The LED Fortune Teller

Design

Part of the Week 2 labs required students to make their own switching circuit with a switch of their creation. After thinking about the idea for a bit I saw a paper fan online and started thinking about those joke fortune tellers that everyone made as kids. I decided to make a circuit that would turn on an LED whenever a person’s “fortune” was told. I wanted to embed an LED in the fortune teller and have the person controlling the teller be make the switch connect whenever they wanted.

The circuit I designed was extremely simple and quick to prototype out on the breadboard.

Schematic 1. Basic Switching Circuit to turn on LED

Schematic 1. Basic Switching Circuit to turn on LED

Creation

Using copper tape I was able to make a switch that could be hidden underneath the fortune teller while it was being used.The process of creating the circuit was quite simple. The biggest issue was making sure that the connections made by the copper under the fortune teller were strong enough to make the LED light up.

photo of the circuit setup being created.

photo of the circuit setup being created.

The exercise and all labs were good refreshers on switches and basic circuit design/function.

Top Down view of working circuit.

Top Down view of working circuit.

The Rest of the Labs

Along with the creative switching circuit, the labs required students to put three switches in parallel with an led at the end, then modify the circuit to put the three switches in series and seeing how the circuit acted after that. Once those were completed a circuit with a small DC motor and switch was created and tested out. Finally, an led was added to the switching dc motor circuit.

Below you can see photos of each circuit.

Parallel Switching Circuit

Parallel Switching Circuit

Series Switching Circuit

Series Switching Circuit

DC Motor Switching Circuit.

DC Motor Switching Circuit.