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Great little MOSFET PWM controller.
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#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.
#12 (permalink)      8/9/2015 8:27:41 AM US Central   quote/reply + tips
NurseJ
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wuwei.ap wrote:

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.



Thank you for the reply! :)

#13 (permalink)      8/10/2015 12:43:15 PM US Central   quote/reply + tips
hexxed
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This got a lot of interest, I'll throw up a diagram shortly, short protection does seem to work, although theoretically it shouldn't, I accidentally tested it while checking voltage at the 510!

How do I deal with the LED indicator? I put it in a light coloured 3mm wall 3d printed box and it just about shines through, but subtly, I've never liked bright LEDs on mods!

I'm using a SUM110N04-2m1P which is one of the 'hardest' to drive MOSFETs around most likely, over 20000pF input capacitance IIRC, which means it needs less than 350mA pulse for a few nanoseconds then under 1mA to keep it 'open'. Used a 9k resistor to speed up the discharge as I don't have a clue as the to switching frequency output of the board.
#14 (permalink)      8/10/2015 1:01:38 PM US Central   quote/reply + tips
hexxed
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Diagram:


Note this is for single series only, so single battery and parallel packs.

To use it with a series mod you keep the board's and the MOSFET's positives separated, and take the positive supply for the board from the same battery you take it's negative connection from (the one directly connected to the MOSFET)
#15 (permalink)      8/10/2015 1:04:33 PM US Central   quote/reply + tips
hexxed
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The 5 click functionality is the same as the fire button, there's probably a way around it to separate them, but even at 90 watts, switching from off through the options to off again doesn't damage my wick.
#16 (permalink)      8/10/2015 11:06:27 PM US Central   quote/reply + tips
wuwei.ap
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Did you check out SKU 1402605?

It's a "special" eGo-T board with:

With LED indicator for battery voltage, click the button and the light will on: high--blue, medium--purple, low--red



It doesn't have the variable voltage to click through and has a basic voltage indicator instead for the battery. It sounds better than this board for what you are doing.

I am toying with the idea of optically piping the LED light with a strip of silicone, the box won't be transparent.

That's some spooky action if the short protection is functioning. :P


Edit: That diagram is definitely for a plastic case. ;)


Edited on 8/10/2015 at 11:18 PM. Reason:
#17 (permalink)      8/11/2015 9:46:49 AM US Central   quote/reply + tips
NurseJ
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wuwei.ap wrote:

diagram is definitely for a plastic case. ;)




I'm not good at electronics, my box mods always ends up looking like noodles...i'd have no idea how to make the wiring for this look remotely presentable for a transparent enclosure :D

#18 (permalink)      8/11/2015 9:49:37 AM US Central   quote/reply + tips
NurseJ
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Btw hexxed thanks for the diagram!!
#19 (permalink)      8/11/2015 9:55:15 AM US Central   quote/reply + tips
NurseJ
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@wuwei instead of a strip of silicone, wouldn't fibers from something like SKU 1537301 stuffed in heat shrink work better? XD
#20 (permalink)      8/11/2015 10:15:01 AM US Central   quote/reply + tips
wuwei.ap
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I'm a bit of a hack. I've made other things like a vibrato effects pedal and the back of one of my guitars is a mess, but if I keep sketching the diagram in different ways I can usually eliminate a wire or two.

This box mod is in planning for me, so you have that over me. :P

I need to get the box first for proper measurements because it's really small and I might not be able to fit it all in, it's down to millimetres. I want to use a wooden usb box. It's approx 80 x 50 x 25 mm and it needs to fit 2 x 14650.

This project will keep me busy for a while... :)

I hope to make some structural parts part of the circuit in keeping with the mech idea and reduce the number of components. I think a lot can be solved by design and I have a limit of what tools I can use. This could be the beginning of a really fun hobby.
#21 (permalink)      8/11/2015 10:20:26 AM US Central   quote/reply + tips
wuwei.ap
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NurseJ, that could work...

But I am cheap. :P

I figure I can use some silicone glue smeared into a 1mm thick sheet and cut to shape.

It's all the components, they add up in cost quickly, so if I can fabricate, I will.