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AVR Abilities Clarification
You may still need the 4.7k resistors depending on the requirements for rise time. Since the internal pull-ups are likely on the order of 10's of kohms, they'll pull up the lines...
Saturday, 9 February 2008 - 02:19
DC motor selection
Driver IC is easy, but will cost more for high current. A simple H-Bridge might be a touch more design/assembly, but isn't difficult by any means and for a couple $$'s, using...
Friday, 8 February 2008 - 17:21
DC motor selection
ant452 wrote:So if my max. current is 2A do I select a motor with a maximum running current of 2A? You should select a motor with a continuous current of no more than 2A and a...
Friday, 8 February 2008 - 08:28
CRC7 for CMD8 for SD card?
I just use a simple command-line perl program I wrote for it. It's at work, though, or I'd send it to you now. Can send it tomorrow. Just pass in the packet in hex and it'll spit...
Friday, 8 February 2008 - 04:26
CRC7 for CMD8 for SD card?
Looks like your command is fine, and according to my crc generator, it should be: 0x48 00 00 01 AA 87 Have you tried that?
Thursday, 7 February 2008 - 18:02
Interfacing DS1307 with ATmega16
Dunno what php issues are preventing you from grabbing the .zip file, but I assume they'll also prevent you from grabbing the .h and .c files, so here's all 4 of them, each...
Wednesday, 6 February 2008 - 16:55
Motors with Microcontrollers
If it wasn't clear, definitely do NOT just connect the motor to the I/O pin and try to drive it =) It'll likely take far more current than the AVR can provide, especially if it's...
Wednesday, 6 February 2008 - 16:50
MMC data reading speed - How to increase?
SPI mode is inherently slow to start with, compared to the normal MMC bus. If you really want faster speed, then yes, switch to a uC with MMC bus capabilities (or at least write...
Monday, 4 February 2008 - 17:03
Breakpoints make SW work
You're probably right with the timing issue thought. Just because you set the breakpoint on j = 0xFF, doesn't mean that it's that instruction being slowed down that's fixing it....
Monday, 4 February 2008 - 17:00
Camping Stove temperature control idea, in search of advice
arcs_n_sparks wrote:Much easier than the J or K thermocouple, cold junction compensation, comparators, threashold testing, and LED drivers. Don't forget the LCD display, high...
Monday, 4 February 2008 - 06:46
Dragon acting up... advice please
If only an engineer could live by the "if it works, don't fix it and don't complain" mantra... Sadly, if it was mine, I'd probably just try to break it again until I fully...
Monday, 4 February 2008 - 01:32
Camping Stove temperature control idea, in search of advice
Considering he's been making them in the past with no temperature control at all, I assume it's not exactly mission-critical =)
Monday, 4 February 2008 - 01:31

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