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Old 04-17-2011, 03:53 PM   #266 (permalink)
steffen707
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i found on that thread that there have been some hardware changes.
hardware:
1. upgraded to atmega328.
2. switched to npn backlight driver, driven from vehicle voltage through a 1 watt resistor rather than regulator.
a. this allows the large capacitor to power the cpu longer in a power dip, since it doesn't try to power the backlight,
and the unit should survive power fluxuations better.
b. takes load off of regulator (the resistor does get warm).
c. makes it easier to relocate that source of heat and/or make it much easier to tie into existing dashboard dimmer circuit.
3. tied in the analog vss and vcc to facilitate analog inputs.
4. added pads for all unused pins (except reset), now experimetors can easily get to rx, tx, aref, 2 analogs and 2 pwm pins.
5. Turned down brownout detecton (we are not writing except at config)
6. Disabled self programming for stability.

All of these hardware changes are on the new "preassembled units" right?

I might be the only one, but i was confused if these hardware changes were just on the "mpguino kit", or on the "preassembled units". Also, i think i'm correct that you aren't affiliated with the person selling the kits, just with amy, and the preassembled units right?
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