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Here I make LED drawing copy pad for all students.
For this, you need 15 LEDs and acrylic sheet. You only need to stick acrylic sheet and place LED panel inside this.
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Step 1: LED Connection
Take 15 No of LEDs and Solder these LEDs in Parallel connection as per Picture.
First of all, you need to cut extra wire of LEDs and then take the soldering iron and tin wire to solder this 15 LEDs.
Step 2: Wire Connection
Then get one black and red insulated wire and solder to a negative and positive pole of LEDs.
Then get two shrinking tubes and protect from shortcircuiting.
Step 3: Charging Module Connection
Then Get one 3.7 Volt Charging Module and solder second and of black and a red wire to negative and positive respectively.
Then connect Data cable to this charging module and OTG pin to your smartphone and connect together.
If your connection is perfect then the lights will glow.
Step 4: Make PAD
Take one Clear acrylic sheet in a dimension of 30 X 26 cm and remove the protected cover from the back and front side.
Step 5: Polishing for Diffusing LEDs
Take one small pease of glass paper and polish front side of the acrylic sheet.
During the polishing, you need to check the polishing is better or not?
Step 6: Stick One Foam Sheet
Take clear glue and one 30X26 cm white sheet and stick this foam sheet to back side of an acrylic sheet.
Step 7: Joint Frame
Get two pease of 4 X 26 cm black acrylic sheet.
Then stick clear acrylic sheet to end of black sheet as per pic.
Step 8: LED Panel Fitting
Take LED panel which we making and place this inside black acrylic sheet.
Then provide cover using a second acrylic sheet.
Step 9: Enjoy!
Your LED Copy pad is ready for use.
Take one drawing print and one plain paper.
Then turn off room light and turn on the LED pad.
You can see drawing lines of printed paper and you can draw exactly on plain paper.
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