Experimental principle: This is a typical switch circuit. The battery provides power. The switch controls the on/off of the current. When the switch is turned on, the switch current flows...
Product Name: Science and Technology Small Production: Earthquake Alarm
Weight: about 55g
Dimensions: 8*6*12.5cm
Packing: opp self-sealing bag
General knowledge of seismograph: In 132 AD, Zhang...
Small production: homemade traffic lights
Baby material: wood+battery box+electronic components+red, yellow and green LED lights
The little kit is so great! Now it is changed to mosaic type, and the...
What is the measuring principle of vernier caliper in the small-scale production kit of science and technology?
Vernier calipers use the difference between the line spacing on the main scale and...