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DS212 pocket oscilloscope: specs

A handheld two-channel digital storage oscilloscope from Miniware (minidso.com) with a 320 x 240 pixel color TFT display, a built-in signal generator and a rechargeable battery.

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Specs

Power

Pinout

We don't publish a pin table for this part: no official source we could verify gives one. Check the labels printed on your module, and see the notes below.

The manual describes the unit's buttons, thumbwheels, signal input, wave output and USB port, but gives no connector pin table, so none is listed.

Build with it

Project ideas for the DS212 pocket oscilloscope. Each link opens Soldr with the prompt filled in; Soldr assigns the pins, checks power and shows how to wire every part.

• PWM waveform viewer: The ESP32 outputs 3.3 V logic signals, well inside the 40 V input limit. Use the scope's ground clip on the board's ground. At 1 MHz bandwidth, keep the test frequency in the low kHz range so the shape of the square wave is visible. Learning project for reading duty cycle and frequency.
• RC filter step response: Drive a square wave from an ESP32 pin through a resistor into a capacitor, and watch Channel A on the input and Channel B on the capacitor. Both channels stay within 3.3 V. Pick the resistor and capacitor so the time constant sits inside the scope's 1 us/Div to 2 s/Div timebase range. Learning project.
• I2C bus watcher: Probe SCL on Channel A and SDA on Channel B while the ESP32 updates the display. Run the bus at 100 kHz so the 1 MHz bandwidth and 10 MSa/s sample rate show the edges. Learning project for spotting slow rise times when pull-ups are weak.

Common mistakes

• Measuring a signal of 40 V or more: the manual limits the input to 40 V with the X1 probe and says not to measure signals at DC 40 V or above (source: link, Safety Statement and Specifications p.1-2)
• Measuring mains: this oscilloscope is limited to 40 V, so it is not for mains; mains wiring needs a qualified person (source: link, Safety Statement, input limit 40 V)
• Connecting or disconnecting the probe while it is attached to a voltage source: the manual says to connect and disconnect properly and to disconnect power to the circuit under test before changing probes (source: link, Safety Statement)

Not covered by the official source

• The manual does not state the battery run time or charge current. The maximum input is stated only for the X1 probe setting (+/-40 V).
• Display size in inches is not stated in the manual; only 320 x 240 pixels color TFT.

Sources

• link (Miniware DS212 Mini Oscilloscope User Manual V1.0, app V1.03; verbatim maker PDF hosted by Elecrow)