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Add some video hints to Science Lessons (#2580)

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* Home page cards for 'Science Experiments' videos

* Insert link sections for experiment vids

* Other link in spots
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Galen Nickel
2020-01-14 14:35:47 -08:00
committed by Peli de Halleux
parent faaeb7a19e
commit 28d3bdd4f4
8 changed files with 92 additions and 1 deletions
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docs/courses/ucp-science/soil-moisture/setup-procedure.md
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@ -8,6 +8,16 @@
4. Experiment with different data collection scenarios.
5. Add enhancements to the program and project.
### ~ hint
#### Soil moisture experiment video
Watch this video about to see how to conduct a soil moisture experiment for plants.
https://youtu.be/n0WRQf11Pzo
### ~
## Background
This project will use 2 pins on the @boardname@ to measure the voltage between the **3V** pin and the pin **0** as the current travels through the soil. Wires or alligator clips are used to connect to the @boardname@. In the soil nails or larger wires are used as probes in the soil. The nutrients along with the moisture in the soil will allow an electrical current to travel through the soil. The more moisture in the soil the greater the voltage that is measured. Wet soil should have a reading around `1000` on a scale of 0 - 1024. Dry soil will give a reading of around `250`.