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Diy Color Printer

Diy Color Printer uses the printing method of red and blue copy paper, and completes the printing experiment by roller, tracing pen, cartoon paper, cartoon film and other tools. Understand the development history of printing in China (engraving printing - movable type printing - cylinder printing)

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Toys Auto Vacuum Cleaner

Through the transmission of gear set and the ingenious combination of movable baffle in time, Toys Auto Vacuum Cleaner can realize obstacle avoidance, turning, dust collection and other actions, and realize mechanical automation. The structure, principle and application of vacuum cleaner are understood through experiments.

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Lie Detector Experiment

Lie Detector Experiment makes use of the characteristics of human lying, such as pulse acceleration, blood pressure rise, subcutaneous sweat gland secretion increase, which leads to skin sweating. Through the skin resistance on the finger to detect the change of contact point, through the oscillation comparison circuit to realize, understand the characteristics of human lying and the application of electronic circuit.

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Camera Experiment

This Camera Experiment uses the light reflected by the subject to focus through the camera lens (scene lens) and the shutter that controls the exposure amount. After the subject forms a latent image on the photosensitive material in the dark box, it forms a permanent image after processing (i.e. developing and fixing).

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Gear Set

This Gear Set uses rack, belt, turbine, vortex rod, umbrella gear, flat gear and other transmission modes, through experiments to understand the advantages and disadvantages of various transmission devices, such as noise, transmission ratio and change of transmission direction.

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Constellation Instrument

Constellation Instrument is composed of a rotatable constellation image and a base with elliptical opening and time scale. The constellation image is projected into the arc-shaped simulated sky by using projection imaging, and the actual star sky can be displayed in different days and times by rotating the constellation image. Through the experiment to see the starry sky, recognize the constellation, stimulate students' interest in exploring the universe.

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