DSO Nano v1

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Contents

Introduction

DSO nano is a pocket size digital storage oscilloscope fulfills basic electronic engineering requirements. It is base on ARM Cortex™-M3 compatible 32 bit platform, equipped with 320*240 color display, SD card capability, USB connection, and chargeable batteries. Weighs only 60g.

Model: TOL114C3M

dsointro.jpg

Features

  • Super portable and lightweight
  • 2.8” color 320*240 display
  • Micro SD card Waveform Storage
  • Basic 1Msps sample rate with 12bit resolution
  • Various measurement markers
  • Various trigger mode
  • Build-in test signal
  • USB chargeable battery
  • Open source

Application Ideas

  • Application1
  • Application2
  • Application3

Cautions

The warnings and wrong operations possible cause dangerous.

Schematic

User Interface

Dsonano-useri-interface-1.jpg Dsonano-useri-interface-2.jpg

Specification

May include key specification and other specifications.


Key Specification

Display 2.8″ Color TFT LCD
Display Resolution 320×240
Display Color 65K
Analog bandwidth 0 - 200KHz
Max sample rate 1Msps 12Bits
Sample memory depth 4096 Point
Horizontal sensitivity 1uS/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, Norma, 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
Upgrade by bootloader via USB
Power supply 3.7V Chargeable Lithium battery / USB
Dimension (w/o probe) 105mm X 53mm X 8mm

Pin definition and Rating

Mechanic Dimensions

Usage

Basic Usage

The UI could be divided to 4 parts: main menu (top), functions (right column), status bar (bottom), and waveform & markers displays. Use cursor up , down, left , right to navigate among the three operational parts and make adjustments.

Waveform & Markers

  • Green waveform - current signal being monitored
  • Purple waveform – reference waveform loaded from SD card.

Page 4 of 9 10/26/2009

  • Voltage measure marker V1 and V2 (Dot, vertical) – A voltage measure value between

V1-V2 could be displayed.

  • Time measure marker A and B (Dot line, horizontal) – A time measure value between A

and B could be displayed.

  • Y positions marker (Purple) – Y position center line for adjustment reference
  • Trigger level marker (Yellow) – Used to set trigger level

Menu

Horizontal main menu on top of screen, Navigate by left and right, adjust by up and down. Sync. Mode: When blinking, press up and down to select 4 different synchronization mode: AUTO, NORM, SING, and NONE.

  • AUTO – Automatic synchronous sweeping mode, displays waveform even not

triggered.

  • NORM – Normal synchronous sweeping mode, displays whenever trigged.
  • SING- Single sweeping mode, display when triggered, then stopped with latest

triggered waveform.

  • NONE – Random sampling mode
  • SCAN – Scan mode, to check long period low frequency signal.

Vertical Scale: When blinking, press up and down to select different level of sensitivity. Total 19 scales are optional from 10mV/Div to 100V/Div.

  • Note 1: If you use scale above

20V/Div, please use probe with attenuation of 10:1).

  • Note 2: If newly set scale does not

match reference waveform, the latter will be cleared.

Horizontal sensitivity: When blinking, press up and down to select different sensitivities. from 1uS/Div to 10S/Div total 22 grades. Note 2: If newly set sensitivity does not match reference waveform, the latter will be cleared.

Y position: When blinking, press up and down to adjust the vertical position of the waveform. Press M to hide/activate Y position marker if needed.

Calculation Mode: Auto calculation modes include:

  • FREQN – Signal frequency
  • CYCLE – Signal period
  • DUTY – Duty time
  • Vpp – AC signal peak-peak value
  • Vram – AC signal effective value
  • Vavg – AC signal average value
  • DC.V – DC signal average value.

Power supply mode: Power supply by internal battery or USB port. Battery bar will be displayed when powered from internal.

Functions

Vertical function buttons on side of screen, Navigate by up and down ,adjust by left and right.

Trigger sensitivity: When blinking, press left and right to adjust trigger sensitivity, trigger level marker (Yellow dotted area) changes correspondingly.

Trigger Type: When blinking, press left and right to choose trigger mode of rising edge or falling edge.

Probe attenuation scale: When blinking, press left and right to choose 1:1 or 1:10 probe.

Save waveform: When blinking, status bar will display “ Save Filexxx”, press left and right to select file name with xxx = 000-255. Press M to save current waveform on display to SD card.

Load waveform: When blinking, status bar will display “ Save Filexxx”, press left and right to select file name with xxx = 000-255. Press M to load current waveform to display from SD card.

Note: current version has no file creation function, a FILEXXX.DAT must be prepared by connecting to PC by USB.

Ref. square wave freq: When blinking, press left and right to adjust the frequency of reference square wave.

Horizontal position adj: When blinking, press left and right to scroll waveform horizontally.

Index Bar: Show current display position of total loaded wavefrom.

Status Bar

Time markers: When blinking, press left and right to adjust T1 or T2 time measure marker, the time difference PT=T1-T2 will be displayed.

Voltage markers: When blinking, press left and right to adjust V1 or V2 time measure marker, the Voltage difference PV=V1-V2 will be displayed.

Trigger level: When blinking, press left and right to adjust trigger level, trigger level marker (Yellow dotted line) changes correspondingly.

Save Settings

Hold “R/S” Button and press “M” button to save current settings as default.

Firmware and upgrades

The DSO Nano v1 can use the same firmware as v2. See the common DSO Nano page for more information.

Example

The projects and application examples.

Bill of Materials (BOM) /parts list

Package list

  • DSO nano body x 1
  • 3.7v lithium battery with connector x 1
  • Back plate x 1
  • Mini Probe x 1
  • Manual X1
  • Protection bag X1

FAQ

Question1: What is the maximum input voltage when using a 10x probe on the Nano DSO?
Answer: The maximum input voltage could be 80Vpp. So when using a 10x probe on the Nano DSO, it could be 800 Vpp. However, we did not test that, and we are not responsible for any damage and injury because of measuring high voltage.

Support

If you have questions or other better design ideas, you can go to our forum or wish to discuss.

Version Tracker

Revision Descriptions Release
v1.0b Initial public release Oct 26, 2009

Bug Tracker

Bug Tracker is the place you can publish any bugs you think you might have found during use. Please write down what you have to say, your answers will help us improve our products.

Additional Idea

The Additional Idea is the place to write your project ideas about this product, or other usages you've found. Or you can write them on Projects page.

Resources

  • Find more resources on the DSO Nano page

How to buy

Click here to buy: http://www.seeedstudio.com/depot/dso-nano-pocket-size-digital-storage-oscilloscope-p-512.html?cPath=174.

See Also

Licensing

This documentation is licensed under the Creative Commons Attribution-ShareAlike License 3.0 Source code and libraries are licensed under GPL/LGPL, see source code files for details.

External Links

Links to external webpages which provide more application ideas, documents/datasheet or software libraries.

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