How to connect a 5V sensor to a multiplexer?
So let’s connect 5V to all boards using the red wires. Now we will connect the first sensor to the first I2C bus from the multiplexer. For that, connect the SDI pin from the sensor to the SD0 from the multiplexer. Now connect the SCK from the sensor to the SC0 from the multiplexer.
Which is input does a multiplexer circuit control?
The input A of this simple 2-1 line multiplexer circuit constructed from standard NAND gates acts to control which input ( I 0 or I 1 ) gets passed to the output at Q.
How to connect multiple sensors using an I2C multiplexer?
Just repeat the same to all sensors, connecting each one to a different I2C bus from the multiplexer. As you can see, after all that we have four different I2C buses, where the white wires correspond to the clock lines and the grey wires represent the data lines.
How does an Arduino connect to a multiplexer?
So the 5V pin from the Arduino goes to the VIN pin from the multiplexer, as well as the VCC pins from each boards (red wires). And of course, connect all GND pins to each other (blue wires). The sensors and the multiplexer are now all happily connected to each other and to an Arduino Uno.
What’s the difference between analog and digital sensors?
The Arduino has built-in analog and digital input and output (I/O) pins that you can interface to a variety of sensors and devices. The difference between analog and digital sensors is that an analog sensor collects readings over a range of values, and a digital sensor only reads a HIGH or LOW signal (a bit of data).
How to read analog sensors on an Arduino?
Feel free to adjust this delay to whatever interval makes sense for your application. Once you have the test code written, save the sketch and upload it to the Arduino. Open up the serial monitor and you should see values from 0-1023 depending on how bright or dark the area is.