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Old 03-31-2016, 06:48 PM   #431 (permalink)
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The trick is to flash an empty sketch to the TinkerKit LCD. The timing is a bit tricky but it works well enough. When I have time I'll see if I can make cheap units using an ebay arduino nano, a cheap eBay LCD, and a postage stamp of PCB for the BJT, zeners, and resistors. It looks like the minimum BOM is $8 without case.

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Getting sensor data off of a pre OBDII Toyota ECU via TDCL.
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Old 04-14-2016, 08:00 PM   #432 (permalink)
The brake pedal is evil
 
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Trolla - '94 Geo Prizm base
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Is there any reason I wouldn't be able to add some code to do an analog read of my dashboard lamp rheostat voltage and have the micro controller adjust PWM based on dashboard brightness?
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Getting sensor data off of a pre OBDII Toyota ECU via TDCL.
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Old 04-18-2016, 01:16 PM   #433 (permalink)
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Quote:
Originally Posted by H-Man View Post
Is there any reason I wouldn't be able to add some code to do an analog read of my dashboard lamp rheostat voltage and have the micro controller adjust PWM based on dashboard brightness?
Hardware-wise, you'd have to add a voltage divider to condition your instrument panel lighting signal to be less than 5VDC, then feed it to one of the analog input pins. You'd want to also add a 5 VDC Zener diode to the pin for circuit protection. The circuit would look similar to this:



The resistor values would have to be adjusted, but that should be easy enough to do.

Software/Arduino-wise, this capability could easily enough be added in. My code already has analog input reading capability built into it - not sure if the original DCB 0.86 (or earlier) code would allow/accept Analog library calls. I'd just have to provision in a way of assigning an unused analog pin for use with brightness.

I got the analog gauge driver code added in, but haven't been able to find any time to test it.
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Old 01-05-2017, 07:19 PM   #434 (permalink)
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Well, then... I guess I can no longer edit the first post of this thread!

Time to start another workspace thread!
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Old 06-16-2017, 12:42 PM   #435 (permalink)
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Thanks for your work done, but it does not work with nozzles, peak and hold, I found a sketch. It works, could you add this algorithm to your code?
As well as add voltmert
Excuse me writing serz translator
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File Type: zip mpguino code meelis11.zip (21.1 KB, 36 views)
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Old 02-19-2018, 09:30 PM   #436 (permalink)
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Hi t vago :

Interesting Project ...Have a shcematic for Arduino Mega ?

Regards !
Pablo.
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Old 02-20-2018, 01:30 AM   #437 (permalink)
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There should be some description in the source code on what pins to connect for an Arduino Mega2560.

I have also started using GitHub -> https://github.com/tvago1972/MPGuino
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Old 02-20-2018, 07:18 AM   #438 (permalink)
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Thank you very match ! :-)
Quote:
Originally Posted by t vago View Post
There should be some description in the source code on what pins to connect for an Arduino Mega2560.

I have also started using GitHub -> https://github.com/tvago1972/MPGuino
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Old 01-17-2020, 10:34 AM   #439 (permalink)
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Hi, I created my MPGuino, downloaded the software (different versions) and slightly modified, all right. I want to use it with a marine engine. I also want to use a 20x4 LCD. But I can't edit the code. I see random characters all over the screen. How difficult would it be to edit the code for a 20x4 LCD (HD44780), can you please advise me? I'm getting started with programming. Sorry about my English. Thank you very much. Vítek

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