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US$2.69

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DIY Traffic Light Electronic Building Stem Model Education Science Physical Experiment Kid

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                  Specification:
                  Color: As picture shown
                  Material: Wood +  Plastic
                  Battery: 2 X AA Battery (Not Included)
                   
                  Features:
                  – Assisting teachers and parents in better traffic rules teaching.
                  – Enrich children's leisure life, cultivate hands-on ability, and consolidate knowledge.
                  – Let children learn traffic light knowledge, hands-on, to form a simple traffic awareness.
                   
                  Matters needing attention:
                  √The blue wire on the diode is the positive pole of the LED lamp and the red wire is the negative pole.
                  √The voltage range of red and yellow diodes is 1.8-2.2V, so add a resistance voltage limiting to keep the red and yellow diodes from burning down.
                   
                  Installation Tips:
                  – install the bracket first.
                  – Connect three blue wires together to form a resistive voltage limiter
                  – The resistance is connected to the black wire of the battery box, and the three red wires are connected to the three screws of the bottom plate respectively.
                  – The wire is tied to the wood bracket with a strap.
                  – Clamping the screw with the crocodile to control the conversion of three traffic lights
                   
                  Package included:
                  1 x Traffic Light Experiment Kit (Does not contain battery)

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