Modder's Printed Circuit Board

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mogur

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Apr 24, 2009
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The following illustrations demonstrate where the original ecig design came from and where it basically is today-

electronics.png

 
Lik Hon had originally loaded down the device with a liquid pump, lcd screen, piezo atomization vibrator, air flow sensor, capacitive lip sensor, and who knows what else. Now we have a simple heater jammed into polyfill with a microphone for activator. But it's not too late to capture some of the original glory (or go beyond). Here are the specs on the above microchip:

PIC10F206-
512 word flash memory
24 bytes ram
4 I/O
1 8 bit timer
1 comparator
wake-up from sleep on pin change
weak pull-ups on I/O pins
SOT-23-6 package (among others)

Let's say we build a modder's pcb with an intelligent controller on board. Then we have the luxury of getting as simple or as fancy as we choose.

boardoutline.png
 
 
The board measures 1.5" x .6" as it now stands. It would fit neatly (and painlessly) into a double AA box mod with a 14500 cell, with only four wires to solder in. Add a micro terminal strip and you wouldn't even need to solder the wires. I can flash program the chip, and solder up the components on the PCB.
 
aabox.png

 
If you want to get glorious, we could add battery level indicators, morse code LED flashing, a custom heating coil profile, a feedback circuit for fine tuning the coil output, sensors for coil brightness, etc. But to blow this thing out of the water, since we are already connected to a USB port for charging the battery, someone with USB HID protocol experience could program a little visual basic program that would allow total ecig control from your computer screen. You could tell the mod board what you wanted for coil output, and the board could upload useage data, battery level, etc. Oh yeah, the tactile switch would no longer be carrying the full amperage of the heater, just a milliamp signal to the micro.

At this stage, it is just a concept. The actual parts depends on input from anyone that is interested. The final PCB should at least be double-sided, solder-masked and silk-screened. These boards I had done off-shore for about $8 a set in 100 quantity, as a hobbyist from my home. Someone with electronic manufacturing company access could probably do better price wise, as a loyal boardhouse customer. Maybe $4 a shot for these tiny boards, the PIC is under a dollar, and a fancy PIC with USB and A/D built in for less than 3 bucks.

img5259v.jpg
 

boxhead

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this is what i want. i like the mini-usb, i have parts and a mini-usb is is the first part i got so i could vape on the usb port of a black & decker porta power, charge the battery, and then unplug and go away. having pcb with led, charge, mini-usb in, pic controler would be way cool.

i be the first to i want one or fourteen, arg...i only got 4 and 4 of the connectors from nerf...that is what im waiting for for my second mod, the first is a 201 atty wired to a old wall charger and is not pretty.
i would like to see a program to change the burn output on the atty, sounds like a good idea.make a better clean cycle maybe?
 

kinabaloo

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Thought about it a bit more ...

I think this could be useful for usb passthrough/charging, at the least. So need the charger chip (and a separate voltage regulator for passthrough? Certainly want passthrough voltage at 3.7 not 5 - possible anyway).

Better to line up the two LEDs and add a third for 'battery getting low'. Could be wire to else where in the case if desired.

Power tracks down the length of the board either side too.

And fixing holes.

And a place for the resistors for the LEDs.

I guess mogur that if you made one by hand first, that would generate the interest! And allow fine-tuning the design.
 
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mogur

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Hey boxhead, those minis are out, now, grin. The micro usb is the new standard- 1 amp continuous on the power pins, better plug gripping, more resistant to insertion damage, and TINY. The USB A to micro USB cord is already commonly available, just plug and go.

Hey, kina. I sorta hoped this might be a community effort. The foo-for-all was just a gimmick to suck out some interest in the pcb. The basic design is mainly just to make mods easier, all that fancy stuff will probably give way to just the charger circuit, an intelligent coil controller, and a manual switch. Even the micro could be dropped, but the software mods are free and would keep some of us off the streets for awhile. The fancy stuff could be provided on the board, room allowing, and just ignored for a basic hookup.
 
Some time ago I floated the idea of a NicoStick Kit.

I find the 2.1mm DC jack much stronger than the real 901 connector. Switched box, battery, LED and res, atty connector all from one place would be great! And optionally a PCB too for the deluxe kit :)

Optional touch switch too, and temp controller, if I can get it to work.
Oh, how much easier it would be to just put an LDR or such inside the atty ;)
 
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mogur

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Hey, funkybozu. No selling here, this is an open source community effort. Non-profit transactions would probably be required to keep the cost down, though, by buying in bulk.

Damn, I'm gonna need another bottle of rum to keep up with you, kina.

Sure, the boardhouse probably could populate the pcbs, my last run with them was a couple years ago, though, and I was hoping someone with better contacts than me would deal with that. I don't have reflow equipment handy, but could hand solder larger pitch smds.

Touch switch components and temp controller should be built into the board, of course. I meant this to simplify the construction, not complicate it, at least from a users POV. I think the pcb could be part of the simplest Nico stick kit, and wouldn't even require soldering, given a screw terminal strip. There's only four wires to deal with, two from the atty adapter, and two already in place in the battery box.

The LDR would get gummed up and require extra wires, but since we're dreaming, how about fiber optic interface? Grin. And a LDO regulator with low cell voltage over-ride?
 

boxhead

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well i ripped up this (had two, one broke) video cam that had the connectors i wanted but the tact switchs seem alittle weak from this $8.00 vcam. and the display part of the cam did have me thinking about some sort of user feed back on a mod, cam would play from sd card but not take new video so i know its good.
and why add three leds when a two color would work for a low power signal...and charging signal, the two color leds i saw have three leads...

you guys see this: DIY Kits - ?
 
well i ripped up this (had two, one broke) video cam that had the connectors i wanted but the tact switchs seem alittle weak from this $8.00 vcam. and the display part of the cam did have me thinking about some sort of user feed back on a mod, cam would play from sd card but not take new video so i know its good.
and why add three leds when a two color would work for a low power signal...and charging signal, the two color leds i saw have three leads...

you guys see this: DIY Kits - ?

2-color LEDS : nice idea :)
 
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