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It’s built around the MAX232 IC
Water Dispenser
Output Voltage : 24V
16 have Blue filters
Digital Temperature Sensor Module (DS18B20) Motion It’s built around the MAX232Introduction : Digital Temperature Sensor DS18B20 is a one wire digital temperature sensor. This means that it just requires one data line (and GND) to communicate with the Arduino. Each DS18B20 temperature sensor has a unique 64 bit serial code. It can measure a wide range of temperature from 55C to +125 with a decent accuracy of 5C. Each sensor has a unique address and requires only one pin of the MCU to transfer data so it a very good choice for
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