DSO Nano

DSO Nano

The DSO Nano is a one-channel handheld oscilloscope, suitable for quick field measurements and more. You will find it very simple to use, but it is nonetheless a quite amazing little tool.

Being a new and dynamic open-hardware and open-source project, the information tends to be scattered around quite a bit. This page will try to collect the most relevant information in a single place, in order to help newcomers find their way through the wealth of unorganized material already available.

Click the image to get to different version of DSO Nano.

DSO Nano v1

DSO Nano v2

Hardware details

So far there have been two major versions of the DSO Nano, the original one in 2009, and the DSO Nano V2 in 2010. (A significant hardware upgrade including dual channels was introduced with the DSO Quad.) Apart from the improved charging unit in V2, and a redesigned PCB, the specifications are pretty much the same. They can use the same firmware.

A photo from inside the V2 was posted to the forum.

CPU ARM Cortex™-M3 (STM32F103VBT6)
RAM 20k
Flash ROM 128k
Clock frequency 72MHz
Display 2.8″ Color TFT LCD
Display Resolution 320×240
Display Color 65K
PC connection via USB as SD card reader
Upgrade by bootloader via USB
Power supply 3.7V Chargeable lithium battery / USB (LTC4054 charger controller)

Upgrading the firmware

The DSO Nano you hold in your hand took some time to reach you; it is more than likely that a newer version of the firmware is already available.

The newest firmware from BenF is available from the Tech Support forum. Inside the ZIP file you will also find the operating manual for this firmware release.

To upgrade the firmware to the latest version, you have a few options:


Analog bandwidth 0 - 1MHz
Max sample rate 1Msps 12Bits
Sample memory depth 4096 Point
Horizontal sensitivity 1μS/Div~10S/Div (1-2-5 Step)
Horizontal position adjustable with indicator
Vertical sensitivity 10mV/Div~10V/Div (with ×1 probe)
0.5V/Div~100V/Div (with ×10 probe)
Vertical position adjustable with indicator
Input impedance >500KΩ
Max input voltage 80Vpp (by ×1 probe)
Coupling DC
Trig modes Auto, Normal, Single, None and Scan
Functionalities: Automatic measurement: frequency, cycle, duty,
Vpp, Vram, Vavg and DC voltage
Precise vertical measurement with markers
Precise horizontal measurement with markers
Rising/falling edge trigger
Trig level adjustable with indicator
Trig sensitivity adjustable with indicator
Hold/run feature
Test signal Built-in 10Hz~1MHz (1-2-5 Step)
Waveform storage SD card
PC connection via USB as SD card reader


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