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PlainDAQ

by: Sep 16,2022 213 Views 0 Comments Posted in Engineering Technical

PlainDAQ is a module, it can turn your Raspberry Pi Pico into a simple and precision 4-channel oscilloscope and single-channel function generator. It also has a Wi-Fi module that can add wireless capability to the Raspberry Pi Pico if you want.

PlainDAQ adds basic simulation capabilities to your Raspberry Pi Pico board. It features a precision, low noise, low drift 12-bit 500Ksps/s ADC that samples 4 channels and supports 3 ranges (±1V, ± 2V, ± 4V). In addition, it includes a 10-bit DAC that helps create analog outputs and waveforms with a single range of ±4V.

Industrial Applications

PlainDAQ has a wide range of industrial applications, including remote data logging and control. With open-source Python scripts and firmware, you can configure PlainDAQ at will.

Educational Applications

PlainDAQ' s ability to generate and capture waveforms can help students and enthusiasts understand the circuits they are building.

It is sometimes difficult to understand the frequency-related aspects of analog electronic devices : frequency response, step response, filter, etc. Therefore, the author designs I2C controllable low-pass and high-pass filters that can directly obtain power from PlainDAQ. Their cutoff frequencies can be set separately, and they can also be cascaded to form band-pass and band-stop filters. By measuring their frequency response and changing their cut-off frequency, you can observe their response and better understand these concepts.

Features & Specifications

Analog Inputs:

  • 4 Channels (multiplexed)
  • 12-bit resolution, 72 dB SNR (11.6 ENOB, 4000:1 dynamic range)
  • 500 kS/s sampling rate
  • ±1 V, ±2 V, ±4 V bipolar range

Analog Output:

  • 10-bit resolution
  • 50 kS/s sampling rate
  • ±4 V bipolar range

Voltage Reference:

  • 2.5 V, 20 ppm/°C (Typical) Drift
  • Calibrate to 0.05 %, Stored in as ROM as calibration data

Bipolar Voltage Supply:

  • ±8 V power output.
  • ±100 mA current rating.

ESP-WROOM-02D AT-Command Module:

  • Simple UART interface to Raspberry Pico
  • Wi-Fi connectivity
  • Shipped with ESP AT firmware


This project is going to crowdfund on CrowdSupply, check here for more info and support it if you are interested:)

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