Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Interface | I2C |
| Operating Voltage | 3.3V - 5V DC |
| Touch Channels | 12 Independent Inputs |
| Communication Protocol | Standard I2C (Up to 400kHz) |
| PCB Dimensions | 20mm x 28mm |
| Weight | 3 grams |
| Operating Temperature | -40°C to 85°C |
| Sleep Mode Current | 30µA |
| Compatibility | Arduino, Raspberry Pi, ESP32 |
| Package Contents | 1x MPR121 Board, 1x Header Pin Set |
Anonymous
Apr 10, 2026
Rating: 4/5
Works as expected
Good value for money. I2C addressing is straightforward. Wish it came with soldered headers by default.
Anonymous
Apr 08, 2026
Rating: 5/5
Reliable capacitive touch
Used this for a control panel. No false triggers once calibrated properly. Highly recommend for automation.
Anonymous
Mar 30, 2026
Rating: 5/5
Perfect for prototypes
Cheap and effective. Allows me to test touch interfaces without designing custom PCBs. Fast shipping too.
Anonymous
Mar 29, 2026
Rating: 4/5
Good sensor, minor learning curve
The hardware is solid. Took some time to find the right library but works well now. Calibration is key.
Anonymous
Jan 21, 2026
Rating: 5/5
Great for DIY Keyboards
Works perfectly with my Arduino project. Very sensitive and easy to configure using available libraries.
Q: Is this compatible with 5V logic microcontrollers?
A: Yes, the board includes a voltage regulator and level shifting suitable for 3.3V and 5V systems.
Q: Does it work through plastic or glass overlays?
A: Yes, capacitive touch works through non-conductive materials like plastic or glass up to a certain thickness.
Q: What is the typical response time for touch detection?
A: The scan rate is configurable, typically around 1ms per electrode in fast mode depending on settings.
Q: Can I connect multiple boards to the same microcontroller?
A: Yes, you can connect up to 4 boards simultaneously by configuring different I2C addresses.
Q: Is there a specific library required for Arduino?
A: Several open-source libraries are available on GitHub and the Arduino Library Manager for easy integration.
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