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The LCD backpacks serve to solve the main problem with using LCD which is the large number of pins required to control the LCD
Please check Video below as we used it in future elecronics (Arduino Egypt) for remote control of pan-tilt mechanism
It is fully assembled with stepper motor
(datasheet)
Adjustable analog output
Magnetic Door Switch 220 V - 50 W desoldering pump The LCD backpacks serve toDoor switch sensor used for Home security for alarming doors and windows when they are opened. Contacts are closed when magnet and sensor are together. The sensor consists of two main parts, a magnet and as switch with terminals to connect the signal wires. The magnet mounts to a door or access panel, while the switch mounts to the frame. When the door is closed the two pieces should be in close contact of each other. When the door opens this distance
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