LPF Site Supporter
- Oct 14, 2012
THE "DEFIANT" PEN, FROM LED TO LD
This transformation started out while wandering through the local Home Depot store. I spotted a 2pk. of "Defiant" pen lightsfor $4.88.
Well, for $2.44 each, and with a name like Defiant, these babies were just begging to be modified, and so it began.
There have been quite a few very nice pen builds lately, and most all are super powerful burners that will singe the hair off a cats a$$ at 30 feet.
This one is a little more laid back, using one of my favorite little diodes, the opnext 638nm 120mW single mode.
Here are the components used in this project:
- "Defiant" pen light from Home Depot.
- Custom aluminum sleeve/heatsink.
- 2 - 10440 Li-Ion batteries.
- Survival Lasers extended, black anodized aluminum focus adapter.
- Opnext/Oclaro 120mW diode in copper module w/driver (set at 300mA) & G2 lens from DTR.
- Arctic alumina thermal adhesive.
The first step was to completely disassemble the pen, including the tailcap switch, in preparation for bead blasting.
After disassembly, I found that the bore was slightly too large in diameter for a 12mm module, and also too short to fit the module/driver assembly, while maintaining the two battery configuration.
So, what I did was to make an aluminum sleeve/extension piece to fit my altered penlight crown.
Before and after pics of the business end of the pen.
To obtain the clearance that I needed for assembly, I also had to remove the rear of the 12mm module, this gave me enough room between the driver and battery contact board to make the electrical connections.
The LED driver board was stripped of components and re used as the battery contact board. I applied a dab of solder for a better connection.
this pen came with a little threaded ring to help retain the contact board.
All assembled for the 1st time. As I previousely mentioned, the host was stripped of its black anodizing by bead blasting, and then was sprayed with a matte, clear laquer finish for protection.
I retained the black tailcap switch, pocket clip, and added a nice Survival Lasers black anodized extended length focus adapter for some contrast with the natural silver finish of the bare aluminum.
Here is the original "Defiant" LED pen along side of the finished laser pen.
Indoor beamshot in the barn.
Clamped in the tripod, sitting in the snow.
Beam shot and dot on the barn wall in late afternoon on a snowy day. If you look hard, you can just see a faint beam.
Again, thanks to DTR for the excellent diode/driver combo., and also to Gary at Survival Lasers for the sweet focus adapter.
That's all for now folks, thank you for looking!