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DS1307 RTC time not advancing
...well about 15 seconds per week typically, with an out-the-box 20ppm crystal. Not sure what "software clock" you are talking about - by having a DS1307 in the hardware you...
Wednesday, 25 May 2011 - 07:13
DS1307 RTC time not advancing
When you've got it working, you need to investigate something cleverer than reading it every 0.1 seconds - program the SQW/OUT pin for 1Hz output, feed that into an interrupt (use...
Tuesday, 24 May 2011 - 07:37
Tachometer input to mega8
A lot of people do use Codevision AVR and very good it is too (other compilers are available). It would be nice if the Code Wizard used the bit names rather than magic numbers e.g...
Tuesday, 17 May 2011 - 22:49
Slow rising signal on external interrupts
Hmmm...KISS maybe applies - no interrupts - main loop polling of the INT0 pin (PIND.3 - CVAVR) just checking if different to last time and currently high (rather than checking a...
Monday, 9 May 2011 - 00:27
Slow rising signal on external interrupts
Thanks Martin. Definitely multiple interrupts - strobed an output pin inside the ISR and there they were :( Have breadboarded a schmitt trigger comparator with an LM324 and that's...
Sunday, 8 May 2011 - 22:40
Tag-Connect
I guess not then?
Wednesday, 4 May 2011 - 21:22
Problem with external interrupts
How does your version of Proteus model PCINT pins that are "floating" ie are disconnected when your buttons are not pressed. It would be normal to have pull down resistors on each...
Wednesday, 13 April 2011 - 10:26
atmega8535 and its eeprom reading problem ,halting 4 cycles
It is very easy to use CodeVision EEPROM support - read the manual, declare variables as being in EEPROM and just use them as normal. Why are you making things so hard?
Saturday, 9 April 2011 - 11:52
atmega8535 and its eeprom reading problem
clawson wrote:But PLEASE tell us ... why you are not using the C compiler's supplied EEPROM support?It is very easy to use CodeVision EEPROM support - read the manual, declare...
Saturday, 9 April 2011 - 11:52
DS1307 Accuracy
...but Joseph1 seems to have wandered off, with or without our expertise, and is apparently not listening any more :(
Friday, 8 April 2011 - 07:40
Newbie Syntax question
All that PICAXE shield talk got you over here then DR :)
Thursday, 7 April 2011 - 19:12
DS1307 Accuracy
If your 1 second is too fast (say every 0.99 seconds) then you might read the same time from the DS twice in a row - but your overall accuracy will be the same as the DS The...
Thursday, 7 April 2011 - 08:09

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