On the other hand, this was a great introduction to switch-mode power supply designs, and what not to do with our own builds. Continue reading “Just How Dodgy Are Cheap USB Chargers Anyway?” ...

Unfortunately [ian] has a 3G firewire iPod so he decided to build a switch mode power supply to generate the 8-30V required by firewire. The device is powered by 3 AA batteries and uses a PIC ...

This single-chip, highly integrated active-clamp current-mode PWM controller solution is designed for isolated power supply and Power ... and 30W–200W Switch-Mode Power Supplies.