Transformerless power supplies are showing up a lot here on Hackaday ... encounter one someday because they’re in everything from LED lightbulbs to IoT WiFi switches. We’re going to look ...
There are other LED drivers that are compact... Offering 70W in an ultra compact encapsulated package, the STRATO 70W constant voltage power supplies offer wide range input and 12,24 and 48V outputs ...
and that’s exactly what [Trammell Hudson] has done with his resource page for hacking the IKEA TRÅDFRI LED power supply with wireless interface. Schematic teardown, custom firmware images ...