导电性测试仪

第 1 步：制作

它是什么？

使用您的micro:bit和两条鳄鱼夹线来探究材料的导电性——轻松完成一个简单的科学实验！

如何使用

• 将下面的代码上传到您的micro:bit，或者跟随视频自己完成代码的编写。
• micro:bit的底部有五个大的触点。 当您将1号引脚和GND地线引脚用鳄鱼夹线连接起来，就形成了电流通路
• 安全须知不要将GND和3V引脚直接连接起来，否则可能损坏您的micro:bit
• If you attach two crocodile clip leads, one to pin 1 and one to the GND pin, you can put a material such as silver foil or cling film between the ends of the two leads to test if the material is conductive or an insulator.

工作原理

• The project uses selection. If an electrical circuit is made (because the material conducts) then the micro:bit will show a heart on its LED display and play the note Middle C.
• Else, if a circuit is not made, the micro:bit will clear its LED display and a note will not play - the micro:bit is instructed to play a note at a frequency of 0Hz.
• The program uses a forever or infinite loop to keep on testing until you disconnect your micro:bit from a power supply.

所需材料

• micro:bit (or MakeCode simulator)
• MakeCode编辑器
• 电池组（推荐，可选）
• our pins introduction video may be useful

You may like

The Conductivity tester recording sheet can be used to record which materials conduct and which do not in a classroom or coding club.

第 2 步：编程

1from microbit import *
2import music
3
4while True:
5    if pin1.is_touched():
6        display.show(Image.HEART)
7        music.play('c')
8    else:
9        display.clear()

第3步：完善

• Adjust the code to show a different icon or play a different sound if the material is conductive.
• Try out a wide range of materials with your conductivity tester such as pencil graphite, PlayDoh, and dry and damp tissue paper.
• It can be fun to use a human being as the test material! Simply hold the crocodile clip leads in both hands, or form a human chain.