Hi everyone, some information from someone who knows a little more about electronics would be greatly appreciated. i have made a few 14500 battery box mods with no problems, and now i'm trying to make a 18650 mod. i want to use one of these switches : Tactile Switch with Round Actuator, 300g and realize i need to limit the current so the switch doesn't burn out. also on MV they sell this regulator : LDO 5 volt, 3.0 amp regulator with control pin! Now it says in the description that it can work with 3.7V to use a smaller switch. I was hoping be able to make something work and still get it from MV. I just do not know how to wire it up, and what other items i need to make it work. Any help would be greatly appreciated. Thank you
new to modding, some help would be greatly appreciated
- Thread starter nygerski
- Start date
- th_trl_thread_readers 0
- Status
I've never really though about someone designing a mod around a specific switch but sure, I can see it 
Regulators allow you to vary (adjust) the voltage of one or more batts to what you like. If you use a boost reg. with one batt you can get an output voltage higher than that of the batt, but not without a cost...you will draw more current from the batt to do that, no such thing as a free lunch I'm afraid. If you were to use 2 batts and wire them in series or connect them end to end like say you would in a flashlight so that you get 7.4v then you would use a buck reg (the MV reg you posted) which allows you to drop the voltage down...these regs (not all mind you) have "control pins" which allow the reg or IC to be turned "on" via a very low current switch...I know you didn't ask for a summation of advanced modding but I like to see people succeed at this and I think you may be kind of putting the cart in front of the horse looking at regs just so you can use a tact switch...honestly, I think tinkering with more advanced regs, tact switches and control pins (or stand alone mosfet switching) is more like lesson 3...I would get my feet wet with a simple variable volt mod first, MV also has kits for those, after which you'll have a much better understanding how things work...keep at it though, visit the battery mods thread often, it'll become clearer. Luck nygerski
Regulators allow you to vary (adjust) the voltage of one or more batts to what you like. If you use a boost reg. with one batt you can get an output voltage higher than that of the batt, but not without a cost...you will draw more current from the batt to do that, no such thing as a free lunch I'm afraid. If you were to use 2 batts and wire them in series or connect them end to end like say you would in a flashlight so that you get 7.4v then you would use a buck reg (the MV reg you posted) which allows you to drop the voltage down...these regs (not all mind you) have "control pins" which allow the reg or IC to be turned "on" via a very low current switch...I know you didn't ask for a summation of advanced modding but I like to see people succeed at this and I think you may be kind of putting the cart in front of the horse looking at regs just so you can use a tact switch...honestly, I think tinkering with more advanced regs, tact switches and control pins (or stand alone mosfet switching) is more like lesson 3...I would get my feet wet with a simple variable volt mod first, MV also has kits for those, after which you'll have a much better understanding how things work...keep at it though, visit the battery mods thread often, it'll become clearer. Luck nygerski
Thanks quig, that brought some of the lingo in the modding section down to my level of understanding. I was wanting to put a 18650 in one of the "coffin" boxes that MV sells, as to why i wanted to go with a small switch. i like 3.7v since all of my cartos and attys are sub 2.0 ohm.
What you need is a mosfet not a regulator if your staying with 3.7v....it acts as a relay for your switch...low current from your switch turns on the mosfet that connects the high current. I have used these mosfets for a couple years now with no problems...and you will need a 10k resistor. Here is a schematic for it.
http://search.digikey.com/scripts/D...en&site=us&keywords=IRLU3114ZPBF-ND&x=10&y=17
http://search.digikey.com/scripts/D...en&site=us&keywords=IRLU3114ZPBF-ND&x=10&y=17
Nygerski, MV has the schematic for the 5v regulated mod on the site, you use this schematic and simply substitute the dual batts for a single battery. Below a certain voltage the regulator just passes the input voltage on. Sounds like you want all the parts from MV which this will do. If in the future you want to use the 5v part, make sure you use a heatsink.
edit: at 3.7v this sort of gives you a mosfet from a regulator, not sure of an advantage of an actual mosfet over this, the circuits and build are similarly sized, I guess the one stop shopping would be the main factor. As a reg I was not impressed.
edit: at 3.7v this sort of gives you a mosfet from a regulator, not sure of an advantage of an actual mosfet over this, the circuits and build are similarly sized, I guess the one stop shopping would be the main factor. As a reg I was not impressed.
Last edited:
yeah, one stop shopping was what i was after, thanks to you all, some great info, i'll try out the one from MV since i'm already ordering some stuff from them, and if it ends up not working out, i'll order one of the mofset ones. either way i'm only out a couple bucks.
Oh I see...its not the usual 7805 regulator...."Mosfet like functionality down to 3 volts is ideal for 3.7 volt mods where you want to use a smaller switch".
Cool...then no problem I guess....except me needing to read more before opening my trap! lol
Good catch asdaq....
Cool...then no problem I guess....except me needing to read more before opening my trap! lol
Good catch asdaq....
I'm using one of these in a convertible copper mod, two 18350's for 5v and one 18650 for 3.7v. Same switch as OP except the 1G, pressed in.
Robert
Robert
How to Build a 5 Volt 510 Box Mod
You wire the reg the same as they show here. You can get the board and resistor at MV, too.
Robert
You wire the reg the same as they show here. You can get the board and resistor at MV, too.
Robert
Thanks for all the help and information. Gave it a shot, and ended up finding out there just plain wasn't enough room in the end of the box for a regulator on a board wired up like the 5v box from MV, so i just used that regulator and stuff to throw it in a 3xAA box and have a 5V mod laying around. Back to the drawing board for one of these coffin boxes. I'm thinking about one of the tactile switches i saw someone post a while back that can handle the load without a mosfet.
- Status
Similar threads
