.:madworm:.'s photos with the keyword: boost converter

Step-up converter with LT1618

Step-up converter with LT1618

.:madworm:.
17 Dec 2009 91
The current sensing resistor is still missing as I couldn't find 0.22Ω anywhere, but the chip also has adjustable output voltage support. I just measured the LED current and adjusted the voltage. That's not the right way, but this was an "emergency build" ;-) Edit: The [expletive deleted] chip is dead !
Step-up converter with LT1618

Step-up converter with LT1618

.:madworm:.
17 Dec 2009 95
The current sensing resistor is still missing as I couldn't find 0.22Ω anywhere, but the chip also has adjustable output voltage support. I just measured the LED current and adjusted the voltage. That's not the right way, but this was an "emergency build" ;-) Edit: The [expletive deleted] chip is dead !
Boost converter

Boost converter

.:madworm:.
28 Feb 2012 95
This one is quite good. Doubling from 2V to 4V still gives several hundred mA of juice. Nice. And the little chip didn't even get warm.