Grazzlin timers

[dunny123]

Hi i know grazzlin do a 24hour timer and every white switch is 15mins.
But what i am after is a timer with minutes an seconds.
So for instants i can set a machine to run for 20mins and defrost for 30seconds,and repeat this.
Do such timers exist?

[chemi-cool]

You will need a microprocessor-based device with a change over contact that will operate two relays, one for the defrost and another one for cooling through a thermostat contacts.

BTW, its grasslin and now it called Itermatic.

[philfridge]

Grasslin you mean try these
http://uk.rs-online.com/web/search/s...ime%20Switches

[dunny123]

Can you expain a bit more please,also where can i get these?
Thanks

[Brian_UK]

I think that Philfridge has given you the address

[dougdotcom]

Hi, have you tried Rs Electronics.?

[dougdotcom]

mmmm silly me you already have, egnore me today.

[dunny123]

Thanks for posting the link for rs,iv been on that site but carnt seem to find a timer that will do minutes and seconds,they are all 24hour timers where the diles are 15mins.
I will give rs a ring in the morning to explain what im after,thanks for your help.

[old_timer]

I'm an Ex-fridgie and new to air con but I have never seen so many dead timers, Grasslin timers, can't be programmed and won't hold information. I suspect the batteries are dying. Is anyone else having the same problem??