calipsoii
Flashlight Enthusiast
- Joined
- Apr 21, 2010
- Messages
- 1,412
Can you tell me what kind of LEDs you ordered, brand, part #, etc.
Digikey part numbers
754-1130-1-ND
754-1133-1-ND
754-1437-1-ND
754-1438-1-ND
Can you tell me what kind of LEDs you ordered, brand, part #, etc.
oo:
Wow, that's pretty crazy. Definitely going to give that circuit a try when I get a chance. ...
You've inspired me. I just got in:
516-1396-ND
516-1397-ND
Both of these have a Vf low enough to not need any circuitry when run off of a 1.5V watch watch battery (379). I need to make myself some new test leads for my Fluke, however as the current is so low, the resistance in my old leads is throwing my readings off. Still as bright or brighter than the tritium vials I have, however.
-DF
great idea! I made one on Sunday (after reading this thread), just a red smd led connected directly to a LR44 (1.5V) button cell battery. it glows! let's see, how long it lasts.
I want to try this flasher: http://www.discovercircuits.com/DJ-Circuits/OSC4.htm (the one on the right)
It's a bit tricky, but pretty simple: just sand the place, where you want to solder and use some soldering paste. I recommend to use 100W soldering iron, because you want it to be able to heat up the entire battery quickly. also, use a vice to hold the battery while soldering, this makes things a lot easier.Looks awesome! Did you find it difficult soldering directly to the battery? I've never tried out of fear of overheating it and having it blow up in my face. The few times I've tried to solder leads to rare-earth magnets has been traumatizing enough...
That's it for pictures right now. I'm currently working out a graceful way to remove the batteries. It's possible right now, but it's somewhat... violent.
More to come!
I used 100k ohm resistors for both. At first I couldn't even tell if the LED was lit, but it's more than enough light at night.