Technovation
Curiosity Machine: Challenges: Engineer an Electronic Water Level Detector
Make a device that will notify people when the water level drops in this challenge. Students will do this by building an open circuit that completes when the water level drops below a certain level and/or goes above a certain level. The...
Khan Academy
Khan Academy: Electrical Engineering: Amplifiers
Amplifiers make signals bigger. Amplification is often the most basic operation of an electronic circuit. There are many kinds of amplifier designs. We will describe the operational amplifier, the building block of most analog electronics.
TeachEngineering
Teach Engineering: The Path of Electrons
Students engage in an interactive "hot potato" demonstration to gain an appreciation for the flow of electrons through a circuit. Students role play the different parts of a simple circuit and send small items representing electrons...
Science Buddies
Science Buddies: Waste Not, Want Not: Use the Microbial Fuel Cell to Create Elec
Gross. What is that in the toilet? But maybe it's not just gross. Did you know there are bacteria that digest organic waste and create electrons? What if there was a way to collect those electrons to power a circuit? In this science fair...
Science Buddies
Science Buddies: Go, Gadget, Go! Building Robots With Lego Mindstorms
In the mid-20th century, people thought of robots as futuristic tools. But in the 21st century, robots are not a figment of our imaginations, but are a part of our reality. Robots even perform tasks that humans can't do. In this...
Other
Science Stock Photography
This site has numerous pictures of microscopic images. It also has a search engine so you can find specific objects. Images were captured with light microscopes, as well as electron microscopes.