Enhanced Phone Charger Overview

As a TA for junior design at SCU, I had to create a project for the students to design and build.  A USB phone charger was chosen.  After the class was over, I decided to build a new phone charger with all the "lessons learned" and some additional circuitry.  The PCB components were hand soldered.  I built a total of 10 of these devices and gave them away as gifts to people.  The bottom of each case has the person's name 3D printed on it.  There are two LEDs on the top of the device.  The illuminated LED in the picture below indicates the output power is turned on.  The other LED is the charging status.  When the charger is recharging the battery, the charging LED will be orange.  When the battery is done charging, the LED will turn green.  The small square above the LEDs is the on/off button.  A latching transistor is toggled by pressing the button.


Enhanced Phone Charger Pictures

Charger PCB, Top View

Charger PCB, Top View

Charger PCB, Bottom View

Charger PCB, Bottom View

Charger Disassembled

Charger Disassembled

 
Charger Assembled

Charger Assembled

 

Enhanced Phone Charger Schematic

Charger Schematic

Charger Schematic


Enhanced Phone Charger PCB Design

 
PCB Top Layer

PCB Top Layer

PCB Bottom Layer

PCB Bottom Layer

 
PCB Power Layer

PCB Power Layer

PCB Ground Layer

PCB Ground Layer

PCB Top, Bottom and Silkscreen Layers

PCB Top, Bottom and Silkscreen Layers


Enhanced Phone Charger CAD Enclosure

Charger Enclosure

Charger Enclosure