Timeline for Air pressure transducer to be connected with RPi 4
Current License: CC BY-SA 4.0
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| Dec 20, 2021 at 20:16 | comment | added | Gil | You can use any pressure sensor that will do what you with a DC output. The A/D you chose has a Vref and Aground, these supply the SAR (Successive Approximation Register) in the A/D. Your sensor's analog voltage will be referenced to this voltage. Be sure all grounds are connected. The A/D will give you a a digital value that is based on the reference voltage. If it is at Vref or above you should get 1023. If it is 0 you should get 0. If in between the count will reflect that. Get this: (SAR) Analog-to-Digital Converter by Microchip Technology Inc, I believe it is free and will explain a lot. | |
| Dec 20, 2021 at 20:03 | history | edited | Gil | CC BY-SA 4.0 |
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| Dec 20, 2021 at 9:25 | comment | added | ibrahim tahoun | thanks Gil for your answer. you are right, it is a temperature sensor that I need to substitute with a pressure transducer. I am just confusing a little bit because I know that any microcontroller reads the digital or binary signal as a voltage (0=0V & 1=5V) and RPI can only receives a max voltage of 3.3V. | |
| Dec 19, 2021 at 23:13 | history | answered | Gil | CC BY-SA 4.0 |