I'm new to this forum and glad to be here! I'm building a 1 watt led circuit (planning to...) most of the circuits I found online, make a lot of heat and I wish I could find a better one to get bright and power friendly flashlight for my "power bank".
Recently, I've built a 555 based LED driver which is super efficient and bright enough for smd leds it is actually blinking at high frequency so you won't see by naked eye, it is so beautiful. Anyway the problem is that it cannot drive 1 watt leds so I'm wondering if I could do something about it, I bought lm317 for 5.1 to 3.3 volt conversion but I’m pretty sure lm317 is not the best idea (cause of voltage conversion and wasted power by heat) Can I mix ne555 and lm317 or even a transistor? So again it blink at high frequency I mean using pin 3 of 555ic as trigger for the transistor or lm317 to bright the 1 watt led Vcc=5.1volt @2amps