Maybe not as important for you as for the Fireworks-Shooter guys but worth considering...
Hey Terry, you back Stateside again?
i am wondering if i should install this pull down resistor to stop the input pin from floating or not, my main concern is external interference causing the opto to light and trigger the input.
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16