HankMcSpank
- 8th July 2010, 00:43
Hiya,
I'd like to make a countdown timer for a UV lightbox I have - they were throwing out an old Eprom eraser out at work - a bit of a result *but* it's got a really bad mechanical timer on it & it's not granular enough for my needs (0-60mins...I need more like 1-10 mins)
10 mins being 600 secs, which in picbasic equates to
PAUSE 600000
Eeek!!!!
Any issues with such a long pause command?
To set the countdown time, I was thinking about a simple pot arrangement - ie AtoD the value between 0 & 1024, where 1024 = 10 mins.
Also I guess it would be nice to have some adjustable 'user presets' - how do I tackle storing user input into non voltaile ram on a PIC? (if it helps, I'm using a 16f690 for no other reason than I'm sort of getting used to it)
PS I realise when the pic is 'pausing' it's not gonna give out any countdown (time left) info, but I'm not too worried about an elegant implementation with many bells & whistles here.
Edit: Ok, with a view to creating the most simple of programs I'd overlooked the most basic of solutions (why does that happen immediately after pressing the post button). A simple loop with a 1 second pause in it would do here - and then keeping track of the number of times the loop has run. (this will translate into an approximate time for the job in hand)
I'd like to make a countdown timer for a UV lightbox I have - they were throwing out an old Eprom eraser out at work - a bit of a result *but* it's got a really bad mechanical timer on it & it's not granular enough for my needs (0-60mins...I need more like 1-10 mins)
10 mins being 600 secs, which in picbasic equates to
PAUSE 600000
Eeek!!!!
Any issues with such a long pause command?
To set the countdown time, I was thinking about a simple pot arrangement - ie AtoD the value between 0 & 1024, where 1024 = 10 mins.
Also I guess it would be nice to have some adjustable 'user presets' - how do I tackle storing user input into non voltaile ram on a PIC? (if it helps, I'm using a 16f690 for no other reason than I'm sort of getting used to it)
PS I realise when the pic is 'pausing' it's not gonna give out any countdown (time left) info, but I'm not too worried about an elegant implementation with many bells & whistles here.
Edit: Ok, with a view to creating the most simple of programs I'd overlooked the most basic of solutions (why does that happen immediately after pressing the post button). A simple loop with a 1 second pause in it would do here - and then keeping track of the number of times the loop has run. (this will translate into an approximate time for the job in hand)