Crystal Controlled RTC

Testing and development of Megasquirt 3

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TURBOSNAKE
MS/Extra Newbie
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Joined: Thu Jan 02, 2014 3:33 pm

Crystal Controlled RTC

Post by TURBOSNAKE »

James,

I've been having problems with my RTC (see post in general support section), and I recently came across a very small board with a clock and battery on it that's about the same size as the one I bought with my kit, but this one is crystal controlled and costs less than $5. It's a Tiny RTC from I2C Modules, and has the following connections: SQ, DS,SCL, SDA, VCC,GND and BATT.

At first glance, this seems like a less expensive and more accurate arrangement, but I'm wondering if you think it will work with the firmware (1.41).

Regards,

Jim
TURBOSNAKE
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Re: Crystal Controlled RTC

Post by TURBOSNAKE »

James, Here's a link to the data on the Tiny RTC: https://www.elecrow.com/wiki/index.php?title=Tiny_RTC

Jim
AbatelliCristian
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Re: Crystal Controlled RTC

Post by AbatelliCristian »

It depends on the chip used. They are not all compatible
racingmini_mtl
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Re: Crystal Controlled RTC

Post by racingmini_mtl »

The MS3 RTC does have a crystal. And make sure you do use a fresh battery.

Jean
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jsmcortina
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Re: Crystal Controlled RTC

Post by jsmcortina »

As Jean says, the realtime clock is crystal controlled already. If you elect to use a different chip, you'll likely need to write new firmware to support it as it is very unlikely to have the same I2

James
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