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Timing

C

Curt Dahlen

Jan 1, 1970
0
Im building A timer and i want to make 1,-4,5,6min intervals by a switch
to select different resistors, But I'm not sure the right way to figure
out the formula for time, or is this right and its just not that acurate

timing = 1.1 C1 X R1
 
C

Costas Vlachos

Jan 1, 1970
0
Curt Dahlen said:
Im building A timer and i want to make 1,-4,5,6min intervals by a switch
to select different resistors, But I'm not sure the right way to figure
out the formula for time, or is this right and its just not that acurate

timing = 1.1 C1 X R1


You need to provide more information. The formula depends on the type of
timer you're using. If you're using the 555 as a monostable, then the above
formula is correct. Select a C and vary R to get the timings you want. Then
measure with a watch to verify and tweak as necessary.

Costas
 
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