Arduino UNO with 4 x TM1637 connected to 2 Automotive coolant sensors, oil pressure sensor and a vacuum sensor

Projects General Guidance
1

Hi all

I’m new to all of this so please bare with me…

I would like to display 4 independent signals on TM1637 using the following sensors

• Temperature - part number 0 280 130 026
• Oil pressure - part number TBC
• Vacuum - Still to confirm

I’m currently using the TM1637 library, how do I get the sensors to work and display?

2

You need details or measurements taken from the sensors to find their characteristics.
These typically ( but SOME are now digital !!! ) act as “Variable “ resistors , but are often of low resistance , 100-200ohm max ?
( as they drive gauges direct ) So you will need a voltage divider connected to An analog input .
As the resistance is low , you’ll need to power from a stable voltage source ( not the Arduino) and I’d suggest using the internal voltage reference , as it gives around 1.1 volts full scale on the A/D.
Temp sensors tend to be non linear and you’ll need to deal with that .( a ds18b20 might be better )

3

Hi

I have a a 2.2k resistor between the voltage output on the sensor (A0) and a the 5V

4

So with that what range of voltages will you get at A0 ?

5

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