DIY Double Sided 60W LED UV Radiation Unit With Vacuum Pump

This is a description of how I designed and built my UV exposure box. After experimenting a bit with dry-laminate photo-resist and liquid UV hardened solder mask I decided to stop trying to improve my toner transfer technique and rather build a proper UV radiation unit for making printed circuit boards. I wanted it to be powerful and compact so I decided to use UV LEDs as the UV source. The preferred wavele ...

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