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help reading a disc capasitor
I seem to be getting confused by the info on the net here. I have a disc cap that has: B 101 --- 101, is a underlined and the color is orange. I read this as 10pf but I certainly...
Saturday, 26 February 2011 - 19:13
atmega pins, do they have a small capacitance?
I was playing around with an idea to read a 0-500 ohm variable resistor. Normally one would use a 555 timer and charge a cap up. Recording the time it takes to do so gives you the...
Wednesday, 9 February 2011 - 17:32
mega8 pc6 usable with reset?
Would I be correct in saying the pc6 pin is out of order when reset is enabled? Thus, the only way to use it as input would be to disable reset? Furthermore, if I do disable reset...
Friday, 4 February 2011 - 02:41
messed up my ADC from mega 168 to 328? [solved]
I was using the ACD in my 186 for a project like so: #define ADC_VREF_TYPE 0x40 static int read_adc(unsigned char adc_input) { ADMUX=adc_input|ADC_VREF_TYPE; _delay_us(150...
Wednesday, 2 February 2011 - 21:47
burned a chip with RSTDISBL=0, how to revive?
I guess using the rest disabled fuse sort of locks you out. Is there a way to fix the fuses without a high voltage programming or pumping a square wave in this case?
Wednesday, 1 September 2010 - 00:42
fuses for atmega328p, use bootloader
I cant quite figure out what's going on here. I use a bootloader with my atmega 168 with fuses FC extended DD High DF Low When I try to match up the fuses for my 328p, the...
Monday, 30 August 2010 - 22:23
how to #define an asm loop
I want to do something like this. #define DELAY_1US asm("ldi r19, 3\n oneUS: \n dec r19\n brne oneUS\n"); but using my define more than once gives me the oneUS is already...
Friday, 11 June 2010 - 14:38
section of code to asm
Anyone know of a tool to convert a C file or section of code to asm?
Saturday, 15 May 2010 - 18:18
good resource for ATMEGA168 or 328's ?
I have seen ebay get as low as 3.50 a pcs for 168's and mouser get as low as 2.80 but never in stock. So far no-one carries 328's that I can find. Does anyone here know of a place...
Sunday, 11 April 2010 - 19:23
using port d as ADC, not going to work, right? atmega168
I just wanted to ask before I create an adapter. I have a device that connects to a db9 that is fixed on my board. In this case I need to check a pot connected to Pd3 on my...
Wednesday, 10 March 2010 - 03:27
Can pull a pin low?
I seem to have a predicament I cant solve. I have a atmega168 and I'm running some code like so. while(1) { PORTB &= ~0x3f;// DDRB |= 0x3f; } PORTB &= ~0x3f;// DDRB |= 0x3f;...
Monday, 8 March 2010 - 22:23
help with math
I have code that is trying to make a curve. My product in this case is a usb device. I dont have any form of out put other then that. The results are always 0, and I;m stuck...
Monday, 1 February 2010 - 21:30