I'm glad to read that last entry by Michael... I thought I was the only oddball in the world doing this.
I never use a timer, I count. The metronome is set at 1 second intervals. Turn on the enlarging light and hold a card under the lens. Move it away to expose the paper and count. When you're done exposing, move the card over the lens and turn the light off. Good for enlarging and contact printing, test strips - everything. Edge burning for enlargements is especially easy doing this.
I leave the thing beeping the whole time I'm working. You'd think the sound would drive you crazy, but it's nice. It's comforting. Do this about 6 times and you won't be able to use a timer again... maybe.
I bought mine in a music store for about $20.00. It's electronic!
Anthony - Fine Art Photo Supply