Share My Creation Additional car gauge (inspired by nissan GTR)

Hi it is my first serious creation.
A little technological gibberish about it.
- Tablet Goclever R76.2 screen resolution of 1024x552 Android 4.1 Jellybean (previously tested also on Goclever A93 with android 4.0 with the exception that I had to slightly modify Android and for that you need a root, on R76.2 soft started immediately without modification)
- Connection to the tablet via USB (there is also version that can connect via Bluetooth but my tablets does not have BT )
- Module data collection from sensors based on Atmega8 microcontroller (so far all the sensors are not hooked up to the pcb, to check the transmitted data and the stability of the entire system.without sensors the data shown in the screenshots have nothing to do with reality )
- Silver box shown in the picture is the target container for the “data collector pcb” ( each pcb is designed for both data transfer via USB and BT , depending on the communication module plugged )
- The picture shows the USB communication module based on FTDI chip
Now a little about the program
There are eight gauges to obtain any measured value on the screenshots you can see four EGT gauges on the use of a separate transmitter we will be able to measure 1 to 12 EGT (or more) probes the highest temperature and the channel number on the bottom of the window
At the bottom of each gauge is a digital indicator window showing the current value of the gauge.
By clicking on the gauge surface you go to a screen where we recorded the highest value reached by the individual gauge since the last resete of value (exiting from the program does not delete the value ) each value could be reset from this window. Clicking on the the digital window , you go to the window where you can enter the alarm value for each measured value ( these values also are saved, and shuting down the program does not erase them )
As the program communicates with the module data collection in both ways I want to expand the capabilities of device to control other modules conected via rs485. In my case it will be progressive nitrous oxide controller and a fairly complicated boost controller .
If you have any questions, or suggestions would love to hear and try to answer if I will be able to.


Screenshot_2013-04-25-15-53-17.jpg 2013-04-25 zamontowany w aucie.jpg Screenshot_2013-04-25-15-51-06.jpg 2013-04-25 16.33.2.jpg
 
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Beja

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Hi Quaki and thanks for sharing this.

Is the data collected, raw (analog, 4 ~ 20mA,,,etc) or ripe! (rs232, ~485.. etc)?

edit:
I mean are the sensors passive or with embedded controllers?
 
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Quaki

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Data are colected by the ADC of Atmega (analog 0-5V) only EGT probes are conected to the specialized thermocouple amplifier AD595 then to ADC all data are send to the R76.2 by rs232 (in the near future I want to change the thermocouple conection to Max6675 it will give me the possibility of conecting more EGT probes without taking the ADC of microcontroler because MAX6675 conects to the atmega by the SPI )
 

Beja

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Thanks and now I understand.. that the sensors are passive components that provide varying
voltage to the controller. (0 ~ 5), and then everything else is happening in the controller side.>>
but in this case how are you going to connect multiple sensors to the controller? To multiple
ADC channels? or you are putting a MAX chip in each sensor?
 

Quaki

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Atmega8 DPID has 6 ADC chanels (smd version has 8 adc chanels ) if you want more analog chanels you have two options
1. add an additional chip like for example MCP3008 (8 additional ADC chanels) and conect it to the atmega by SPI
2. conect more atmegas by the Rs485 (even up to 128 atmegas can be conected using some maxim chips typicaly you can conect up to 32 atmegas) to network and use them to collect more data (each one has 6-8 ADC)
Max6675 is specialized chip to control thermocouple and it uses SPI you can control only one thermocouple by this chip
All data to create interface are on the forum rotating bitmaps, background images, transparnet background etc. You will also have to use some graphic skills but it is possible (I'm mechanical enginer and the programing is only my hobby so if it is possible for me it is possible for everyone ) :)
Best regards
 

Beja

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Thanks Quaki,
another question.. is the Atmega8 DPID embedded in the sensor or the Android device? I am asking with
the assumption that the sensor is located away from the Android device.
 

Quaki

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Hi
Yes sensor are placed 1,5-2 m away from Atmega and Atmega (silver box from the picture) is conected to the Android device by 2m USB cable or by the bluetooth device (10m range of comunication). If the sensors are conected to the another Atmega and two Atmegas are conected by the rs485 you can comunicate on 1000m range
 

whcir

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Hi Quaki,

I like your gauge design. would be nice if they were in a library to share
 
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