UV-Box

Description

Make an UV Box for PCB etching.

Goal

• To be able to insolate presensitized copper boards.
• Insolate double sided copper boards.
• Use a timer (optional)
• Display time left (optional)

Obstacle

A list of potential obstacles

Components

• UV LED (200x): description
• (Alim)
• Box (wood, suitcase,...?)

LED Panel

I propose we make an LED panel for the UV box. A guy from PTL is doing the same thing (UV Box for DNA analysis), and Sasha is interested in making a white LED panel. The panels, when bought online, cost a lot due to their large size and weight (shipping costs), but it would be fairly cheap to build them ourselves. Here are some pics of the way they are made:

File:LED Pannel datasheet 600x600-EN.pdf

Case study

Component:

• UV LED 5mm
• Forward voltage: 3.2 - 3.4 V
• Max. current: 20 mA
• Angle: about 25°

Power supply:

• Voltage : 20 V
• Power: ? W

Dimensions:

• Space between LEDs: ~2.5 cm
• Space between LEDs and PCB : ~6 cm
• Average PDB size: 10 cm x 16 cm
• Max PCB size: 15 cm x 25 cm

Layout

8 x 10 = 80 LEDs per panel (total 160)
+-----------------------------------------+
| 0   0   0   0   0   0   0   0   0   0   |
|   0   0   0   0   0   0   0   0   0   0 |
| 0   0   0   0   0   0   0   0   0   0   |
|   0   0   0   0   0   0   0   0   0   0 |
| 0   0   0   0   0   0   0   0   0   0   |
|   0   0   0   0   0   0   0   0   0   0 |
| 0   0   0   0   0   0   0   0   0   0   |
|   0   0   0   0   0   0   0   0   0   0 |
+-----------------------------------------+

Interface

• ON/OFF switch
• LCD Display
• Buttons
• Buzzer

Participant

• User:Nemen
• User:Sasha