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AVRISP clone from Digikits unreliable after a few months
An oscilloscope is definitely one of the things that I put on my "vorrei ma non posso" list (I wish but I can't). The main problem is that I'm definitely a hobbyist who has to...
Saturday, 14 November 2009 - 16:13
AVRISP clone from Digikits unreliable after a few months
Yes, the 78L05 is TO92. I did put the capacitors required (I learned that the hard way a long while ago :)), but I also tried a TO220 version (7805CZ? I don't remember exactly...
Saturday, 14 November 2009 - 13:59
AVRISP clone from Digikits unreliable after a few months
The programmer now seems to work most of the time, but ultimately the AVRs won't. I tried a simple int main(void) { DDRB = 0xff; PORTB = 0xff; while(1); } on two different...
Saturday, 14 November 2009 - 13:10
AVRISP clone from Digikits unreliable after a few months
That's a great idea, thank you!
Friday, 13 November 2009 - 23:51
AVRISP clone from Digikits unreliable after a few months
@stevech: considering I may go through another "halt" phase soon, I'd rather avoid buying an official programmer that costs at least twice as much. :) @SteveN: if the problem...
Friday, 13 November 2009 - 20:37
Identifying capacitors
Wow, and to think I bought these last year! Do capacitors lose their functionality as time goes by, or are they just as reliable? Thanks to both of you, you saved me from a lot of...
Monday, 16 March 2009 - 07:38
Identifying capacitors
Thank you for your answer. So, when the third digit is a zero, one should consider it as a whole number in nF (ie. 100 nF) rather than the exponent of the value in pF (ie. 10 * 10...
Sunday, 15 March 2009 - 23:28
Global variable not working properly after removing printf
avr-gcc -v tells me I'm using version 4.3.0. I installed the whole thing using AVR MacPack, but that was some time ago. I guess I could upgrade. ;)
Thursday, 14 August 2008 - 17:46
Global variable not working properly after removing printf
Thank you for the link, but the avr-libc was enough to write my own myprint_P and to get an acquaintance with the PSTR macro. I brought the .data section down to 264 bytes and all...
Thursday, 14 August 2008 - 17:32
Global variable not working properly after removing printf
lfmorrison: I might be, I'm not sure. Certaily I am having strange behaviors even though "state" has been fixed at that point. It seems that it easily changes to weird values that...
Thursday, 14 August 2008 - 16:43
Global variable not working properly after removing printf
It seems I got it to work with this in main.c: volatile uint8_t state = STATE_BOOTING; and this in usart.c: volatile extern uint8_t state; (I wonder: why did a simple "...
Thursday, 14 August 2008 - 16:31
Global variable not working properly after removing printf
Johan: it is indeed in another file, and it's declared as "extern state" (now I added volatile to it). It is not below my level, I not that great C programmer. ;) Indeed, in main...
Thursday, 14 August 2008 - 16:26

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