Joule Thief

[4Tesla]

I was looking at boost converters and found this one.. very low running voltage of .3v and starting voltage of .5v

TPS61200

http://www.ti.com/lit/ds/symlink/tps61200.pdf
http://www.newark.com/texas-instruments/tps61200drcr/dc-dc-converter-boost-600ma-son/dp/86W6331?mckv=s0DVoR7Rl
http://www.karlssonrobotics.com/cart/lipower-boost-converter/?gclid=CKrY0Ojq-L8CFQuCaQodWUcAWQ

[Pirate88179]

I was looking at boost converters and found this one.. very low running voltage of .3v and starting voltage of .5v

TPS61200

http://www.ti.com/lit/ds/symlink/tps61200.pdf
http://www.newark.com/texas-instruments/tps61200drcr/dc-dc-converter-boost-600ma-son/dp/86W6331?mckv=s0DVoR7Rl
http://www.karlssonrobotics.com/cart/lipower-boost-converter/?gclid=CKrY0Ojq-L8CFQuCaQodWUcAWQ

Nice find.  The ND1402's I am using start at .8 volts and run down to .3.  This is an improvement in my opinion but, yet another package that is near impossible to solder for guys like me.  I am still working on a workaround.  I read the link that TK provided for reflowing and I spoke to the electronics guys at work.  I showed them a chip and they just shook their heads.

Hackaday had a post a while back on converting a toaster oven to a reflow oven.  I might have to look that one up.

Bill

[4Tesla]

Nice find.  The ND1402's I am using start at .8 volts and run down to .3.  This is an improvement in my opinion but, yet another package that is near impossible to solder for guys like me.  I am still working on a workaround.  I read the link that TK provided for reflowing and I spoke to the electronics guys at work.  I showed them a chip and they just shook their heads.

Hackaday had a post a while back on converting a toaster oven to a reflow oven.  I might have to look that one up.

Bill

Yep that is the problem with SMT.  I may mod this board and try various JT circuits with it.

http://www.karlssonrobotics.com/cart/lipower-boost-converter/?gclid=CKrY0Ojq-L8CFQuCaQodWUcAWQ

Edit:

I found more that might be something to look into..
http://cds.linear.com/docs/en/datasheet/3105fa.pdf

These two require step up transformers..
http://cds.linear.com/docs/en/datasheet/31081fb.pdf
http://cds.linear.com/docs/en/datasheet/3109fb.pdf

[TinselKoala]

You could probably do it with a clothes iron and solder paste.  Dab the paste onto the circuit board pads and set the SMD onto the paste. It should hold it in position. Then set the board down on the upturned iron until the solder paste melts.

Or you could make a hot air gun out of some metal scraps and a blow-dryer.

The chipquick stuff works well to keep several or even many pins of solder fluid long enough to position items during assembly. A temperature-controlled iron with a fine tip and a good magnifier are necessary.

I recently used the chipquick to remove and replace a single NeoPixel from an Adafruit NeoPixelRing assembly.  The NeoPixel is a six-pad square thing 0.2 inch per side.

[Lakes]

Tk is like the McGyver of the electronics world - Next up, how to make a laser out an old ruby and some polished tin plate.