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MMC working, but problems with SD
I have an MMC/SD card hooked up to an atmega168. After looking over the source code of many projects, I was able to read from and write to an MMC card perfectly. But when I try...
Tuesday, 9 January 2007 - 16:39
avr controlling a digital camera
In the past, I've attached wires to the focus/shutter switch inside a camera and used an avr with some transistors to take pictures automatically. I've heard that this can also...
Thursday, 5 October 2006 - 22:20
rc time lag with isp/spi protection series resistors
Hey, I just encountered a tricky problem with a new avr board. I had placed 3 10k series resistors between the spi bus lines and the microcontroller to protect the isp programmer...
Tuesday, 15 August 2006 - 17:54
float equation to integer math converter?
Has anybody come across something that would take a large floating equation (like a 2nd or 3rd order polynomial) and transform it into integer math more suitable for...
Tuesday, 25 July 2006 - 22:50
mmc card write
I've been looking through the academy projects using mmc cards to make my own mmc communication code. Only problem is every project I've looked at is a bit fuzzy on the sector...
Tuesday, 11 July 2006 - 17:12
Cheap PCB Prototypes
Hey, has anybody found a good pcb prototype deal? PCBFABEXPRESS has a 5 boards $10 each prototyping deal, the best I could find. They've made an avr board for me before, which...
Tuesday, 27 June 2006 - 19:38
avr pwm mosfet question
Hey, would a simple circuit like this work for switching a heater-resistor load?
Sunday, 25 June 2006 - 02:00
avr dataflash mixed voltage connection
I have a 5v avr system that I want to add a dataflash chip to. I already have a 3v source on the board, so power isn't an issue. Atmel's app notes suggest that it's okay for the...
Wednesday, 21 June 2006 - 17:48
unused pins
Hey. I remember hearing once that it's good to tie unused avr pins to a logic level to save power. Is this true?
Thursday, 12 January 2006 - 21:30
serial data monitoring
Hey. I have an avr board that I programmed to send out various values with identifier and data bytes over the uart. For my computer, I wrote a visual c++ program that keeps a...
Thursday, 29 December 2005 - 21:27
rounding after right shift
Hey. I have a 16-bit value that I need to put in the range of a 12-bit value for transmission to another board. I've shifted it right 4 times to get a 12 bit value, but those 4...
Tuesday, 27 December 2005 - 19:22
pwm spikes
Hey, I'm using an atmega88's timer1 PWM in Fast PWM mode. I've noticed that when I set the compare value at 0 and check the output pin with an oscilloscipe, I see occasional...
Monday, 19 December 2005 - 21:53