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Great little MOSFET PWM controller.
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#1 (permalink)      8/8/2015 10:32:50 AM US Central   quote/reply + tips
hexxed
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Great little MOSFET PWM controller.
Been using these to control N channel MOSFETs in self built mods, the output just goes to the Gate pin of the MOSFET, and to use a different button you just need to wire a switch between the negative and pin 3 of the IC. I have touched up some of the solder joints though as they ain't the best, but I assemble PCBs for a living so I'm a little picky about that!
The 5 click function means I no longer have to add a separate master switch and the low battery cutoff is nice to have too!
'Blue' is constant output, Purple is roughly 80% duty cycle and Red is about 60% duty cycle, I'm waiting on a friend with an oscope to get his and let me know the exact numbers.
They can be used in series mods too, but power for the board must be taken from the first battery only or it'll just autofire or fry the IC.
#2 (permalink)      8/9/2015 2:00:53 AM US Central   quote/reply + tips
wuwei.ap
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Wow, very clever!

You could also use an eGo T board much the same way, it will just give cut out at low voltage though. How are you managing the voltage indicator or is that a side effect of the arrangement?

What MOSFET are you using with this?

I found a NEC 2SK2498 for a single battery mini mod which I might put together with an imr 14650. Your controller solution is a great way to add protection to it.

Will it also sense a short (presumably yes!).


Edit:

Ego T SKU 1402605

Edited on 8/9/2015 at 2:05 AM. Reason:
#3 (permalink)      8/9/2015 2:58:28 AM US Central   quote/reply + tips
wuwei.ap
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Scratch the eGo T board, it has low and high resistance cutoff.

I just checked the X6 VV board, it fired as low as 0.20 ohms and as high as 4 ohms (+/-0.05). Those were the resistance of my leads and as fine as I could go with a 5K pot, respectively. :P

Edit: these figures are wrong, see next post.

Edited on 8/9/2015 at 4:05 AM. Reason:
#4 (permalink)      8/9/2015 3:20:17 AM US Central   quote/reply + tips
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Nymzavril
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I had no idea these fired so low, and had never even considered using anything so simple in line with a MOSFET. Good call hexxed - I might have to snag a couple to experiment with.
Grand Poobah of The Sacred Order of The Magick Blue Screwdriver. The old Juice Junkies FAQ and guides can be found here: https://www.dropbox.com/sh/vp4ktp8l7fdywg5/AABFkmnUJhjl9vX8tE4URZ8sa?dl=0
#5 (permalink)      8/9/2015 4:04:05 AM US Central   quote/reply + tips
wuwei.ap
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Sorry, I had to recheck. My above figures are wrong because I tripped the short protection and it wasn't delivering anything until I reset it (only the light fired), but I did manage to fire it at about ~1 ohms.

Too good to be true, sorry Nymz.

:P

Edited on 8/9/2015 at 4:07 AM. Reason:
#6 (permalink)      8/9/2015 4:16:15 AM US Central   quote/reply + tips
wuwei.ap
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And now I get 0.7 ohms.
#7 (permalink)      8/9/2015 4:59:55 AM US Central   quote/reply + tips
wuwei.ap
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Actually, the Atty resistance and short protection is not used if wired like this (- lead to battery -), I think.






It's only triggering the gate, no?

Edit: where S1 is the module.

Edited on 8/9/2015 at 5:02 AM. Reason:
#8 (permalink)      8/9/2015 5:51:54 AM US Central   quote/reply + tips
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Nymzavril
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I'll make it work, dammit!! Lol.

For a quid, I'll pick one up and put it in the 'to tinker with when really bored' pile.
Grand Poobah of The Sacred Order of The Magick Blue Screwdriver. The old Juice Junkies FAQ and guides can be found here: https://www.dropbox.com/sh/vp4ktp8l7fdywg5/AABFkmnUJhjl9vX8tE4URZ8sa?dl=0
#9 (permalink)      8/9/2015 6:53:39 AM US Central   quote/reply + tips
wuwei.ap
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I have an ego t pcb in the cart now. It has a led v level indicator. I'm on a mission now with a MOSFET. :)

I found these wooden boxes for USB sticks that might make the perfect mini mod. They even have a magnet to hold the lid like some of the wooden mods here. For a few bucks more I can have a logo printed on them. They're promo goods. xD
#10 (permalink)      8/9/2015 7:08:00 AM US Central   quote/reply + tips
NurseJ
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hexxed wrote:

Been using these to control N channel MOSFETs in self built mods, the output just goes to the Gate pin of the MOSFET, and to use a different button you just need to wire a switch between the negative and pin 3 of the IC. I have touched up some of the solder joints though as they ain't the best, but I assemble PCBs for a living so I'm a little picky about that!The 5 click function means I no longer have to add a separate master switch and the low battery cutoff is nice to have too!'Blue' is constant output, Purple is roughly 80% duty cycle and Red is about 60% duty cycle, I'm waiting on a friend with an oscope to get his and let me know the exact numbers.They can be used in series mods too, but power for the board must be taken from the first battery only or it'll just autofire or fry the IC.



Brilliant!!!

Does the 5 click function work with the separate button? How many amps is the separate button pulling?

#11 (permalink)      8/9/2015 7:37:56 AM US Central   quote/reply + tips
wuwei.ap
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Yes, the separate button would perform the 5 click on/off.

It only passes as much current as the control section of the circuit (not a lot). You could substitute nearly any low amp rated switch. It might be as little as 20mA.