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How to Make a Lemon Battery

When life gives you lemons, the EEME team makes batteries! We then used the lemon batteries to power one of our hands-on projects - Project Genius Light.

Check out the video of Operation: Lemon Batteries:

If you want to build your own lemon batteries, here are the parts your need:

  • Lemons - the bigger, the juicier the better!
  • Zinc - we bought galvanized roof flashing from Home Depot and cut smaller pieces out ourselves with metal shears. You can also use galvanized nails.
  • Copper - we bought the thinnest copper rod from Home Depot in the electrical department.
  • Wires - we used 24 gauge stranded wire. Any color works. You will need wire strippers to strip the ends of the wire to expose the metal strands/core.

Lemon Battery Materials

Lemon Battery Completed

The video should show and tell what you need to do to make the batteries. We tried to keep the video short and to the point. For more information about how the electronic components and circuits work, check out our online lessons and monthly hands-on projects.

In the meantime, share this cool project with friends and family. Drop us a note if you have any questions or feedback!

Enjoy and happy building!

Jack "EEME Dad"

PS - EEME's a small shop. So please help us spread the word by sharing with the buttons below. Thx!

Building an Audio Morse Code Generator

EEME makes hands-on projects and online lessons to teach kids electronics.

With the components from our monthly subscription project kits, you can actually build electronic devices outside of what we define.

Here we’ve built a circuit which you can use to generate audio morse code - a code to transmit text with sound.

Digital camera is an IR detector

This Morse Code Generator uses the buzzer, resistor, and push button components from 2 of our monthly projects - Project Tentacles and Project Fade To Black - and is built on our breadboard and battery pack platform - all of which we provide in our monthly project kits.

Watch the short video clip below to see the circuit in action.

To learn how the breadboard and circuit works, check out our free online lessons which will allow your family to understand how this morse code generator is wired together with the breadboard.

Can you tell me the word we morse coded in the video?

If you are not a monthly subscriber, you can also build this circuit with the following components - available from a store like Radio Shack:

  1. A piezo buzzer
  2. A resistor (any value less than 5k Ohms should work)
  3. Wires
  4. A “normally-off” pushbutton
  5. A pair of AA batteries
  6. A breadboard
  7. (Optional) - battery holder

Thanks and happy building!

Jack "EEME Dad"

PS - EEME's a small shop. So please help us spread the word by sharing with the buttons below. Thx!

Teaching kids with real electronics components

EEME commits itself to teaching kids electronics with real electronic components that practicing engineers use to build circuits - not snappy toys or magnetic widgets.

Our commitment to using real electronic components is apparent in our monthly hands-on projects.

But our FREE online lessons also stay true to this commitment. Your kid virtually builds a circuit on a "real" breadboard, using "real" resistors, LEDs, capacitors, etc.. Our free online lessons parallel the handling of real electronic components in the physical world in a virtual online environment.

At the end of the day, by building with real components at an early age, we will develop our kid's:

  1. Dexterity in manipulating things carefully
  2. Confidence in knowing they are using "adult", "real" pieces
  3. Patience and grit to complete what they start
  4. Attentiveness to following instructions

... nurturing the foundation for them to invent and build the digital devices of tomorrow.

Digital camera is an IR detector

Happy building!

Jack "EEME Dad"

PS - EEME's a small shop. So please help us spread the word by sharing with the buttons below. Thx!

What Electronics Concepts EEME Teaches Our Kids

EEME makes "not-so-easy" hands-on projects to teach kids ages 7 and older electronics. Each project is paired with online curricula to not only show how to assemble the project, but more importantly, the online curricula also teaches the kids the electronics concepts applied in the project.

While we are big on stating this fact, we realized we do not publish exactly what is taught anywhere online.

WHOOPS! (embarrassing giggle)

EEME Dad Whoops

Better late than never - we added this information to your dashboard which is accessible when you log in or sign up (for FREE).

As an example, the first 6 projects from our monthly subscription are:

  1. Project Genius Light
  2. Project DIY Display
  3. Project Tentacles
  4. Project Attraction
  5. Project Fade To Black
  6. Project Countdown

After building these monthly projects, your kids will learn about all the fundamental concepts and components of electrical engineering:

  1. LEDs
  2. Resistors
  3. Capacitors
  4. Photoresistors
  5. Transistors
  6. Electro-magnetism
  7. … much much more

If you want more details on the specifics for each of our projects, please visit us and check out the online lessons and video curricula for free.

And lastly, even if you are not ready for our hands-on projects, please sign up anyway to access our FREE online lessons!

Don’t hesitate to reach out with questions!


Jack "EEME Dad"

PS - EEME's a small shop. So please help us spread the word by sharing with the buttons below. Thx!

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