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Did you know that we can create a homebrew PCB exposure box using an old printer scanner? Yes you read it right!
The Problem:
In my experience, the quality of the presensitized method for making homebrew PCBs is really impressive, especially when you are dealing with tiny traces. Now, the presensitized method needs to be exposed to UV light for a certain amount of time; that means it won’t etch well if it gets overexposed or underexposed.
Ever since, I’ve been using my fluorescent lamp to expose the PCBs, but we are going to change that starting today!

Here are the things that you will need, you’ll need a 12 volt power supply, two 10k potentiometers, an i2c 16x2 LCD, a resistors, a buzzer, an Arduino nano, a TIP 31C transistor, a UV LED strip, a momentary switch, a female DC power jack, a header pin, and lastly, the star of the show, which is the old printer.

- 12 volt power supply
- Two 10k potentiometers
- i2c 16x2 LCD
- Resistors
- 100 ohms (1x)
- 10k ohms (1x)
- 470 ohms (1x)
- Buzzer
- Arduino Nano
- TIP 31C transistor
- UV LED strip
- Momentary switch
- Female DC power jack
- Header pin
- Old printer

Tools Required:
- Soldering Iron
- Soldering Lead
- Tweezers
- Desoldering Pump
- Solder Paste
- Wire Cutter
- Cable Tie
- Grinder (optional)
- Hacksaw
- Acetone”

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