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Ask an Expert Forum Deciding on a DMM, USB logic analyser, and power profiler.
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Deciding on a DMM, USB logic analyser, and power profiler.

Hari-Seldon
Hari-Seldon over 2 years ago

Would love your advice on both logic analyzers, DMM, and a power profiler.

I've got a, let's call it semi-serious electronics habit and I'm doing some design using an ESP32C3 and a DWM1000 (UWB chip) communicating over I2C.  I've also got some sensor packages using SPI.  Debugging is a nightmare without a logic analyzer and I'm looking for an appropriate device in a "serious hobbyist" budget (ideally under £600) and without a month-long wait!

I'd also like a good handheld DMM with auto ranging, temperature, and a stable kickstand/probes!  Is there a particular one you like?

Finally, would love your input on a way of measuring power consumption of the device.  I'm looking at the Nordic Power Profiler Kit II, would you have another suggestion or is that a good one?

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Top Replies

  • michaelkellett
    michaelkellett over 2 years ago in reply to fmilburn +2
    This is the circuit I'm using. It measures high side current through R100 and drives the same current throught R104, R105 and R106. It was extracted from a bigger design so apologies for the odd net…
  • michaelkellett
    michaelkellett over 2 years ago +1
    I have two logic analysers which I recomend: This one https://thedebugstore.com/products/zeroplus-lap-c-logic-cube-analyser-uk and this one: https://thedebugstore.com/products/zeroplus-lap-c-pro…
  • javagoza
    javagoza over 2 years ago in reply to charlieo21 +1
    If you only need the Logic Analyzer I think the Digital Discovery is a better option Analog Discovery 2. https://www.newark.com/digilent/410-321/pc-based-oscilloscope-30mhz-10msps/dp/40AH1640…
Parents
  • charlieo21
    0 charlieo21 over 2 years ago

    I really like the Analog Discovery 2.

    410-321 - Digilent - PC USB Oscilloscope, 2 Analogue, 30 MHz (newark.com)

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  • javagoza
    0 javagoza over 2 years ago in reply to charlieo21

    If you only need the Logic Analyzer I think the Digital Discovery is a better option

     Analog Discovery 2.

    https://www.newark.com/digilent/410-321/pc-based-oscilloscope-30mhz-10msps/dp/40AH1640

    image

     Digital Discovery + HIGH Speed Adapter & Logic Probe

    Portable USB Logic Analyzer and Digital Pattern Generator, Digital Discovery

    https://www.newark.com/digilent/410-349/high-speed-adapter-logic-probe/dp/40AH1661

    image

    image

    • 16 channel digital logic analyser and pattern generator (3.3V CMOS, 100Msample/sec)
    • 16-channel virtual digital I/O including buttons, switches and LEDs
    .
    • 24 channel digital logic analyzer (1.2V to 3.3V CMOS, up to 800MS/s) 800MSps input sample rate when using maximum 8 inputs (and the High Speed Adapter), 400 MSps with maximum 16 inputs (with the High Speed
      Adapter), 200MSps and lower with maximum 32 inputs
    • 16 channel pattern generator (1.2V to 3.3V CMOS, 100MS/s)
    • 16 channel virtual digital I/O including buttons, switches and LEDs for logic training applications
    • Two input/output digital trigger signals for linking multiple instruments (1.2V to 3.3V CMOS)
    • A programmable power supply of 1.2V to 3.3V/100mA
    • Digital bus analysers (SPI, I²C, UART, parallel)
    Price: ~$399.00 Price: ~$229.00 + ~$51.00
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  • charlieo21
    0 charlieo21 over 2 years ago in reply to javagoza

    You're right but I think the AD2 is much better tool and definitely will be more useful, you can use it as a benchtop DMM also with an external shunt you can measure current. 

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  • michaelkellett
    0 michaelkellett over 2 years ago in reply to charlieo21

    The Zeroplus LAPC is a much, much better purpose built logic analyser (than the Digital Discovery) with over 100 decoders in the package for less money than the Digital Discovery.

    MK

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  • michaelkellett
    0 michaelkellett over 2 years ago in reply to charlieo21

    The Zeroplus LAPC is a much, much better purpose built logic analyser (than the Digital Discovery) with over 100 decoders in the package for less money than the Digital Discovery.

    MK

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