v3-nano-e1432305086526

DSO Nano V3 Micro-SD card DIY upgrade

I purchased some days ago a DSO Nano from the Italian shop Robot-Italy, i noticed it’s a good scope for beginners, it offers some rapid measurements like rms, duty, frequency,Vpeak-peak etc.

At the first power up i noticed a purple reference signal on the screen, it can be removed rapidly from the screen but at every reboot it reappear. OUCH!

Even the official forum did not gave a full solution for this stupid problem.

Few post around the web conviced me to try BenF firmware, i downloaded, flashed and got a white screen on the scope.

Few more searches and i found that i bought the last version of the scope featuring an ILI9341 LCD controller, not supported by the firmware downloaded, fortunately rimidalv007 fixed the lcd problem in a particular release of BenF firmware.

(see here —Search for: BenF_3.64APP_3.53LIB_patched_v2.zip)

My scope have the firmware update version 3.30D ? What? (this appears on screen putting device in dfu mode).

To flash firmware follow the guide on the official Seedstudio wiki page.

After the flash everything worked, except the signal save-load function. DAMN.

I bought an oscilloscope to save signals! UFFFF.

I opened the scope with the included screwdriver and i noticed a microsd unpopulated slot on the pcb…..MMMH, let’s try to solder a slot.

IMG_20150522_150053

I got a slot from an old mp3 player but i had to apply it with wires.

panoramica

To ensure slot functionality i desoldered the Vcc pin of the onboard serial memory, i used this datasheet picture to understand pinout:

Serial Flash Pinout

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Then i shorted the “card detect” pin of the slot with GND, to make sure the scope will recognize an inserted card.

IMG_20150522_134417

After a well insulation i plugged to my pc and a disk appeared. YUUUUUU.

Screenshot_1

Also saving signals from BenF firmware works.

Here is an example:

Screenshot_2

I got a working scope with a professional firmware fully working, try by yourself only if you now how to make this mod.

IMG_20150522_152150

If you want to restore the original behaviour simply remove the slot, reconnect the vcc pin of the onboard serial memory ad restore the original firmware, i uploaded the right version here, downloaded from the official cinese maker of the scope.

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