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A mini laser module (Kidstoy) thats is mounted to the plasmahead, shines to a lightsensor with a cover a small hole in it.
The distance to the laser And the hole size determinte the angle when it shuts off . Good visible to reinstall if kicked over, simple , vibration resistant .
for reliable function the light (sender receiver ) should be modulated To not interfere with the plasma light..
aka industrial Laser light barrier
The distance to the laser And the hole size determinte the angle when it shuts off . Good visible to reinstall if kicked over, simple , vibration resistant .
for reliable function the light (sender receiver ) should be modulated To not interfere with the plasma light..
aka industrial Laser light barrier