Dilshan R Jayakody’s Web Log posts building a DIY UV exposure unit:
UV exposure unit is a vital component in printing and mass-manufacturing industries. I decided to build a UV exposure unit to assist my screen-printing and PCB prototyping needs. After examining the market, I decided to construct this unit using black fluorescent tubes. Those black fluorescent tubes are usually available to purchase in many electrical shops here in Sri Lanka.
To drive the exposure unit, I build an electronic controller using ATtiny2313A MCU. This controller is capable to handle the exposure unit for up to 999 seconds (approximately 16 minutes). This electronic controller got two high-power relay driver stages, an audible notification unit, a safety lock, and a programmable timer.
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