Tag Archives: AVR…

DIY UV-LED PCB exposure box in a scanner

This is my home made PCB UV-LED exposure box housed in an old scanner. The countdown timer is custom made using ATtiny2313 uController. The display unit is a 4 digit 7 segment display module. The firmware was written in CodeVisionAVR C compiller and the LEDs used for this project are 5mm high brightness (2000 mcds) […]

PCB Exposure Box with UV fluorescent lamps

This is my new big (A4+) PCB exposure box made with MDF. I used fluorescent UV lamps from Sylvania type T8 BL350. Exposure time is 5 minutes from a distance of 6 cm from the lamps with excellent results. Now I can achieve minimum clearance between tracks and minimum track width down to 7mils (0.18mm). […]

IMPRIMINDO PCI CESAR CORTESE

Imprimindo PCI direto sobre a placa com impressora jato de tinta. Detalhes das alterações feitas no link https://flic.kr/s/aHsjBJ1ZqU A impressora é uma Epson T25 e a tinta é a original “Durabright”. Não serve outra pois esta tem pigmentação com algum polímero no meio, o que a faz ficar impermeável. As alterações não são muito criticas, […]