I’ve even made my first board. PCB with photoresist already spun onto it is available somewhere on the internet, but my roommate just happened to have some and the chemicals for etching it. Anyhow, I took a stab at drawing it all up in Eagle, then I printed the traces and pads onto transparency film and taped that over the PCB and exposed it under UV light. From there, it’s just like old fashion black and white photography. Dip it in this, then that, then rinse and voila, you’ve got a PCB. I’m obviously not making the best use of the space on the PCB, but it was a first attempt and it actually worked. This picture of it is after I moved, and the inductor for the buck/boost is missing.
- Luxeon LED
- Maxim Li-ion IC: MAX1555EZK+T
- National Semiconductor LED drive IC: LM3410XMF/NOPB
- Various resistors, capacitors, and inductors
- Mini-USB plug
- Li-ion batteryCollimator lens
I recommend checking out www.maxim-ic.com (not maxim.com as I learned the hard way) before you start your project because they have free samples of various IC’s available.