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Author Topic: OLED gauge displays  (Read 2450 times)

rawr

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OLED gauge displays
« on: March 25, 2018, 11:52:44 PM »



These SSD1306 displays are pretty easy to use with arduino and look pretty decent in light and low light.


I've made these for my center console to display my wideband and fuel pressure sensor. 



The fuel pressure sensor is ran entirely by an arduino and cost sub 30 bucks with the arduino, sender and the display.




Here's a link to the github for the arduino code.


https://github.com/clbs/Arduino-OLED-fuel-pressure-and-wideband-o2-display/blob/master/dual_oled_gauge_display.ino



I can make a wiring diagram and explain further if anyone has any questions.




Link to OLED displays:
https://www.ebay.com/itm/0-96-inch-IIC-Serial-White-OLED-Display-Module-128X64-I2C-SSD1306-12864-LCD-GND/332415158671

Link to pressure transducer for fuel pressure:

https://www.ebay.com/itm/Pressure-transducer-or-sender-100psi-5V-Stainless-Steel-for-oil-fuel-air-water/282568485079


I've also designed a panel mount for autocad for these little OLED displays. The mount or PCB might need a little modification to fit. I'm not sure yet. The 3d print is currently in the mail.

They snap together on a panel so they should be decently easy to mount.



« Last Edit: March 26, 2018, 12:01:06 AM by rawr »
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Tim

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Re: OLED gauge displays
« Reply #1 on: March 26, 2018, 08:15:00 PM »

damn, that's cheap as hell and looks half decent.
Solid work
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Ntrain2k

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Re: OLED gauge displays
« Reply #2 on: March 26, 2018, 08:44:08 PM »

damn, that's cheap as hell and looks half decent.
Solid work
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92CXyD

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Re: OLED gauge displays
« Reply #3 on: March 27, 2018, 11:21:39 AM »

zahid

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Re: OLED gauge displays
« Reply #4 on: May 05, 2020, 06:10:20 PM »

hello sir
i want to only show  pressure in oled display my pressure transducer in put 5 volt dc and out put is 0.5 to 4.5 volt dc and pressure is 0 to 400 bar
i want to display the pressure in display only please send men the code thanks

i am waiting your replay
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rawr

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Re: OLED gauge displays
« Reply #5 on: May 05, 2020, 09:45:01 PM »

hello sir
i want to only show  pressure in oled display my pressure transducer in put 5 volt dc and out put is 0.5 to 4.5 volt dc and pressure is 0 to 400 bar
i want to display the pressure in display only please send men the code thanks

i am waiting your replay

Are you using the adafruit libraries listed in my github? arduino? know which pins to use? want it to display in bar?

LMK and i'll get you something
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ratcityrex

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Re: OLED gauge displays
« Reply #6 on: June 02, 2020, 10:51:52 PM »

That looks great!
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Joseph Davis

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Re: OLED gauge displays
« Reply #7 on: August 09, 2020, 01:26:08 AM »

This is horrible.

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Re: OLED gauge displays
« Reply #8 on: July 18, 2021, 05:19:33 AM »

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Re: OLED gauge displays
« Reply #9 on: July 19, 2021, 08:47:45 AM »

rawr

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Re: OLED gauge displays
« Reply #10 on: July 19, 2021, 09:24:28 AM »

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bikewrench

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Re: OLED gauge displays
« Reply #11 on: July 28, 2021, 11:31:16 PM »

Just finished a project with one of those OLED's. This looks like a cool one to try next. I got the code from your github. Thanks for sharing.  The link to the pressure sensor is dead. Is this similar specs to what you used? What is the pressure range of the one you used?

https://www.amazon.com/Pressure-Transducer-Sender-Sensor-Stainless/dp/B0748BHLQL/ref=sr_1_4?crid=24RK3DJFX6LVR&dchild=1&keywords=arduino+pressure+sensor&qid=1627528941&sprefix=arduino+pre%2Caps%2C227&sr=8-4
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92CXyD

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Re: OLED gauge displays
« Reply #12 on: July 29, 2021, 10:08:15 AM »

Just finished a project with one of those OLED's. This looks like a cool one to try next. I got the code from your github. Thanks for sharing.  The link to the pressure sensor is dead. Is this similar specs to what you used? What is the pressure range of the one you used?

https://www.amazon.com/Pressure-Transducer-Sender-Sensor-Stainless/dp/B0748BHLQL/ref=sr_1_4?crid=24RK3DJFX6LVR&dchild=1&keywords=arduino+pressure+sensor&qid=1627528941&sprefix=arduino+pre%2Caps%2C227&sr=8-4

That sensor looks like the $135 sensor AEM sales  :noel:

rawr

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Re: OLED gauge displays
« Reply #13 on: July 29, 2021, 08:17:16 PM »

Just finished a project with one of those OLED's. This looks like a cool one to try next. I got the code from your github. Thanks for sharing.  The link to the pressure sensor is dead. Is this similar specs to what you used? What is the pressure range of the one you used?

https://www.amazon.com/Pressure-Transducer-Sender-Sensor-Stainless/dp/B0748BHLQL/ref=sr_1_4?crid=24RK3DJFX6LVR&dchild=1&keywords=arduino+pressure+sensor&qid=1627528941&sprefix=arduino+pre%2Caps%2C227&sr=8-4

I think that's the exact same sensor. I had a 100psi sensor as well. As long as its a 0-5v output sensor and it comes with a datasheet you should be able to change the scaling. If its 4-20ma sensor you'll have to build a little extra circuit to change it to a voltage output
« Last Edit: July 29, 2021, 08:21:03 PM by rawr »
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bikewrench

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Re: OLED gauge displays
« Reply #14 on: August 15, 2021, 07:06:55 PM »

I got it assembled on a breadboard and it seems to be working well.  For testing I put the sensor and an analog gauge on an 1/8" tee and put some pressure on it with a bike pump. The gauge on the pump and the oled were pretty close. The old analog gauge was about 7-8 lbs off, it's probably not very accurate. I was checking out the code, and thinking about messing around with the scaling of the sensor. I'm a novice at coding, but looks like these are the lines that define the scaling.

  fpOutput = map(fpSignal, 0, 1023, 0, 5000);
  fpFinal = ((fpOutput - 500)/40);

I'm confused by the numbers/math, Can you explain how this is calculated, where the numbers come from? I think I understand that the first line sets the input to be 0v min and 5v max. But not sure whats happening on the second line.
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rawr

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Re: OLED gauge displays
« Reply #15 on: August 16, 2021, 02:39:42 PM »

yea the 0 to 1013 is the counts from the ADC coming in from the arduino. they map from 0-5 volts linearly so its easier to just convert it to be in millivolts as 0-5000 and make it human readable.

fpFinal is the output in volts subtracting a half a volt because that's where that sensors scale starts.


Here's the output for the sensor I was using.

Output: 0.5V to 4.5V linear voltage output. 0 psi outputs 0.5V. 50 psi outputs 2.5V. 100 psi outputs 4.5V

so the range for 0-100psi is 0.5 to 4.5v so that's 4V total so a 4000 count scale represents 0 to 100 psi. Makes the math pretty easy and you can just divide  4000 by 100 and since its linear every 1 psi is 40 counts.
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bikewrench

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Re: OLED gauge displays
« Reply #16 on: August 16, 2021, 04:51:28 PM »

That makes perfect since now. Thanks. Pretty sure mine is .5 to 4.5 as well.

Now I just have to figure out where I want to mount it. I have an old 14.7 NAW wideband controller that I've never used, its about the size of the oled. This would make a good display for it and it should fit in the same enclosure. Going to try to use just the atmega 328 in a socket and ditch the arduino to save space.

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rawr

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Re: OLED gauge displays
« Reply #17 on: August 16, 2021, 11:14:59 PM »

That would be dope if you got it running in a smaller pcb that would fit into a gage
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bikewrench

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Re: OLED gauge displays
« Reply #18 on: October 05, 2021, 01:49:57 PM »

Still working on this project. Was originally thinking of putting this in the stock radio slot. But I have an ef with a broken clock and found that I could fit 3 of these oled displays in its place. Ordered an i2c multiplexer to be able to use 3 displays with one one arduino. Had to modify the code a bit more than I expected, but got it going with an extra sensor for oil pressure. Should be able to fit the displays and all components including the wideband controller in the same space the clock occupied.



Thanks again for the inspiration and sharing the code

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