EverCool Variable Voltage Mod
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The chip makers seem to be a lot more expeditious with samples. Those I often receive in a few days. I've ordered tantalum SMD samples from Kemet several times and they also take a while to show up. I actually like Kemet tantalum products better. They seem to be a little cheaper when you need to buy them. I also use their SMD MLCCs a lot, but they're actually more expensive. I like the Kemet ones because they only use the higher grade dielectrics which improves temperature tolerance and efficiency.
I've been building this evercool circuit since BigBlue started this thread.....I used the caps on the first one I built, have built about 10 of them since WITHOUT the caps, and have had ZERO problems whatsoever. So yes, you CAN do it and it DOES work just like it should.
Heres that same 18650 box from eBay, a guy over at VF built these with the EVERCOOL circuit in them.
Heres that same 18650 box from eBay, a guy over at VF built these with the EVERCOOL circuit in them.
those look familiar... hmm...
I think I've seen them somewhere before.
wait... OMG that looks exactly like mine!
I think I've seen them somewhere before.
wait... OMG that looks exactly like mine!
those look familiar... hmm...
I think I've seen them somewhere before.
wait... OMG that looks exactly like mine!
yeah because they are sweet mods... I am thinking of making one too
ok, i'm checking the datasheet, and I'm a bit confused with ESR, would it affect this mod? sorry, I might be going OT
those look familiar... hmm...
I think I've seen them somewhere before.
wait... OMG that looks exactly like mine!
pics?.......
Here is a better layout:
just another question, how would you wire a Li-Po Voltmeter in this diagram? planning to make one with a voltmeter...
Parallel the Positive wire going to the atty to positive of voltmeter and parallel the ground wire going to the atty to ground of voltmeter
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You would pull off the 4th pin for a output voltage reading. You can tap into a ground where ever you want.
thanks for the prompt response, retird and java_az.... as for the capacitor issue, will the ESR rating have any effect?
I have built the evercool with aluminum elect....caps and tant....caps and both work great.....tant....caps are smaller....
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ok, so the ESR is negligilible... hope my request for samples push through
wish me luck
Just using shorthand and elect.....is for Aluminum electrolytic capacitors.
Exactly retird,
Tantalum is an Electrolytic capacitor. (Wikipedia)
There are two types of electrolytics; aluminum and tantalum.
The tantalum capacitor is a highly reliable type of solid capacitor or electrolytic capacitor. Surface mount tantalum capacitors are increasingly being used in circuit designs because of their volumetric efficiency, basic reliability and process compatibility.
Tantalum is an Electrolytic capacitor. (Wikipedia)
There are two types of electrolytics; aluminum and tantalum.
The tantalum capacitor is a highly reliable type of solid capacitor or electrolytic capacitor. Surface mount tantalum capacitors are increasingly being used in circuit designs because of their volumetric efficiency, basic reliability and process compatibility.
Good Luck.....ok, so the ESR is negligilible... hope my request for samples push through
makin some changes first... hehe... I'll up the pick in a day or 2 after its done
My sample should be here friday, as well as my caps and other small parts.... cant wait to give this a try... thinking of using plug in connectors for the batteries, so i can switch the board between 14500's and 18650's in two seperate boxes....
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