This is my first attempted to design and build a practical simple boost converter, built in last night.
Input : USB power rail 5V
output : 9V @ 2mA
easy but every effective, it could be used for my Arduino project and help to transforms 網樂通 (an obsolete IPTV, set top box for free) to become a fax relaying server.
Yes, it is 100% handmade and discrete component build, no any IC is used, no need of etching PCB, only handy tools and single side copper clad board. The distinction of this handmade, quick & easy, plenty of GROUND can be used everywhere within board area. In compare with those pre-drilled PCBs of which is used for hobbyist or prototyping, this DIY approach offers inevitable advantages.
How it looks like and how to used that ? It acts as a functional block with 3 terminals, +5V input, Ground, 9V output.