Question about MK111 Timer - Get more delay

Hi all,

What must I do/change to get more pause between the puls.
Lets say about 15 minutes in stead of 60 sec.

kind regads,
Martijn

Increase the value of the large electrolytic cap.
Sorry, no values, please experiment.

Hi,

Afther testing I have change the R1 to 1M ohm and the C3 to 1000uF
Now delay’s of 20 minutes