PCB Exposure using UV light LED box - Do It Easy With ScienceProg

I came across this interesting project. The guy decided to make a UV PCB exposure box made of UV light LEDs. The main reason why he used LED was the power dissipation and compactness. Assuming that one UV tube would take about 6W while one UV LED would take about (20mAx3.2V=64mW). Most of that energy UV tubes dissipate as heat energy. So he took: 54 x UV LEDs of 400nm (6000 – 7000 mcd) – 100 units in costed 12€;18 x 68ohms resistors 1/4W – 0,36 €;1 connector – 0.50€;1 electrolytic condenser of 2200uF – 30v;1 Eurocard Plate 100×160 about 5 € ; A 12V power supply powers the plate of LEDs. LEDs’ radiation angle is 20º, so they took about 8cm heigh box that light could cover the whole PCB area when distances between LEDs are 18mm. Download circuit and PCB from original site. Continue reading

DIY Portable UV Exposure Box (PCB Making Gadget) - Instructables

UV LED PCB Exposure Box

DIY UV PCB Exposure Box ()

DIY Portable UV Exposure Box (PCB Making Gadget) - Instructables

LED UV exposure box part 1, the box

UV LED Exposure Box For Printed Circuit Boards Etching

Make a UV PCB Exposure Box Using an Old Scanner

EP11 – DIY PCB – Making a UV Light Box Enclosure

UV LED PCB Exposure Box

UV LED PCB Exposure Box

UV Two-sided Exposure Box : 5 Steps (with Pictures) - Instructables

DIY UV PCB Exposure Box ()