Bill board trivision

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This is a bill board trivision with cell impact sensor.
- mi-ca adding blacklist film 2mm-3mm.
-ball bearing d=0.5mm.(625).
- tube fiber glass d= 0.5mm (hole d 0.3mm,r 0.15mm)+ motor
- led 3v ,1w .
- Relay 1 channel connect with sensor .adaptor power dc 5v .
- Endstop switch.
- The spring should be 0.5mm steel,height 2.3 cm.3mm step s