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.
8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.