555 timer circuit

burtonfamily_at_dodo.com.au
Date: 12/29/04 

Date: 29 Dec 2004 03:22:31 -0800

Hello,I made a simple astable 555 timer circuit the same as the one on
the 555 web site,but im having trouble working out the values of the
two resistors and the capacitor so it will turn on for 3 minuts and off
for 5 minuts.Could someone please point me in the right direction as i
found the data *** a bit confusing.thankyou in advance