What I've been up to... My Magnum mod

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eskimoroll

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ECF Veteran
Feb 1, 2009
202
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Minneapolis, MN
The casing is from a LED flashlight I picked up at Harbor Freight for $7.

I looked and looked for additional ones with that design, but I couldn't find any. It was just randomly lying on the bottom of the rack.

I just stopped by my local Harbor Freight and picked up that same flashlight for 3.99. They had a whole bunch of them sitting on the counter by the registers. Now I just need you to post some directions and I can start modding!
 

D_Struct

Super Member
ECF Veteran
Feb 9, 2009
792
3
Lufkin, TX
I just stopped by my local Harbor Freight and picked up that same flashlight for 3.99. They had a whole bunch of them sitting on the counter by the registers. Now I just need you to post some directions and I can start modding!


Awesome! I suppose I need to make my way to Harbor Freight again and see if I can find more!

I'll get something written up soon regarding the construction!

In addition: This is the link to the momentary switch I picked up at Radio Shack. This one worked great, and installed REALLY easy. http://www.radioshack.com/product/index.jsp?productId=2062496
 
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vslim

Full Member
Feb 19, 2009
49
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Houston TX
A couple of hints for soldering--always have a damp paper towel on hand--it serves many purposes--

Use it to wipe off extra solder from the tip
Use it to drip water to cool a just-soldered connection to cool it fast, or just touch a wet twist to the piece
Use it to cool your finger-thumb-hand after you have paid the Soldering Gods with the obligatory burn
After you finish the piece and are inspecting/fooling around with it, the paper towel will dry out and catch fire to remind you you forgot to unplug the iron. :evil:

Also-- put a strong broccoli-type rubber band around the grips of your needle nose pliers to make a gripping tool so you aren't chasing the piece around while trying to solder it.
Wait awhile to be sure the iron is totally hot before starting. Use skinny solder. Consider pre-tinning the piece and the wire to make the final joint faster. You are supposed to make a good mechanical connection before you solder the joint, but that isn't always possible. You may wish to make wires a bit longer and solder outside of your box rather than soldering in place, so you don't melt your box and can remove the circuit later in case you want to change it.
 

eskimoroll

Senior Member
ECF Veteran
Feb 1, 2009
202
0
Minneapolis, MN
A couple of hints for soldering--always have a damp paper towel on hand--it serves many purposes--

Use it to wipe off extra solder from the tip
Use it to drip water to cool a just-soldered connection to cool it fast, or just touch a wet twist to the piece
Use it to cool your finger-thumb-hand after you have paid the Soldering Gods with the obligatory burn
After you finish the piece and are inspecting/fooling around with it, the paper towel will dry out and catch fire to remind you you forgot to unplug the iron. :evil:

Also-- put a strong broccoli-type rubber band around the grips of your needle nose pliers to make a gripping tool so you aren't chasing the piece around while trying to solder it.
Wait awhile to be sure the iron is totally hot before starting. Use skinny solder. Consider pre-tinning the piece and the wire to make the final joint faster. You are supposed to make a good mechanical connection before you solder the joint, but that isn't always possible. You may wish to make wires a bit longer and solder outside of your box rather than soldering in place, so you don't melt your box and can remove the circuit later in case you want to change it.

Those are some great tips. Thanks! That rubber band on the pliers idea is particularly good. I was chasing pieces around my table all night. :mad:
 

D_Struct

Super Member
ECF Veteran
Feb 9, 2009
792
3
Lufkin, TX
Brief instructions for building a Detonator 3-piece LED flashlight mod:

Items you'll need:
3-piece led flashlight from Harbor Freight
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=95750

One Small chunck of 1/2" PVC Pipe - Schedule 40 is ideal (get a couple feet of it, so you can cut multiple pieces, if needed)

1 - 3A 125V SPST Pushbutton Momentary Switch from RadioShack
http://www.radioshack.com/product/index.jsp?productId=2062496

1 old phone cord (you'll need to strip it down to the individual wires inside the main cord)

1 piece of printed circuit board is ideal (you'll need this to mount your battery connection), but you can also use a simple 1/16" piece of plastic like I did.

1 connection from a dead 901 battery

2 - 3v CR2 800mah Rechargable Li-ion
http://www.dealextreme.com/details.dx/sku.932



First, break down the flashlight and remove the battery pack. You won't need it.

Remove the circuit board, silver spacer, and LED board from the front section. You'll have to unscrew the metal washer-type piece inside to remove everything.

Remove the rear button completely. Before installing your new switch, you'll want to cut down one of the two prongs on the back so that it will not make a connection with the battery. Only one of the prongs needs to touch the battery. The long one will be your positive, and the short one will be your negative. Then, take your replacement momentary switch and feed the button through the existing hole. Once it's flat with the rear of the case, put the lock washer and nut on the back side of the switch so it's held firmly in place. Solder a thin wire to the side of the shortened prong. This wire will go through the notch in the pvc, and, when the flashlight is assembled, it will rest between the pvc and the flashlight casing, creating the negative connection.

With a soldering gun, break the solder on the circuit board spring, as well as all the led connections. Make sure that you're being careful to not push the solder around on the circuit board. You want to make sure the solder points on the outer ring and the solder points inner ring of the board don't connect. This will ground the circuit out.

Once you've done that, you're able to solder the spring back in place on the circuit board. Use the small gauge solder. You don't want to make a mess.

Cut a piece of PVC so that it will extend from the back of the rear section (where the momentary switch is) to the metal spacer that will be above the circuit board. You can always adjust the length as you go. This will be the battery holder. It works great and holds them in place well. You might need to sand down the end of the PVC that will go inside the section with the switch. It's very tight. You'll also need to cut a notch on it that end so you can lead a wire from the connection you cut short on the momentary switch. This will be your negative connection.

Take your printed circuit board (or whatever you'll be mounting your connection to) and trace out the circle size you need. The best way to do that is to use the plastic lens that you removed to start. That'll provide the best fit. Place your 901 battery connector near the middle of the circuit board you just cut, and trace around it. Find a drill bit that is a shade smaller than that to do your drilling. This will provide that you get the snuggest fit. Once you're able to push the connector into the material, use JB Weld to secure it in place. Make sure you're not getting the JB Weld or liquid cement in or around the edges of the connection. These need to be clean so that you can later solder your connecting wires.

Take your telephone wires, feed one through the outer band of the circuit board, and solder it into place. Then, take your 2nd wire, and feed it through one of the inner band holes, and solder it in, as well. The wire in the inner band is your positive, and the outer band is your negative.

Cut those wires to an appropriate length, feed them through the holes in the silver spacer that came in the flashlight. Once you've done that, you will solder your negative wire to the outer ring of your battery connector, and the positive wire to the inner ring that surrounds the vent hole. You can see this process in madog's video very clearly.

Place the printed circuit board with your connector, the plastic spacer, and the circuit board into the flashlight. Place additional solder on the four outer ground spots on the circuit board, so that the outer ring of the board will be connecting to the flashlight casing. This completes the negative end of the circuit.

Once you've done this, you're read for the full assembly.

It's very hard to describe this entire process without pictures or video, but I hope I did a decent enough job. If you get stuck, or need any help, feel free to ask, and I'll do what I can to help.

More experienced builders: You're more than welcome to chime in with advice and guidance. I certainly don't know everything, and you might have much better advice than I do. It is most welcome!
 
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D_Struct

Super Member
ECF Veteran
Feb 9, 2009
792
3
Lufkin, TX
After a few days of using this, I've really got to say that this is the best thing since sliced bread.

I'm not applauding my mod, but the concept behind it. There are countless people here that do it FAR better than I do.

How awesome is it to be able to vape all day at work, go home, vape on and off all night, get up, go to work again and vape all day, still using the same batteries??

I never could've imagined how much this has changed my e-cig experience, but I'm truly loving it. No more fiddling with rotating batteries.

For everyone modding, keep building!
 
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