EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: Jasen on March 09, 2014, 10:46:44 pm
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Introduction:
Howdy all, I'm a novice but can build most anything with some guidance. I'm a residential carpenter by trade for 25 years , woodworker, shade tree mechanic for 35 years and have dabbled in electronics from a few simple circuits, playing with LEDs and repairing burnt component's and broken solder connections.
To the point:
I recent quite smoking after 35 years and I'm using an e cigarette and it's working. I've decided to build my own box mod using some schematics I got from a e cig forum. This is variable Volt 2.4-4.2v running off two 18650 3.7V 2600mah li-ion or li-ma batteries.
Some of the manufactured e cigs have a safety feature where you have to push the power button 3 times quickly to turn it on/off so as to not accidentally activate the unit in ones pocket, once said button energizes the button is then used to heat the coil to produce the vapor.
I've googled to no end and have found nothing. I can just use an on/off push button but that's to easy, I'd like to build a circuit like this, any guidance would be greatly appreciated.
Jasen
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short of using a 6/8 pin micro i am failing to see any non cumbersomely sized circuit options, (possibly a charge pump, you have to press it a few times quickly to turn it on and then every few seconds to keep it on)
edit: you could use the charge pump idea with 2 op amps acting as a window comparitor, press it 3 times to pass the lower threshold and latch the device awake, and enable power to a second pole on the switch, which you then use to turn on or off, and if you press it a few more times in quick succession it passes the upper threshold and turns itself off
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Rerouter,
Thanx for the input.