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Finding someone that stocks those resistors in a through hole configuration is proving to be challenge, Digikey, mouser are pretty much a no go, all I'm finding from them is SMD's
Put together the parts list for future reference digikey has everything in stock..97 cents to build the 7.4v circuit..http://www.digikey.com/product-search/en?WT.z_header=search_go&lang=en&site=us&keywords=TL431BCLPGOS&x=18&y=10&formaction=onhttp://www.digikey.com/product-detail/en/MFR-25FBF52-10K/10.0KXBK-ND/13219http://www.digikey.com/product-detail/en/RNMF14FTC2K20/S2.2KCACT-ND/2617481http://www.digikey.com/product-detail/en/1622461-1/A105959CT-ND/3477538http://www.digikey.com/product-detail/en/1622500-1/A105962CT-ND/3477542
I owe you a beer or a six pack for that matter as I would have had to order from different places, If your in NH drop me a PM.
Hope you have a sister who's a cheerleader or supermodel, hot geek will do nicely as well
No hot supermodel cheerleader sisters but if you piss me off I can introduce you to my ex-wife.
I was looking for 1/8W which were near impossible to find anywhere.
Im really not very choosey, are we talking one or two bags here. : jkHows that circuit coming along..
You must have been looking in the wrong place;http://www.mouser.com/Passive-Components/Resistors/Film-Resistors/Metal-Film-Resistors-Through-Hole/_/N-7gz41Zscv7?P=1yzaok0Z1z0wljo
I've been working with this and my setup must be funky as I can't get it to work with one red LED and the 10K (the LED is lit above my 6.3v cutoff, although dimmer at higher voltage), but it does work when using 2 red LEDs (LEDs off >6.3v and clear on <6.4v) like this...I'm using the LM431 and red flashing LEDs so maybe that's the reason.Maybe I'll just tuck one LED behind the scenes.
So as usual I've learned some very useful info here which got me taking a second look at things. I'm going to run the Panasonic NCR18650PD High drain 2900mAh 10A in my PTR08100 build. What I learned tonight is they have a max discharge of 2.5V I'd like to tweak the low batt indicator to say 2.7V is that a matter of changing one resistor up or down, which one, or is it more involved then that. I could sort it out myself w/ a little direction on where to start.
Going off of Kortts diagram and comparing it to Breaktru's schematic is this correct for a dual battery setup?The 15K will be replaced by the 10K240 willbe replaced by the 2.2Kthe 4.7K will stay the sameand the 22K will be replaced by the 3.3KHere is a pic using Kortts diagram. http://i1262.photobucket.com/albums/ii617/blkbd/kortt-LVI-2cell_zps9803df59.jpg
Can someone confirm the diagram is correct for a dual batteries?
Yes, that would work for two series batteries with an indication at 6.0V
Running the battery down to near max discharge can't be good. You will be safe at 3v. What will you gain by running down to 2.7v? A few more puffs?
When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by:which is approximately equal to . (1+r2/r3)
I found it!That's what i was looking for...Do you think this will work???
now i am no expert....so maybe someone can work out if other parts are stressed or not....or what the total power consumption would be....but i feel sure it can also be tied to the fire button to just display when your using the mod....
The draw on that ciruit is always at least as much as the LEDs so you definitely would not want the circuit powered other than when the trigger button is pushed.
I always use an on/off switch at the battery
SilenTDoGzJr. Memberhi Pako....i was looking at your circuit diag and wondering why it didnt work.....so decided to try it myself ! .....didnt work for ME either...so i played about with the 2 resisters and finally got thisnow...granted, i only had a BC547B available so i dont know if that was the difference....but now i get....4.2V fresh battery = Strong green light3.4V =Still Green but dimmer3.3V =Green AND RED3.2V =Red light dim (ish) but gets stronger as you drop to 3vnow i am no expert....so maybe someone can work out if other parts are stressed or not....or what the total power consumption would be....but i feel sure it can also be tied to the fire button to just display when your using the mod....