Update:
I have another heatsink design for this build. This is Igor's heatsink design that I will offer as a choice in this build kit. (leave it to Igor to improve my design) :gj:
I will offer both designs because some may be more comfortable with the one or the other building styles.
With style 1, you will be using fine wire to make the driver connections.
With style 2, you will be connecting your FlexDrive directly to the diode pins... (and not using the round circuit board in the build)
So now you have a choice of how you want to assemble this Key Chain CR2 build!
The advantages of the style 2 build, are this:
* Better contact from the heatsink to the host, because you will tighten the retaining ring against the heatsink. (more heatsink mass as well)
* Not having to de-solder the components off of the stock board. (but I would say more difficult to solder the driver directly to the pins)
Tips for style 2:
* Make sure the driver is fixed solid. Maybe with some glue to the module, as well as some hard foam or some other material on the sides to keep it from pushing side to side. It must be pressing against the module, not the pins. Make sure nothing is 'shorting' to the module or heatsink.
* Cut the tail spring shorter to lessen the pressure it would put against the driver...
* With style 2, there will just be enough room for a 'shorter' RCR2 rechargeable battery. (the 3.6/4.2 or the 3.7/4.2 ones will work)
The 3.0/3.6 ones are a little longer for some reason. I don't recommend those for style 2...
* You will solder a small contact point to the driver. Do this part, taking up as little room as possible. Perhaps by just a thin wire soldered through the FlexDrive positive input, and bent over the edge of the board. That is where your battery positive will make contact.
* The negative contact to the FlexDrive will come from the diode case pin. If it's a red build, then this will be automatic, since the diode case pin, is the diode negative, and will be connected to the driver. With a blu-ray build, you will simply solder the diode case pin to the diode negative pin, and then connect to the driver. This is fine for a FlexDrive, since both negative contact points on the FlexDrive are continuous...
Shortest Batteries:
Buy these ones:
RCR2 Unprotected Rechargeable Lithium Battery
They are the shortest I believe...
Lighthound ships really fast too!
I am offering both styles in case some are not comfortable with soldering directly to the diode pins.