[dsavitsk]

For a current project I am working on, I would like to a) be able to switch multiple things with one switch, and b) set up a several second timer to shunt output to ground until a circuit fully powers up. It appears to me that relays can be used in both of these situations, but I am unsure of the distinctions between different types of relays.

For the first use, I would like to switch several outputs as well as LEDs. I could use a 6pdt switch, but these are hard to find, so I think relays would be easier. For the second, this circuit http://myweb.tiscali.co.uk/nuukspot/...ne2.html#delay seems workable, but I am still unsure of part numbers, etc. (the one mentioned in the article does not seem to be available in the US from the normal suspects.)

Thanks for any pointers,

-d

 

[amb]

Quote:

Originally Posted by dsavitsk For the second, this circuit http://myweb.tiscali.co.uk/nuukspot/...ne2.html#delay seems workable, but I am still unsure of part numbers, etc. (the one mentioned in the article does not seem to be available in the US from the normal suspects.)

The Tyco RT424012F (12VDC DPDT with 8A contacts, available from Mouser) is a good candidate for this circuit.

 

[Garbz]

there was a thread a few months ago discussing the type of relays to use for audio switching applications. I think we concluded to use:

Either:
Reed relays

Or:
Standard relays which are telecom grade
silver / gold contact relays
high coil impednace
sealed

etc.