Solid state safety.

[weartronics]

One *additional* interlock that you might like to consider is a car alarm tilt switch. I have never seen it used for this purpose, but I think it could be very useful for projectors which are mounted such that gravity wills them to point into the audience. You can position your projector at any angle, and that angle is sensed when it is turned on. Then the interlock is triggered if it changes by more than 1 degree, or more than 3 degrees (selectable). This means that projectors which slip on the rigging (or rigging that sinks in to soft ground) won't suddenly beam the audience. The cost is about $20. Best regards, weartronics

[Lasernerd]

One *additional* interlock that you might like to consider is a car alarm tilt switch. I have never seen it used for this purpose, but I think it could be very useful for projectors which are mounted such that gravity wills them to point into the audience. You can position your projector at any angle, and that angle is sensed when it is turned on. Then the interlock is triggered if it changes by more than 1 degree, or more than 3 degrees (selectable). This means that projectors which slip on the rigging (or rigging that sinks in to soft ground) won't suddenly beam the audience. The cost is about $20. Best regards, weartronics

one of my first projectors I used a mercury switch!

[White-Light]

One *additional* interlock that you might like to consider is a car alarm tilt switch. I have never seen it used for this purpose, but I think it could be very useful for projectors which are mounted such that gravity wills them to point into the audience. You can position your projector at any angle, and that angle is sensed when it is turned on. Then the interlock is triggered if it changes by more than 1 degree, or more than 3 degrees (selectable). This means that projectors which slip on the rigging (or rigging that sinks in to soft ground) won't suddenly beam the audience. The cost is about $20. Best regards, weartronics

I must admit wear this has been something that's been puzzling me for a while. Most mounting brackets seem to be mounted slightly balanced towards the front of the projector so in the event of a lock failure the projector swings forwards. The same can be said of safety wire mounting eyes - always towards the back.

Surely the cheapest protection against bracket lock failure out there is simply to mount the brackets with the weight balanced to the back so the projector swings upwards in the event of bracket lock failure and safety cable eye to front edge also for the same reason in the event of total bracket failure. Gravity is your friend in this situation.

[heroic]

Gravity is your friend in this situation.

Would you be prepared if gravity reversed itself?

[buffo]

Would you be prepared if gravity reversed itself?

"The only think I can't figure out is how to keep the change in my pockets... I've got it: Nudity!"

Real Genius rocks.

Adam