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Forum Index : Microcontroller and PC projects : MaxiMite Current Consumption

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Ray B
Senior Member

Joined: 16/02/2007
Location: Australia
Posts: 219
Posted: 10:49am 20 Jun 2011
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Was looking at a battery backup arrangement for MaxiMite to retain Date / Time for a logging application - driving a basic MM without nothing else connected from 6 x 1.2 rechargables into the external power socket was pulling 120mA.
Thirsty little bugger....
RayB from Perth WA
 
donmck

Guru

Joined: 09/06/2011
Location: Australia
Posts: 1313
Posted: 11:59am 20 Jun 2011
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  Ray B said   Was looking at a battery backup arrangement for MaxiMite to retain Date / Time for a logging application - driving a basic MM without nothing else connected from 6 x 1.2 rechargables into the external power socket was pulling 120mA.
Thirsty little bugger....


I would like to think that within 2 or 3 months there will be Real Time Clocks with battery backup, if you can wait that long Ray.

Cheers Don...
https://www.dontronics.com
 
Ray B
Senior Member

Joined: 16/02/2007
Location: Australia
Posts: 219
Posted: 01:09pm 20 Jun 2011
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Don RTC is no longer a problem.... see James post "Script to connect, then set date and time" for users of TeraTerm.

As soon as I switch on using USB date / time is set through a simple macro but yes this is just a work around until we have I2C working to DS1307 chips.
RayB from Perth WA
 
captainbill

Newbie

Joined: 16/06/2011
Location: United States
Posts: 37
Posted: 01:35pm 20 Jun 2011
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Howdy

Dallas Semi ds1307, 2 pins, small breadboard, I2C software for the Maxi.

Dallas also makes temperature compensated high accuracy version.

Bill

Old school. Still interested. Head in the clouds.
 
Glenn

Newbie

Joined: 14/06/2011
Location: Australia
Posts: 29
Posted: 03:33am 21 Jun 2011
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Hi

I have some PCB's for some of the popular RTC chips, with battery backup, waiting for the IIC commands though !

http://www.carnut.info/Trx-RTC/RTC.htm

This PCB was designed to fit on the back of a colour TFT display, also using IIC commands.
http://www.carnut.info/tftpcb/tft.htm




Glenn
http://www.carnut.info/maximite/index.htm

VK3PE
 
Glenn

Newbie

Joined: 14/06/2011
Location: Australia
Posts: 29
Posted: 03:39am 21 Jun 2011
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The DS1307 is limited in IIC speed to 100KHz I think, which may or may not be an issue.

glenn
VK3PE
 
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