Tact switch and mosfet transistor questions

[CraigHB]

Looks good.  I really like those PMOS from Vishay, pretty much my go to P-channel for switching power on and off.  I've measured 2 mOhms with those at 3.7V, can't do much better than that (using voltage over current measurement).  The TPS3700 is a great detector.  I used it in my last project (non-ecig) and it works flawlessly, simple and easy to wire as well.

[dc99]

Wicked cool David. Time to order some more boards.

[david4500]

Thanks Craig. Really appreciate all of your help especially in this thread as well as the rest of the forum.

Thank you also dc. You considering making a similar board was what helped push me to make the board. Hope they work out well for you if you get some from Oshpark.

[dc99]

Im sure this board will work as good as your others. Ive been using your board with the fuses on it. It has worked great. Perfect in a G-box with a printed sled

[david4500]

[studiovape]

Hi guys,
 I've been running several unregulated single 3.7v IMR (20-30AMP max discharge) cell BF mods for while now with a single  PSMN1R2-25YLC, is there anything better recently released in the SMD descrete 5x5x1.1mm package?
I ask only because i plan to make a few mods for friends and although I have had zero issues running 0.6Ohm coils I want to know why I should run more than one, incidentally they will be protected with MHP-TA15-9-77 , 15amp resetables between the battery negative and the source on the mosfet so will be tripping at around 60Watts assuming a 0.26Ohm coil and 4v.
Just because I haven't had issues doesn't mean others wont when a few are in the wild. I have though as stated had ultra reliable performance from the PSMN1R2-25YLC and they seem very resilient to slightly longer than ideal soldering periods.

[DIYFancyLights]

I've got a board on eBay with a PSMN0R9-25 and 15K pulldown resistor already soldered on. It also has holes large enough for 14awg stranded wire for the Source/Drain high current lines and made with 2oz copper to reduce losses. I got reports of people using it at 0.08 ohms without it warming up at all.

qty 1 - http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=261960134586
qty 5 with wire & heatshrink - http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=252096055090

There are other listings including a qty 10.

[Ian444]

Very nice work DIYFL, thanks for sharing 

[tj138waterboy]

Very nice Diyfl. I'm glad you and David4500 are doing those boards for the modders. I had one built a while back at oshpark but never got around to making it into a small package. Also if you're still around David, I have built and used 2 of your dualparamos minis and they are flawless.

[DIYFancyLights]

I'm sure David4500 will see it. He's the one that invited me here and we've been sharing ideas and possible designs.

[tj138waterboy]

I'm getting back into playing with cads oft and diptrace and I wanna try to replicate your 2 boards but try to add in some form of modular design possibly adding pin header so you could kinda make it like a plug and play upgrade. Unregulated with plug n play pwm.

[DIYFancyLights]

The key requirements I had for my board was as small as possible and 14 awg stranded for the high current wiring, and then I managed to squeeze in space for a through hole resistor for people that want to light an LED while vaping without having yet another dangling part.

A side effect of a clean through hole design, those people really needing high performance can parallel the MOSFET's just by stacking them.

[david4500]

Hey fellas! Yeah I still lurk around here from time to time... been a bit quiet lately... But anyways, TJ glad you like the boards. Making your own is much more satisfying, good luck.

[ebie]

Where can i purchase your PWM PCB David4500 ?