KIS-3R33S - NC Switch for ON/OFF ?

[Topper]

Just started to testing with breadboard my first VV mod (after few months of reading here )
But happens some strange - the DC-DC converter works w/o switch? So if I want to vape with them I must use tactile NC contacts? Is it possible or I'm doing something wrong ?
So many people and so many diagrams I've read but nowhere I met NC switch for this board?
Any help palls...

 

[slimest]

If you mean main power switch (master switch) - it's your choice, the board reliably works without it, but you can use it for more safety. To vape you have to use normally opened button: tact button
I use this schematic of the button. Depending on the LED and input voltage you can lower R2 to, say, 1 Kohm. R1 - any 5-10-50 Kohm resistor.

 

[Topper]

Thank you very much! My question was bout fire button, not main switch.
I'v done it with 100K to GRN and tactile between + and on/off pin, but definitely your schematic is much much better.
Thanks again and good vaping bro

 

[slimest]

If you short pin 7 of the chip and +, there is a risk to damage internal protective zener. Its voltage is 7V, so on fully charged two lithium batteries in series this zener can be burnt. In my schematic R1 limits current through zener.
We discussed this here: http://www.e-cigarette-forum.com/fo...z-2x-10440-9v-batt-box-mod-2.html#post5435013

 

[Topper]

You are quite right!
Miss to mention - 45k before tactile Saw the zener in datasheet and predicted the need of resistor.
Thank you for the link, will read every row carefully !