MPR121 Breakout V12 kapazitiver Touch-Sensor für Arduino mit I2C

La placa està fabricada en PCB estàndard FR4 amb components SMD. Les seves dimensions aproximades són 29 mm x 21 mm x 2 mm i el pes és inferior a 5 g. El paquet normalment inclou només la PCB pre-soldada; connectors i cables no solen estar inclosos.

El rendiment del MPR121 es pot veure afectat en ambients humits o amb fort soroll electromagnètic, ja que la capacitat ambiental pot alterar la sensibilitat i provocar falsos positius o errors en la detecció. Es recomana un disseny adequat del PCB i aïllament físic per millorar-ne la fiabilitat en aquests contextos.

Verifica que els pins SDA i SCL tinguin les resistències pull-up de 10 kΩ activades o connecta’n d’externes si cal. Assegura’t que l’adreça I2C (per defecte 0x5A) no entri en conflicte amb altres dispositius i que la tensió d’operació sigui de 3.3 V. Si el problema persisteix, revisa la integritat de les pistes i connecta a terra correctament els elèctrodes no utilitzats.

The board is made from standard FR4 PCB with SMD components. Its approximate dimensions are 29 mm x 21 mm x 2 mm and its weight is under 5 g. The package normally includes only the pre-soldered PCB; connectors and cables are usually not included.

The MPR121’s performance may be affected in humid environments or where there is strong electromagnetic noise, as ambient capacitance can alter sensitivity and cause false positives or detection errors. Proper PCB design and physical isolation are recommended to improve reliability in these contexts.

Check that the SDA and SCL pins have 10 kΩ pull-up resistors enabled, or connect external ones if necessary. Make sure the I2C address (0x5A by default) does not conflict with other devices and that the operating voltage is 3.3 V. If the problem persists, check track integrity and properly ground any unused electrodes.

The board is made from standard FR4 PCB with SMD components. Its approximate dimensions are 29 mm x 21 mm x 2 mm and the weight is under 5 g. The package normally includes only the pre-soldered PCB; connectors and cables are usually not included.

The MPR121’s performance may be affected in humid environments or where there is strong electromagnetic noise, as environmental capacitance can alter sensitivity and cause false positives or detection errors. Proper PCB design and physical isolation are recommended to improve reliability in these contexts.

Check that the SDA and SCL pins have 10 kΩ pull-up resistors enabled, or connect external ones if necessary. Make sure the I2C address (0x5A by default) does not conflict with other devices and that the operating voltage is 3.3 V. If the problem persists, check track integrity and properly ground any unused electrodes.

Kortet är tillverkat av standard FR4-PCB med SMD-komponenter. De ungefärliga måtten är 29 mm x 21 mm x 2 mm och vikten är under 5 g. Paketet innehåller normalt endast det förlödade PCB:t; kontakter och kablar ingår vanligtvis inte.