However what do you do when you want to read an analog signal, like what you might get from a thermistor, potentiometer, or many other types of sensors? By connecting a small analog. Compare this to the Arduino, AVR or PIC microcontrollers that often have or more anaputs ! Anaputs are handy because many sensors are analog outputs, so we need a way to make the Pi analog-friendly.
Necessary Packages GPIO: Anaput?
When working with analogue signals, scaling them to the correct range for the Analogue to Digital Converter ( ADC ) is always important. At this point we have learned how to write digital values to the GPIO pins, we have learned to simulate analog out using PWM, and we have learned how to do digital reads from the pins. If you are like me and came from the Arduino worl then you will likely be asking, “Now what about analog reads”. Raspberry Pi Zero Analogue to Digital converter, Channel ADC. A wide variety of sensors output analog voltage levels in response to environmental stimulus.
Examples of analog sensors are TMPtemperature sensor, and photo resistors. Too use analog sensors, you need an external ADC. In this article we read analog data through ADC over SPI. Continue reading “Raspberry pi analog input”
