On Sat, 14 May 2011 19:34:50 -0500, dpb wrote:

On 5/14/2011 5:26 PM, Doug Miller wrote:
...

And right there is your problem. Use an *un*lighted doorbell, or disconnect
the light.

Or find one that has a set of contacts that aren't connected to anything
else (or modify the one you have). There's no reason you can't have a
light; it just can't have the diode across the contacts.

But that's where it gets its power, right? Works fine when you use it
for a doorbell. It's these newfangled gadgets like those goldarn
geerage door oapners that cause trouble.

I don't think the OP is the one to be putting in a separate power
supply, or a transformer and latching relay.