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

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)