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2. Passive infrared sensor - Wikipedia

   en.wikipedia.org/wiki/Passive_infrared_sensor

   A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors . PIR sensors are commonly used in security alarms and automatic lighting applications.

3. Twinspot - Wikipedia

   en.wikipedia.org/wiki/Twinspot

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us

4. Came glasswork - Wikipedia

   en.wikipedia.org/wiki/Came_glasswork

   Final products include a wide range of glasswork, including stained glass and lead light pieces. Came is made of different metals, such as lead, zinc, brass and copper. The metal came selected generally depends upon the size, complexity and weight of the project. As an alternative to came, copper foil may be used, for small, intricate pieces.

5. Lemon battery - Wikipedia

   en.wikipedia.org/wiki/Lemon_battery

   Diagram showing three lemon cells wired together so that they energize the red light-emitting diode (LED) at the top. Each individual lemon has a zinc electrode and a copper electrode inserted into it; the zinc is colored gray in the diagram. The slender lines drawn between the electrodes and the LED represent the wires.

6. Zinc-ion battery - Wikipedia

   en.wikipedia.org/wiki/Zinc-ion_battery

   Zinc production and proven reserves exist at a higher scale than lithium metal due to zinc’s use in galvanization and its broad geographic availability. [12] Other benefits of zinc metal as an anode material include its compatibility with both aqueous and non-aqueous electrolytes and its higher safety and lower environmental toxicity compared ...

7. Zinc sulfate - Wikipedia

   en.wikipedia.org/wiki/Zinc_sulfate

   Zinc sulfate is an inorganic compound with the formula ZnSO 4.It forms hydrates ZnSO 4 ·nH 2 O, where n can range from 0 to 7. All are colorless solids. The most common form includes water of crystallization as the heptahydrate, [4] with the formula Zn SO 4 ·7H 2 O.