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I2C interface Capacitive Touch 12-Key Sensor Breakout MPR121 capacitive touch sensor with I2C 12-key input
You don't need a battery
Designed for use with Raspberry Pi Model A+/B+/Pi 2/Pi 3 only
Raspberry Pi
and simple PWM control hardware
pH 10.00 Calibration Solution Liquid - Basic Buffer pcb cleaning I2C interface Capacitive Touch 12-KeypH 10. 00 Calibration Solution Atlas Scientific The Atlas Scientific pH 10. 00 Calibration Solution is a precision reference liquid used to calibrate pH sensors and EZO pH circuits. Accurate calibration is the foundation of reliable pH measurement without it, your sensor readings will drift and become untrustworthy over time. This solution is manufactured to strict NIST traceable standards, ensuring the pH value is accurate and consistent from bottle
