[DESIGN PRINCIPLE] The electromagnetic swing kit operates on the principles of electromagnetic induction, harnessing the fascinating properties of Hall effect sensors. As the magnetic field fluctuates, it propels the pendulum needle into a mesmerizing dance. [RGB LED LIGHT]Adding to its allure is the inclusion of a dynamic RGB LED light. This feature not only enhances its functionality but also transforms the swing into a captivating spectacle of light and color. With a spectrum of hues at its disposal, it paints the surroundings with a vibrant glow, enriching the visual experience. [SIMPLE INSTALLATION]The assembly process is straightforward, featuring uncomplicated components and clearly printed circuit boards. Product name: Electronic Swing DIY Welding Kit Working voltage: DC5V (5.5mm DC socket) Product function introduction: Hall sensor is a magnetic field sensor made according to Hall effect. When the magnet is above the Hall sensor, the Hall sensor detects the magnetic field, it will output a low level, the triode Q1 will no longer conduct, the tertiary tube Q2 will conduct, in the conduction process, the current flows through the inductor L1 , will produce a magnetic field in L1, the direction of the magnetic field is determined by the direction of the current flow in the coil, following the right-handed helix rule, when the coil's magnetic field and the magnet's magnetic field repel each other, the magnet will be Push away, the magnet is pushed away, the Hall sensor will no longer detect the magnetic field, it will output a high level, Q2 is no longer conductive, and L1 on the residual potential dissipated by D1. Thus repeating, the electronic swing will keep swinging. Colour:green+transparent Material:PCB+electronic components+acrylic Depending on the batch, the electronic components may be different, but s does not affect use.Without DC power cord Package Contents: 1 x DIY Electronic Swing Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.