Quote:
Originally Posted by coachster
You'll need a fairly strong servo and a some gears to set a 40mm off. Design it so you can adjust the gear ratio. The motion sensing device is sound if you use it purely for it's electronics.
If you want an easier way, make a trap. Won't be 100% horizontal but possibly at 30 - 45 degrees. Use the sensor but put the nade in a tube that it can be pulled backwards. Like a mortar round dropping on a firing pin but you can use rubber bands or bungies to pull it back. Use the motion sensor to actuate a lock pin. Once retracted the nade is pulled back or falls.
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Moustrap, firing pin / striker, electric trigger ... profit.
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