4-H Electronics Project 2006

A simple game of illuminating LEDs

This post is one of a six part series documenting and archiving Nathan’s electronic projects created during his years participating in 4-H. To be clear, this project was done many years ago. During the winter months of 2017-2018, Nathan decided to archive his past projects as a way to remember and share them, hoping to inspire other beginning electronic hobbyists.


This project is a simple game: the goal is to illuminate LEDs by positioning metal balls on channels created by two horizontal nails on the game surface. The angle of the hinged game surface is changeable by raising or lowing its handle. Multiple LEDs can be illuminated at one time, since there are two balls in use. The lever labeled “Press Here” must be pushed to complete the circuit and play the game.

Below you can see the electrical schematic that this project implements. It should be apparent that this is a very simple project… Good for a nine-year-old. ;)


View the PDF version: click here.

Circuit schematic

Original 4-H Report

The text written below is directly from Nathan’s report given with this project at the 4-H Exposition of 2006, when Nathan was nine years old.

The way I made this game is my dad cut the wood pieces. I sanded all the pieces and nailed and glued them together. Then I stained them and put polyurethane on the wood pieces. After they dried, I hammered the nails into place for the wires. Next I stripped the plastic from around the wires and wrapped the wire around the nails. My dad helped me solder on the wires to the nails; he held the soldering iron while I used the solder. There are 3 simple switches connected to the LEDs. The balls complete the circuit. I learned that LEDs can”burn” out if they have too much voltage through them so I needed to add a resistor.

To play my game, you should press the “press here” switch, and try to get two LEDs on by positioning the balls between two different sets of nails.


View of game from user perspective
Hinged handle used to move balls down channel
Red LED illuminated due to ball contact with nails
Multiple balls can be used to turn on more than one LED at a time
The circuit soldered to nails on the display board
LEDs for indication of game status
LEDs soldered to nails
Two nails and a metal ball create switches per LED
Custom switch for playing game
A leather strap neatly holds a 9V battery