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Topic: Allegro - An automotive grade "Uno" (Read 5072 times) previous topic - next topic


Dear All,

Another project of mine is the "Allegro" project. This is essentially an Arduino "Uno" featuring an automotive grade ATmega64C1 featuring LIN and CAN interfaces.

In addition, the plan is to include an automotive grade supply circuit and LIN transceiver. The CAN interface would be supported via a shield.

The project is hosted here:


If you are interested or want to know more, just drop me a line.

Thanks and best regards, Stuart


Do the IO lines support 12Volt, 24V or even 48V (LKW) battery voltage? [15V would be great already!]

That would be a real automotive duino.

Are you familiar with the ruggeduino? - http://ruggedcircuits.com/html/ruggeduino.html -
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)



Thanks for the link - that is an interesting concept with the Rugged design.

The concept with Allegro is not to make all of the AVR pins automotive capable, rather make the board automotive capable for use in the car.

The power supply will support direct connection to the 12V connection in the car, whilst being able to withstand peaks of up to ~40V which occur when the battery is charging or as a result of starting the engine. On top, with CAN and LIN the board will be capable of commuicating with in-car networks.

I am hoping that the CAN and LIN busses will also be of interest for those who want to network Arduinos to exchange data between them outside of the automotive environment, and who require something simpler than ethernet.

BR, Stuart


Some automotive ideas:
- a better wiper algorithm
- braking lights with intensity related to the speed/braking force
- alarm lights that can send "SOS" in morse instead of just blink blink blink etc
- blackbox like in airplanes
- fuel efficiency monitoring
- ...
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

James C4S

So I assume all of the components, including the passives, are automotive grade (AEC-Q100/Q200 qualified) as well?
Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com

Jack Christensen

Feb 13, 2013, 04:36 am Last Edit: Feb 16, 2013, 08:48 pm by Jack Christensen Reason: 1

Some automotive ideas:
- ...
- blackbox like in airplanes
- ...

Had it for years. Great resource for law enforcement and the legal lottery :smiley-eek-blue:

Recent news item: http://catless.ncl.ac.uk/Risks/27.16.html#subj16


Hi James,

Yes, this is the intention.

Since I don't have an automotive qualified 8-bit AVR with USB, I intend to implement the USB/UART interface so that it can be broken off, thus leaving the remaining board as 100% auto qualified. The USB/UART interface isn't always needed in all applications.

Does that sound OK to you? Alternative would be an AVR32, but I want to avoid to much unnecessary components on the board when doing the EMC testing. Seems pointless to me adding huge complexity and time into fixing potential EMC issues in the USB/USART section of the design just to pass standard EMC tests.

Hope to hear from you soon.


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