In this Instructable I am going to show you how to use a phone as a battery charger, and make a glow in the dark Logo or picture frame.
I got the Idea of a glow in the dark Logo from Instructables Q&A when another member asked about a phone LCD pin outs (Liquid Crystal Display) looking for the backlight LED pins. (Light Emitting Diode)
Step 1: Wireless Phones As a Battery Charger
The batteries come in two standard voltages and a variety of millamp hours, 3.6 Volts from 300 Mah to 900 Mah and 2.4 Volts from 300 Mah to 700 Mah Ni-Cd batteries. However they come with a variety of different connectors.
Step 2: Converting a Phone Into a Battery Charger
Start by removing the battery cover on the back of the phone by pressing on the top of the battery cover and pulling it down.
Once you have the battery exposed unplug it and put it to one side.
Inside you should find two screws and a sticker indicating battery polarity, if the battery polarity is not indicated inscribe the polarity yourself.
Then remove the screws and carefully pry off the back of the phone.
Step 3: The Battery Socket
Then reassemble the phone and attach a battery to the pins making sure to connect it to the pins with the correct polarity, the first time one of these batteries are charged it can take up to ten hours.
After that just place the phone in the charger and charge the battery, changing the battery as the dead ones become fully charged.
Step 4: Glow in the Dark Logos and Picture Frames
I have done something similar to this with flat screens from computers.
Step 5: LCD Module Construction
A lot of these phones are made with COG LCDs, (Chip On Glass Liquid Crystal Display). COG LCDs have the control IC on the LCD taking less room on the circuit board for the control IC. (Integrated Circuit)
The LCD module of these phones is constructed much like most LCD modules and they consist of:
Optical Plastic Layer
Step 6: My Glow in the Dark Logo
The LCD is constructed much the same as the LCD on smaller phones, the backlight consisted of a reflective layer an optical plastic layer and a LED strip made out of eight LEDs two in series making four lines in parallel.
Step 7: Tools and Parts
Optical Plastic Layer
9 volt battery terminal
9 volt battery
Trim for framing
Step 8: Assembling the Logo
Then I cut the positive wire in two and soldered the switch onto the positive wire.
Once the wiring is assembled I tested the LED strip to make sure it is working.
It’s that simple.
Step 9: The Logo
Place the optical plastic on the face of the logo making sure to have the etched side of the optical plastic towards the Logo and attach the LEDs making sure the LEDs face the edge of the optical plastic.
I used tape to hold the logo together and tested it to make sure it worked as planned.