Hands-on kits +
online lessons
to teach kids robotics electronics coding

Learn with our FREE online lessons:

* We will never ever ever share your email address


Purchase an EEME project kit to build a robotics electronics project. Batteries included - receive everything you need to get building. No experience required.

With kit in hand, go online for video & coding lessons that will teach your kid how to build the project & explain how it works
You can check out our lessons for free

What EEME kids said they learned in Oct 2016

Winner of Editor's Choice
Top Pick for Kids
How does the LED work?
If the circuit is complete then it will turn if you flip the on switch. But if you pull a piece out, it turns off. If you get the prongs confused on the LED, then the LED will break.
Why the LED stays off when the diode is in the circuit
The LED stays off when the diode is in the circuit because the diode eats up some of the voltage too, which leaves less than half of the electricity, which is not enough to power the LED.
A transistor is an electric switch
The transistor has three prongs that have different jobs. The left prong is the emitter and it emits the electricity. The right prong is the collector. The middle prong is the base. The collector is the one that collects all the electricity. The base is the switch. When the base gets electricity, the switch is turned on. When the base doesn't get electricity, the switch is turned off.
Diagram explaining the NPN and PNP in our motor circuit
When the left button is pressed, the PNP is on and the NPN is also on since the PNP middle PIN is getting voltage and the NPN middle PIN is at zero voltage. That makes the motor spin. If the right button is pressed only, then the NPN middle PIN is getting voltage which turns it off. But the motor is already off, since the PNP is off, so it has no effect. If both are pressed, then the NPN will be off, and even though the PNP is on, the motor will not be powered because the circuit is left open.
Capacitors In A Circuit - Small Capacitor
The small capacitor doesn't hold as much energy, so the light goes off faster than it did with the bigger capacitor.
Segmented LED Explained
The segmented LED light is a whole bunch of LEDs that share a positive prong in the middle of the other negative prongs
Create an account to learn
with our free online lessons