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Widely used in indoor temperature and humidity measurement
phones and so on
the switch is a button which you may use with a digital input pin of your Micro Controller eg
Product Name: Inductive Proximity Switch
Current Sensor ACS712 (30A) Non-invasive Widely used in indoor temperatureWith this current meter, it is easy to measure the consumption of something, for example, to protect something from too high a current. Connections: 5V GND (earth min ground) Out (analog output voltage) By reading the voltage you can measure the current. This is approximately 66mV A. This version is suitable for currents from 30A to 30A, so the current can be read on both sides from 0 to 30A. There is an LED on the module that indicates whether the
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