Comments on: Soft start your flashlight for longer bulb life

By: Solenoidclock

Solenoidclock — Fri, 06 Jun 2008 08:05:21 +0000

The photo effect! :0

It's just not the same hackaday without.

By: japroach

japroach — Fri, 06 Jun 2008 06:39:28 +0000

NTC would work, you can get one that will go from say 14 ohms down to 0.1 ohm, with a max current rating of 5A.

The two downsides are: the 0.1 ohm on resistance is more power loss compared to the 0.04 ohm of his mosfet (although the rest of his circuit will take some power).

and that if you switch it off, then on quickly, the inrush limit effect is weakened, as the thing is still hot.

By: aaron

aaron — Thu, 05 Jun 2008 21:27:18 +0000

there’s your photo effect to those of you who’ve taken notice when it’s not there :P

By: Rad

Rad — Thu, 05 Jun 2008 21:19:36 +0000

I doubt this would make a diffrence with leds, so too bad I bought 200 10,000mcd diodes...

Either way, hackaday hasn't been living up to its name, I keep seeing more than one hack posted occasionally.

And I couldn't be happier.

By: Boris Gjenero

Boris Gjenero — Thu, 05 Jun 2008 21:12:20 +0000

One could probably just use an NTC (negative temperature coefficient) thermistor. Some are actually sold as inrush current limiters.

By: tekunogekai

tekunogekai — Thu, 05 Jun 2008 15:33:34 +0000

What a bright idea.

By: rm -rf zoink

rm -rf *zoink* — Thu, 05 Jun 2008 15:25:26 +0000

yes, zoinks, there's a flippin' schematic. happy now?