MadhuinoMMA

A low cost Arduino compatible board with accelerometer and RTC.
 
Board without groundplane fill. Doh! I think the batter holder is shown backwards.
 
The Freescale accelerometer supports selectable sensitivity ranges of +/-2g, 4g, and 8g.
Communication with the MMA7455L is done over the SPI interface, which is a highspeed digital connection which utilizes 4 pins. SPI is directly supported by the microprocessor though not by the Arduino language; however, and an SPI library is available. Refer to the main page for general Madhuino specifications
 
Two interrupts are supported:
  • Jumpers allow connection of MMA device interrupts to I/O pins
  • Int1 on the MMA is connected to TX1 (aka pin 18), Arduino external interrupt 5
  • Int2 on the MMA is connected to RX1 (aka pin 19), Arduino external interrupt 4
Help is needed to develop a library for this device!
 
Status:
This is an alpha design, and no PCBs have been made yet. First boards will be tested in June.
 
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MadhuinoMMA.alpha02.brd
(113k)
Madhusudana Das,
May 25, 2009, 9:43 AM
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MadhuinoMMA.alpha02.sch
(424k)
Madhusudana Das,
May 25, 2009, 9:46 AM
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