Price:
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)