting small repairs (e.g checking if a power converter is working fine). However, it seems to be unable to save measurements, so modifying its firmware to be able to send them to a computer over usb could make it more useful

[coromonadalix]

    loll to play pong on it   

kudos

[Atlan]

I tried upload the (original fnirsi web page) BIN with a new uP but it doesn't work. Could someone fix it?
 Thank you.

P.S: I have the input part redrawn, but only on paper for now.

[Atlan]

Nobody came up with anything? So at least we'll play, added support for the ON/OFF button. Upload code with wch linkE or stlink v2

I'm not sure about the relay contacts. Errors are possible.

[Atlan]

Added on/off, fixed colors, game level display.