Timer with external adjustment
- Thread starter pinkfoot
- Start date
westaust55
Moderator
As circuit indicates, more information would be good.
As a starting point for a possible solution:
Use the READADC command to obtain a reading from the external pot (itself across the PICAXE supply)
Depending on the timing range/resolution you may use either the 8 bit or 10 bit version of the READADC command.
Since you mention the INC function then an alternative may be to use the value from the READADC with some scaling as necessary to determine a value for a PAUSE command.
Do you need to have other actions keep occurring while your timing operates to permit a task/command to be actioned?
As a starting point for a possible solution:
Use the READADC command to obtain a reading from the external pot (itself across the PICAXE supply)
Depending on the timing range/resolution you may use either the 8 bit or 10 bit version of the READADC command.
Since you mention the INC function then an alternative may be to use the value from the READADC with some scaling as necessary to determine a value for a PAUSE command.
Do you need to have other actions keep occurring while your timing operates to permit a task/command to be actioned?
Hi,thanks for reply I will try to be more explain with small prog:-
main:if pinb.0 = 1 and pinb.1 = 1 then
goto cut
end if
low b.2
goto main
cut:high b.2
if pinb.0 = 1 and pinb.1 = 1 then
goto cut
end if
goto main
if b.0 and b.1 are high then b.2 will stay high and if b.0 or b.1 are released then b.2 will go low that's fine, but I need a time limit on b.2 staying high
even if b.0 and b.1 are kept high.I have achieved it with INC command but can't work out how to adjust time externally,this is just a part of a larger
project.
Hope this helps, Regards
main:if pinb.0 = 1 and pinb.1 = 1 then
goto cut
end if
low b.2
goto main
cut:high b.2
if pinb.0 = 1 and pinb.1 = 1 then
goto cut
end if
goto main
if b.0 and b.1 are high then b.2 will stay high and if b.0 or b.1 are released then b.2 will go low that's fine, but I need a time limit on b.2 staying high
even if b.0 and b.1 are kept high.I have achieved it with INC command but can't work out how to adjust time externally,this is just a part of a larger
project.
Hope this helps, Regards
So to put it another way, you want some input conditions to start off an output for a limited time only. You want that time to be adjustable by external pot. At the end of that time, or if the input conditions change, the output is to go low.
It will help if you can describe the time frame here - milliseconds, hours, weeks? - affects the options.
It will help if you can describe the time frame here - milliseconds, hours, weeks? - affects the options.