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...until I realized how small so many of the components were.
They're saying they'll have to move to quantum logic to reduce things any further. Quantum logic being the state of individual atoms.
Do you have like a soldering iron with a "tiny" tip?
BTW...How much would you charge for your 18650-D mod?
I don't actually build these mods to sell them. I build them for myself and I've given a few to friends, that's about it. Problem is it takes me too damn long to build one since it's all assembled by hand. It's not really worth my time at any reasonable price. To take orders, I would have to have them mass produced on a line and it's a pretty big deal to do something like that, mostly a matter of money, but also logistics.
Below is the bottom view of the board I use in my mods. You can see the smallest stuff I'm soldering by hand now is chips with .5mm pin pitches and 0603 SMD components. Those are 1.5mm x 0.8mm. I have to use a 10x stereo microscope to solder that stuff. If they reduce the size of packages smaller than that, I won't be able to build stuff by hand anymore.
It's all yours, bro. I gave up on that little thing. I think I'll go the Evercool route, and stick to circuit boards and larger enclosures for now.
Well, I wired it all up according to the diagram, but no matter how much I turned the trimmer, I was getting a constant 3.9 our of a 14500 Flames. Not sure where I went wrong, but it was very frustrating.
Dave, I have no doubt you are right. I have a crappy soldering iron, a crappy helping hands, and this is my first time soldering anything this tiny. The messiness was a main reason I didn't post pics sooner. But I figured, "What the hell, everyone started somewhere, right?" Could the cold joints be the problem?
It's hard to tell from those pictures but It looks like you have all the pins of the pot hooked up.... Not sure it's supposed to be that way. try disconnecting pin 3 on the pot and see if that works.
It's okay to use all three pins. Either diagram will work the same. By using two pins tied together: If the potentiometer fails for some reason (age, poor quality, dirty, etc.)? If the wiper (which is the rotating part of the component and probably most prone to failure) shorts out, it will let the full amount of signal through. By attaching lug 1 to lug 2, we are building in a “fail-safe.” This ensures that the circuit is never completely open—there will always be some resistive path in case the wiper goes south.
Before getting into the possibility of a cold solder connection, have you used that type of pot before? What value resistors and pot did you use?
In Phestr's reply # 20 it looks like pins 3 & 2 are connected... Would it be safe to say that pin 1 is cc rotation, pin 3 cw rotation and pin 2 the wiper? So you can connect one of the other pins to the wiper pin? Guess I'm confused.
I didn't know about being able to do that... Cool. In Phestr's reply # 20 it looks like pins 3 & 2 are connected... Would it be safe to say that pin 1 is cc rotation, pin 3 cw rotation and pin 2 the wiper? So you can connect one of the other pins to the wiper pin? Guess I'm confused.
I agree w/ breaktru about the multi-turn pots. I had a 21 turn pot and is a pain to adjust. It took many turns to see any output difference. Never again. I only use single turns now.
I've never used a pot before, but it is a multiturn 100k. The resistors are 15k between pin 3 and 4, and a 4.7k between the pot and pin 3. If this is true...it is entirely possible that I have been turning it the wrong way.
Pin 2 or center pin is always the wiper. Incrementing resistance causes lower output voltage and visa-verse. So what I do is put an ohm meter on my pins and turn the pot knob clock-wise to make sure the resistance is decrementing. If not, I reverse the pins.Most trimmer pots don't have pin numbers. 2 outside legs and 1 center.
I know this is a guess on my part but I was going by the diagram on this page. http://www.bourns.com/pdfs/3296.pdf The pot that he's showing in his pictures looks similar... I'm assuming this diagram is pretty close to what he's using. I could be totally wrong though. I don't remember Phestr posting detailed information on the pot he was using, he may have and I just missed it.
The numbers for the legs are inscribed on the pot itself. I just got a 1S-6S that I'm going to wire tonight into a module. As soon as that is done, I'll hook this thing up and try again. Thanx for all the info, guys. I'm gonna feel super stoopid if I was just turning it the wrong way, but at least it's a simple thing and I did the work right. Here's the trimmer I used: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300938323432. It looks like it's a knockoff of this: http://www.bourns.com/pdfs/3296.pdf. 25 turns...man, that's alot. But for trial and error work, I didn't want to break the bank.
