Provide circuit diagram

[matt-downs]

Arduino Pin	Connected to
A0	Sensor signal
5V	5V VCC input from 12v USB adapter & Display VCC & Sensor VCC
GND	5V GND input from 12v USB adapter & Display GND & Sensor GND
A4 (SDA)	Display SDA
A5 (SCL)	Display SCL

[matt-downs]

@gurvir44 I don't have the software installed to generate a schematic right now but this should hopefully help you out 😄

[gurvir44]

Is there a way i can email you? I need a bit more help :/

[half-finished]

Which part are you stuck with? It worked first time when I followed it 1-1

[gurvir44]

I don’t have a oil pressure sensor yet, is there a part number for one you bought?

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Which part are you stuck with? It worked first time when I followed it 1-1

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[matt-downs]

In my case, the previous owner of my car had installed Defi brand digital boost and oil pressure sensors and gauges - I was able to hook into the existing 3 wire sensors. They were like these ones here: https://www.defi-shop.com/installation/sensor/

I think I used a multimeter initially to work out that the Defi sensors were powered by 5v which meant I could power and read them straight from the Arduino. The 3 wires were 5v VCC, 5v GND, and the sensor output. I looked at the datasheets for a bunch of 5v sensors like this one and just made the assumption that the Defi sensor reads from 0 to 140psi and the output would be between 0.5-4.5v. I did the same guesswork for the Defi boost sensor.

I believe sensors like these could work too, however I haven't tried them: https://www.rallysportdirect.com/part/gauge-sensors-wiring/prs-psebos-prosport-electric-boost-sender https://www.rallysportdirect.com/part/gauge-sensors-wiring/prs-pssmops-prosport-premium-oil-pressure-fuel-pressure-sensor

[gurvir44]

Thank you! I uploaded the command to my Arduino today and it worked. Sorry for the questions, its my first time using a Arduino.

[gurvir44]

Sorry to bother again, can you run both boost and oil pressure with one ardiuno? Or do you need a new one.

[matt-downs]

In terms of hardware: Sensor readings won't be an issue, just hook each one up to a different analogue input. Not too sure how to drive 2 seperate i2c displays from the same Arduino though. The Arduino Nanos are pretty cheap so I just opted for a seperate one to drive each display lol

[half-finished]

Yeah just google how to run 2 displays, you have to do some soldering and addressing in the code but it’s pretty easy, you should be able to run as many sensors as you have analog or digital I/O’s

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On 7 May 2020, at 2:00 pm, Matt Downs notifications@github.com wrote:

 In terms of hardware: Sensor readings won't be an issue, just hook each one up to a different analogue input. Not too sure how to drive 2 seperate i2c displays from the same Arduino though. The Arduino Nanos are pretty cheap so I just opted for a seperate one to drive each display lol

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[gurvir44]

My sensor outputs from 1-5v. Do i just have to un comment "return (m - 102) / 0.0585;" so there is no scale? Or do i have to "calculate" a scale for 1-5 which is just simply 0-1023n Edit: Got it!

[tobynambur]

Hallo how to make the sreen in Bar instat PSI