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2 bi-directional serial communication
The other benefit is that you don't need a bigger more expensive device with two UARTS. I think most or all AVRs have I2C. And even with the two additional signal lines, you're...
Monday, 16 February 2009 - 23:59
2 bi-directional serial communication
Is it a strict requirement that they be addressed in order from bottom to top? If so, it might not be feasible to use a bus like I2C without having any additional communication...
Monday, 16 February 2009 - 23:58
2 bi-directional serial communication
What kind of throughput do you need? Is there a reason you can't run a bus like I2C and just chain all the devices on it? You'd need some sort of multi-master bus, but then you...
Sunday, 15 February 2009 - 19:39
Minimal opperation during poweroff
I need to run things at 5V and I want a 2-cell battery backup, which leaves me with ~2.4V if I use NiMH. After a ~1V drop, it's 1.4V into the step-up regulator (MAX1674/1797),...
Friday, 6 February 2009 - 18:13
Minimal opperation during poweroff
Sorry to dig this old thread up but I have a related question and the schematic helps. With the schematic above, is there anything to worry about as far as reverse leakage through...
Friday, 6 February 2009 - 04:48
24VAC to 12VDC Question
emuler wrote:Full wave rectification of 24V AC will give you about 35V DC at the capacitor. Am I missing something here? Even if 24VAC is RMS, then 24 * sqrt(2) = 34V and 34 - (2...
Friday, 30 May 2008 - 04:51
Dragon under VMWare Windows session
Thanks Jörg =)
Friday, 25 April 2008 - 16:59
ATmega input resistor from 5V til 3.3V
The reason that the 100ohm is suggested is that it's enough to limit the current to the point that the overvoltage protection in the AVR can handle it. Essentially, the 100ohm...
Monday, 14 April 2008 - 05:26
Solder Paste texture. Did I ruin my batch?
maxinuruguay wrote:I didn't want to put it in my food refrigerator. It was temporary. Like Nard said, ice is at 0 degrees, your fridge is not =) @Brian: NOOO!! You must cherish...
Thursday, 10 April 2008 - 15:11
Solder Paste texture. Did I ruin my batch?
My only thought is: Why the hell did you put it in a basket of ice for a week? =) Not sure exactly what happened, but if the yellowish liquid came out of the solder paste, chances...
Wednesday, 9 April 2008 - 02:13
user interface for active high or low input sellection
I've heard of open-collector signals, but never open-...driven? Dunno what the term is. Do you have signals that are either high or hi-z? Or do you need the pullup/downs for...
Sunday, 6 April 2008 - 16:39
PCB designing(Home Mad)
I always did get a kick out of the endless supply of "What is the best HW and SW solution for all my problems? Somebody please send me complete source code for what I need! It's...
Saturday, 5 April 2008 - 06:31

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