Variable Light Box

Why?

This is a project completed as of Saturday April 10, 2021 for BME 473. In this project I planned, breadboarded, and constructed a box. With the aid of programs such as KICAD and OnShape, I was able to design and construct a small box that encased a PCB, switches, and rotary potentiometer, and an LED. Building this device was a great way to dive into a simple project and a comprehensive design process.

What does it do?

The light turns on, can be set to blink, and the intenisrty can be modified. The battery can be switched out in less than 20 seconds and the box can survive a drop test.This LED could be set to stay continuously lit or blink at 2 Hz at a 50% duty cycle. This LED could also be varied in its brightness using a rotary potentiometer.

How does it work?

Switches turn on the device and can set the setting to constant or blinking. A potentiometer (knob) is used to modulate pulse width in order to alter brightness of the LED.

Below are 3D CAD renderings of its construction, the PCB design and its underlying schematic, and a video of me showcasing its functioning.