Science technology primary science experiment DIY invention corridor double control lamp science education toy wholesale factory
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Description
Objective course: learning physical circuit diagram
Double control switch: it can have two switches to control lamps and other electrical appliances
For example, turn on the switch downstairs and turn off the switch upstairs. If the traditional switch is adopted, if you want to turn off the light, you have to run downstairs to turn it off. With the double control switch, you can avoid this trouble.
Now let's teach you how to make double control lights in the corridor:
1. Ordinary stair switch can only control electric light in one position
2. Double control switch in the corridor, which can control the lights upstairs and downstairs
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