Micro 60W Box

[fasteddie600]

So project for the GF has finally been done. She wanted a box but something a little more manageable than the usual boxes.

It contains a Turnigy 35-100C 750mAh battery, 2 stage LED on button(dim when atty attached, bright when firing), MOSFET switching, 1A charger, 16mm FDV spring loaded 510.

I have tested this over last couple of days and running 0.2ohm coil with 0.5v drop it handles 60W+ without any issue and MOSFET stays nice and cool, so it is actually performing about the same as my 2 x VTC5 mod! Charging takes about 30mins which is handy as it doesn't last very long at big loads.

It actually kicks harder than my 18650 mechs! I might have to build myself one now.

 

[1000moths]

Very nice

Sent from my SM-G900F using Planet of the Vapes mobile app

 

[T wisted]

Great job

Sent from under MT's shoe......

 

[blademansw]

Very nice m8 :-)

 

[BaDaBooM]

Very nice work mate. Only thing that concerns me is having the mosfet touching the battery if were to overheat.

 

[fasteddie600]

Very nice work mate. Only thing that concerns me is having the mosfet touching the battery if were to overheat.

Cheers badaboom, it was one of my concerns which why I tested it to some extremes to check the MOSFET wasn't going to get more than warm. I was looking at ways of insulating the MOSFET from the battery but best I have come up with is to glue it in place with a very slight gap, the heat sink should melt the back cover (the plastic is quite sensitive to heat) before it does anything really nasty to the battery. If the box had been a few mm bigger I could have put the FET in the top ;(

I did test the 1st one I made to destruction and the FET blew in a big flash but the battery was ok(now been put in the WEE pile to be disposed of), I decided orientating the heat sink away from the battery was best to avoid general heating of the battery as most of the heat seems to be up the back side/heat sink of the MOSFET under extremes.

The GF has been briefed on removing atty during transport/to turn it off and to launch it if it ever gets on the hot side of things. All the same stuff she has been told for her mech mod. But the way things are going she may struggle getting her hands on it as I am really enjoying using it while I check it all over for another week or so.

Cheers guys for comments!


Sent from somewhere inside a huge cloud!

 

[BaDaBooM]

Cheers badaboom, it was one of my concerns which why I tested it to some extremes to check the MOSFET wasn't going to get more than warm. I was looking at ways of insulating the MOSFET from the battery but best I have come up with is to glue it in place with a very slight gap, the heat sink should melt the back cover (the plastic is quite sensitive to heat) before it does anything really nasty to the battery. If the box had been a few mm bigger I could have put the FET in the top ;(

I did test the 1st one I made to destruction and the FET blew in a big flash but the battery was ok(now been put in the WEE pile to be disposed of), I decided orientating the heat sink away from the battery was best to avoid general heating of the battery as most of the heat seems to be up the back side/heat sink of the MOSFET under extremes.

The GF has been briefed on removing atty during transport/to turn it off and to launch it if it ever gets on the hot side of things. All the same stuff she has been told for her mech mod. But the way things are going she may struggle getting her hands on it as I am really enjoying using it while I check it all over for another week or so.

Cheers guys for comments!


Sent from somewhere inside a huge cloud!

I understand you know what you are doing but I always like to post safety tips as there is a lot of new users browsing the forum. Putting something like a fiberglass cloth between the mofset and the battery would make sense.

Keep up the good work.

 

[fasteddie600]

I understand you know what you are doing but I always like to post safety tips as there is a lot of new users browsing the forum. Putting something like a fiberglass cloth between the mofset and the battery would make sense.

Keep up the good work.

I'm really not sure I know what I am doing!
I do appreciate you pointing anything you see that could be an issue because it could be something I hadn't thought of. Fibreglass is a great idea, I'm sure I had some matting kicking around somewhere I just need to pick up some resin, I think that could just squeeze under. Thanks for that idea!


Sent from somewhere inside a huge cloud!

 

[BaDaBooM]

I'm really not sure I know what I am doing!
I do appreciate you pointing anything you see that could be an issue because it could be something I hadn't thought of. Fibreglass is a great idea, I'm sure I had some matting kicking around somewhere I just need to pick up some resin, I think that could just squeeze under. Thanks for that idea!


Sent from somewhere inside a huge cloud!

You could just buy a lipo safety bag and cut it up, they can take some real heat. Think I paid about £2-3 for one on ebay, they are much bigger than look on the pictures about a4 size.

 

[RicModMaker]

Sweet little mod. Purse friendly ;-)