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SMAKN® MPR121 Breakout Proximity Capacitive Review

1

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Excellent

Revainrating 5 out of 5  
Rating 
5.0
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Description of SMAKN® MPR121 Breakout Proximity Capacitive

Low power operation. 1.71 V to 3.6 V supply operation. 29μA supply current at 16 ms sampling interval period. 3μA Stop mode current. 12 capacitance sensing inputs.

Reviews

Global ratings 1
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Type of review

Revainrating 5 out of 5

Self-calibration gets my vote

I've been using a few of these in various touch button applications currently. The best part is that each input is automatically calibrated when the device is initialized. This requires a lot of guesswork when designing dimensions and distances from capacitive touch panels to other conductive surfaces. I recently tried using conductive paint on my pads and it worked great even on the back of 3mm thick acrylic sheets.

Pros
  • Power converter
Cons
  • Big and bulky