July 2014 – Wai's Site

Blast from the past hardware: ZIP Drive

July 24, 2014March 20, 2016 waicool20 Leave a comment

This is a series of personal thoughts about the old hardware that we have in our hands.

One day my professor gave me this old box ( He was cleaning up his office since he was about to leave :c ) and inside it was some ancient hardware, maybe most of you recognize Hard Drives and DVD Drives, some of the more luckier ones the Floppy Drive, but I have something even less common —– the ZIP Drive. Yes it maybe more new tech than the Floppy Drive but it is still pretty old and more rare than it. Read More

Tesla Coil completed but having problems….

July 22, 2014March 20, 2016 waicool20 4 Comments

Yes I have completed the wiring took me a long time but I have finally done it. Sadly the coil isn’t working , it keeps on burning up the fuses. I will keep on investigating why this isn’t working. But here’s a photo first!

Making of the DRSSTC H-Bridge: Part 3

July 14, 2014March 20, 2016 waicool20 Leave a comment

The final part of the series. the H-Bridge is etched and populated with parts. There’s nothing to say much about this so I guess here are some photos:

Making of the DRSSTC H-Bridge: Part 2

July 8, 2014March 20, 2016 waicool20 2 Comments

We are back with some PCB making! Last time we were prepping the board so I will be exposing the board this time.

Exposing

So I had my H-Bridge design printed out on transparencies using the highest DPI settings. I used a inkjet printer to do this, actually it does not really matter what kind of printer you use, just make sure it doesn’t leave small holes in your artwork.

PCB UV exposure time calibration board

July 4, 2014March 20, 2016 waicool20 1 Comment

Usually getting the right exposure time for you PCBs(Printed Circuit Boards) is really hard, and I had a board fail on me recently because I switched my transparent medium( The thing I use to press the transparencies onto the blank PCB ) from a glass plate to acrylic sheets. Before, I found my exposure time just right ranging from 9-14 mins, but after using the same exposure time on acrylic sheet mediums the board came out as a disaster because the photo resist didn’t hold. Here is a picture of the failure: