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Breaktru Forum  |  eCigarette Forum  |  Modding  |  Topic: ptr08100 or ptr08060wvd
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Author Topic: ptr08100 or ptr08060wvd  (Read 53147 times)

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Offline styl3r

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ptr08100 or ptr08060wvd
« on: November 22, 2012, 11:25:47 AM »
 haven't been around for a while been to busy, Just getting back into it. Been trying to find an answer for this question:
using the ptr080100wvd i want to use a tactile switch so was thinking of using the inhibit pin 1 now the data sheet from ti doesn't really give any detail now. Using the original circuit that i employed in my TTS i showcased on here, of scoarse using your circuit if i connect a biased resistor transitor on pin 1 grounded to pin 3 and input into the transistor from my N/C tactile switch would this work. This is what i thought of using but as you know electronics is not my forté
http://uk.mouser.com/ProductDetail/NXP-Semiconductors/PDTC114ET215/?qs=sGAEpiMZZMt32xmUYxteeQxveqxYnTDl%252bFH%252bnFHbDVE%3d
or any info how to achieve this would be great ?

thanks
kev aka Styl3®

just looked at the physical size of this and far to small after something about 5mm+
yeah i think this type
http://uk.mouser.com/ProductDetail/Fairchild-Semiconductor/FJN4302RTA/?qs=sGAEpiMZZMt32xmUYxteee5LPI%252bR7nPURsaoVdycRvE%3d
« Last Edit: November 22, 2012, 11:41:32 AM by styl3r »

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Re: ptr08100 or ptr08060wvd
« Reply #1 on: November 22, 2012, 01:19:32 PM »
I found this, it can be done with a N/O tact switch. N/O switches are easy to find than N/C ones.
2N3904 is an NPN transistor


Update:
Just to clear things up, I am not endorsing the use of using the Inhibit pin. I am posting this because of the question asked.
« Last Edit: November 23, 2012, 05:40:24 PM by Breaktru »

Offline styl3r

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Re: ptr08100 or ptr08060wvd
« Reply #2 on: November 23, 2012, 02:30:40 PM »
thanks for the reply Dave. First question do Ti do a 3 lead transistor same spec as the fairchild i have looked but struggling to find one, also would the batteries drain alot when not in use?
I emailed Craig he said the best option it to go with a mosfet???????? and not use the inhibit pin. well thats the way i interpreted it. If a mosfet would be better again do you know which one Ti do for this.
I have also contacted Ti and explained what i required just to see if they can shed any light on it..... as you well know electronics is not my forté
any and all help would be much appreciated as i would love to use a tactile switch with my TTS mod
Thanks
styl3®

update found this one on ti LM395T/NOPB            http://www.ti.com/product/lm395
or
LP395       ://www.ti.com/product/lp395
« Last Edit: November 23, 2012, 02:41:41 PM by styl3r »

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Re: ptr08100 or ptr08060wvd
« Reply #3 on: November 23, 2012, 03:10:06 PM »
thanks for the reply Dave. First question do Ti do a 3 lead transistor same spec as the fairchild i have looked but struggling to find one, also would the batteries drain alot when not in use?
I emailed Craig he said the best option it to go with a mosfet???????? and not use the inhibit pin. well thats the way i interpreted it. If a mosfet would be better again do you know which one Ti do for this.
I have also contacted Ti and explained what i required just to see if they can shed any light on it..... as you well know electronics is not my forté
any and all help would be much appreciated as i would love to use a tactile switch with my TTS mod
Thanks
styl3®

update found this one on ti LM395T/NOPB            http://www.ti.com/product/lm395
or
LP395       ://www.ti.com/product/lp395

I agree with Craig. I have never and would never use the inhibit pin. You have a slight battery drainage using the inhibit pin because power is always supplied to the module. Go with the Mosfet. Either P-channel or N-Channel. I prefer the P-ch.
See: http://breaktru.com/smf/index.php/topic,616.0.html

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Re: ptr08100 or ptr08060wvd
« Reply #4 on: November 23, 2012, 04:39:10 PM »
styl3r, there's no need to PM me about this.  The information you need is readily available on the forum here.  See the link above.

Offline styl3r

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Re: ptr08100 or ptr08060wvd
« Reply #5 on: November 23, 2012, 05:40:00 PM »
yeah thanks craig, Dave gave me a link just ordered the farichild FDS6576 so give it a go next week. I think i understand how to fit it into the 08100 circuit.
Thanks guys

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Re: ptr08100 or ptr08060wvd
« Reply #6 on: November 24, 2012, 01:08:28 PM »
Ok guys i think i have got it now is this right.... see attachment
And thanks again for all your help
« Last Edit: November 25, 2012, 05:59:26 AM by styl3r »

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Re: ptr08100 or ptr08060wvd
« Reply #7 on: November 24, 2012, 05:10:43 PM »
Ok guys i think i have got it now is this right.... see attachment
And thanks again for all your help



Looks correct.  Just make sure which is the Drain and which is the source. Source goes to batt neg, Drain feeds the negatives.
I can't tell you the exact Gate to Source resistor value. Just check that it turns off to 0v and turns on to full battery voltage.

Just a note, my diagram that you edited... The fixed resistor of 240 ohms will give your the spec voltage max of 5.5v. If you are looking for a max output of 6v, use a 220 ohm.

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Re: ptr08100 or ptr08060wvd
« Reply #8 on: November 24, 2012, 06:36:46 PM »
Thanks for the reply yeah i didn't change the resistor value on the drawing but i do anyway. I now have another question about a on-off-on slide switch so i can isolate the whole circuit first on for voltmeter to display vaping volts then the second on position to show battery power. Now do i need to put a diode in the lead to the voltmeter so not to have the atty firing on 8v "possibly" see attached
and again thanks for all the help it is much appreciated........ been looking at ti dc/dc convertors with mosfet built in but cannot find anything in the range we are after seem to be all low output current.
« Last Edit: November 24, 2012, 06:41:58 PM by styl3r »

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Re: ptr08100 or ptr08060wvd
« Reply #9 on: November 24, 2012, 07:57:36 PM »
Thanks for the reply yeah i didn't change the resistor value on the drawing but i do anyway. I now have another question about a on-off-on slide switch so i can isolate the whole circuit first on for voltmeter to display vaping volts then the second on position to show battery power. Now do i need to put a diode in the lead to the voltmeter so not to have the atty firing on 8v "possibly" see attached
and again thanks for all the help it is much appreciated........ been looking at ti dc/dc convertors with mosfet built in but cannot find anything in the range we are after seem to be all low output current.

There is no need to use diodes and do not wire like that.
The link below shows Mamu's with a 2-way switch (Vin-Vout). I use a 3-way. (Vin-Off-Vout) SP3T slide switch: CKN10371-ND

Mamu's 2-way
http://breaktru.com/smf/index.php/topic,660.msg4965.html#msg4965


The lighting is too bright to see the display properly but listen to the narration:

http://www.youtube.com/watch?v=3lfbtNzZYsM
« Last Edit: November 24, 2012, 08:01:41 PM by Breaktru »

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Re: ptr08100 or ptr08060wvd
« Reply #10 on: November 25, 2012, 05:55:03 AM »
yeah thanks for that Dave i already saw this clip. Problem i have is i use a 2 wire voltmeter so thats why i cannot do it that way and i want to only use 1 slide for unit totally off, vaping voltage and battery voltage. I know it may not be right but would using a diode achieve the same result so when testing battery charge it cannot travel back and supply the atty? and suppose it begs the question what type of diode???
I use the the 2 wire digital voltmeter because i use different colour display, red, blue, yellow. The only downside of these digital ones is i have to shield them from the ptr08100 as it is high frequency switch so gets influenced from the module.
Also with the first schematic i posted for the mosfet, just to get it in my mind and stuck we are switching the negative to all the components. I have all negatives to terminal 3 on my board?
and as per usual fantastic help and advise, there is no other site quite like this one. Well done Dave
« Last Edit: November 25, 2012, 08:11:22 AM by styl3r »

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Re: ptr08100 or ptr08060wvd
« Reply #11 on: November 25, 2012, 11:20:44 AM »
I have 3 types of Digital meter including the one you are using.
The attached drawing should work with NO diodes and a SP3T slide switch.

« Last Edit: November 26, 2012, 03:41:01 PM by Breaktru »

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Re: ptr08100 or ptr08060wvd
« Reply #12 on: November 25, 2012, 11:35:04 AM »
Dave you are a legend i bow to your superior knowledge ;bow;  and you take pity on us from over the pond.........thanks a million for sorting this out. You will definatly go to heaven. I'm not religious but if i was you would be my God..........my world is in balance once again

Just looked at it again and i will still have to put another switch as i also wanted to isolate the whole mod so it wouldn't go off in your pocket !!!

« Last Edit: November 25, 2012, 11:48:57 AM by styl3r »

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Re: ptr08100 or ptr08060wvd
« Reply #13 on: November 25, 2012, 01:28:32 PM »
Dave you are a legend

Yes I have heard that but it when like this: "You are a Legend in Your Own Mind"    :laughing2:

You are welcome and I am happy that I can help.
Yes, an on/off would be good.

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Re: ptr08100 or ptr08060wvd
« Reply #14 on: November 25, 2012, 09:25:50 PM »
I have 3 types of Digital meter including the one you are using.
The attached drawing should work with NO diodes and a SP3T slide switch.

Nice going breaktru  :applaude: , thank you so much for the easy to follow pic. I was racking my brains  :wallbash: to come up w/ an easy slide sw to read Vin and Vout. I know it's probably easy for someone with the knowledge but it was a challenge for me.

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Re: ptr08100 or ptr08060wvd
« Reply #15 on: November 26, 2012, 05:46:16 AM »
Just a thought Dave that drawing i showed you with the diodes, that would work " i think" and then i would only need 1 sp3t or on-off-on slide switch.
something like this
http://uk.mouser.com/ProductDetail/Vishay-Semiconductors/1N4934-E3-54/?qs=sGAEpiMZZMtldOIVIVqa3SB24sXdKPOY9gN23lPJHIY%3d
« Last Edit: November 26, 2012, 08:23:05 AM by styl3r »

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Re: ptr08100 or ptr08060wvd
« Reply #16 on: November 26, 2012, 03:46:37 PM »
The mosfet is wired as an N-Channel. The part # of the mosfet is a P-Ch. My mistake. I assumed it was an N-ch because it was wired as one. Don't use that mosfet with your wiring.
I updated my drawing above to reflect the internals of the N-Ch. The wiring was correct. I also added the on/off switch in the battery negative. You can alternatively put the on/off on the battery positive.

I am going to delete your last post if it's alright with you, so not to confuse others of the P-ch / N-ch mixup.

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Re: ptr08100 or ptr08060wvd
« Reply #17 on: November 26, 2012, 04:54:55 PM »
yeah thats fine to delete it thanks for looking over it again. I was about to order the parts then looked at it again .... that god.... what model/make do you think would be best thanks Dave
just  a footnote i think i will use the okr-T/6
would this n ch mosfet do
http://uk.mouser.com/ProductDetail/Fairchild-Semiconductor/FQPF4N20L/?qs=sGAEpiMZZMsrr1kXJis%252bJ81%2fHR5ax8UcDv7KuMSJoJM%3d
« Last Edit: November 26, 2012, 05:11:29 PM by styl3r »

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Re: ptr08100 or ptr08060wvd
« Reply #18 on: November 26, 2012, 05:18:52 PM »
There are so many N-Ch's that can be used.
FDC637AN, FDD3706, IRLU3114, etc............

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Re: ptr08100 or ptr08060wvd
« Reply #19 on: November 26, 2012, 06:11:28 PM »
Does it matter if the RDS value is high or low, i have shown one low and one high ..... never let an electrician do a EE's job  :laughing2:
http://www.onsemi.com/pub_link/Collateral/NTD4963N.PDF
http://uk.mouser.com/ProductDetail/Fairchild-Semiconductor/FDB6030BL_Q/?qs=sGAEpiMZZMsrr1kXJis%252bJ%2fHyY0sDq83wc1YHCgNS3T0%3d

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Re: ptr08100 or ptr08060wvd
« Reply #20 on: November 27, 2012, 12:53:46 AM »
Yes I have heard that but it when like this: "You are a Legend in Your Own Mind"    :laughing2:

Yeah I can't wait to see what you're gonna make with that new controller D!   

You are gonna show everyone your progress as you build it, right?  :popcorn:

Need some good entertainment in here.... :applaude:

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Re: ptr08100 or ptr08060wvd
« Reply #21 on: November 27, 2012, 08:59:51 AM »
haven't been around for a while been to busy, Just getting back into it. Been trying to find an answer for this question:
using the ptr080100wvd i want to use a tactile switch so was thinking of using the inhibit pin 1 now the data sheet from ti doesn't really give any detail now. Using the original circuit that i employed in my TTS i showcased on here, of coarse using your circuit if i connect a biased resistor transistor on pin 1 grounded to pin 3 and input into the transistor from my N/C tactile switch would this work. This is what i thought of using but as you know electronics is not my forté
http://uk.mouser.com/ProductDetail/NXP-Semiconductors/PDTC114ET215/?qs=sGAEpiMZZMt32xmUYxteeQxveqxYnTDl%252bFH%252bnFHbDVE%3d
or any info how to achieve this would be great ?

thanks
kev aka Styl3®

just looked at the physical size of this and far to small after something about 5mm+
yeah i think this type
http://uk.mouser.com/ProductDetail/Fairchild-Semiconductor/FJN4302RTA/?qs=sGAEpiMZZMt32xmUYxteee5LPI%252bR7nPURsaoVdycRvE%3d
Does it matter if the RDS value is high or low, i have shown one low and one high ..... never let an electrician do a EE's job  :laughing2:
http://www.onsemi.com/pub_link/Collateral/NTD4963N.PDF
http://uk.mouser.com/ProductDetail/Fairchild-Semiconductor/FDB6030BL_Q/?qs=sGAEpiMZZMsrr1kXJis%252bJ%2fHyY0sDq83wc1YHCgNS3T0%3d

RDS(on) : the lower the better. It is the resistance when the device is in saturation, the mosfet is fully on. Saturation is determined by the rating of Vgs
The mosfet you picked is:
RDS(ON) = 0.018 Ω @ VGS = 10 V
RDS(ON) = 0.024 Ω @ VGS = 4.5 V

This one has a LOW Rds(on) : FDU3706 - Datasheet
RDS(ON) = 9 mΩ @ VGS = 10 V
RDS(ON) = 11 mΩ @ VGS = 4.5 V
RDS(ON) = 16 mΩ @ VGS = 2.5 V

See: Explained

Hopefully I explained this correctly. I knew jack about mosfets. I tried to gather what I can from our buddy Professor Craig. He's a great teacher.
« Last Edit: November 27, 2012, 09:21:52 AM by Breaktru »

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Re: ptr08100 or ptr08060wvd
« Reply #22 on: November 27, 2012, 11:23:56 AM »
see attached

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Re: ptr08100 or ptr08060wvd
« Reply #23 on: November 27, 2012, 11:38:50 AM »

Offline styl3r

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Re: ptr08100 or ptr08060wvd
« Reply #24 on: November 27, 2012, 12:10:43 PM »
right i will try again
do you think this will work even though i know a little crude so i only need 1 slide switch for off-vape volts-batt volts using diodes so no voltage leak to atomiser when testing battery volts

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Re: ptr08100 or ptr08060wvd
« Reply #25 on: November 27, 2012, 01:11:34 PM »
right i will try again
do you think this will work even though i know a little crude so i only need 1 slide switch for off-vape volts-batt volts using diodes so no voltage leak to atomiser when testing battery volts


It will work but the meter for output voltage will be ON always when vaping. I personally do not have my meter on when vaping.
Be aware of the polarity for the Diodes.
A 3 amp or better slide switch is required.
The forward voltage drop is about 0.7V for all normal diodes made from silicon. A 1N4001 (1A) diode will do (low current).

Don't forget that the  FDS6576 is the WRONG Mosfet.
Also don't forget to reverse the values of the fixed resistor and the trimmer.

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Re: ptr08100 or ptr08060wvd
« Reply #26 on: November 27, 2012, 03:14:12 PM »
ok that sounds good
and yeah i choose these n ch mosfet
http://www.onsemi.com/pub_link/Collateral/NTD4910N-D.PDF

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Re: ptr08100 or ptr08060wvd
« Reply #27 on: November 27, 2012, 04:14:22 PM »
One of the advantages of an N-channel is they have lower RDS(on)] and there's a cheaper, wider selection of them.  The disadvantage of an N-Channel is it switches the low side.  Switching the high side is usually easier from a design standpoint, but for a simple circuit like the one you're doing, it's not going to matter that much. 

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Re: ptr08100 or ptr08060wvd
« Reply #28 on: November 27, 2012, 05:18:07 PM »
thanks for that Craig i have chosen this
http://www.onsemi.com/pub_link/Collateral/NTD4910N-D.PDF

it has an RDS max (on) 9 mohm @10v
                                     13 mohm @4.5v
max v or 30v and max current 37A
cheers

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Re: ptr08100 or ptr08060wvd
« Reply #29 on: November 27, 2012, 07:39:03 PM »
Yeah I can't wait to see what you're gonna make with that new controller D!   

You are gonna show everyone your progress as you build it, right?  :popcorn:

Need some good entertainment in here.... :applaude:

How's the Berger-Miester's build going on the new controller?

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Re: ptr08100 or ptr08060wvd
« Reply #30 on: November 28, 2012, 01:31:03 AM »
How's the Berger-Miester's build going on the new controller?

Pretty good, he should be done with the prototype soon....I hope?

I'm having him make everything modular, so it should be interesting.

It'll be barebones until we can work out the 'redesigning' kinks.  :yes"

Got another one head your way with some extra goodies, so ya'd better crap-out that brainfart!!  :laughing2:

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Re: ptr08100 or ptr08060wvd
« Reply #31 on: November 30, 2012, 08:07:24 AM »
need some help guys i have wired the circuit as per my attached drawing the mosfet i am using is this  http://www.onsemi.com/pub_link/Collateral/NTD4910N-D.PDF
i have also wired straight to a supply without the tactile and slide switch and i get no power to the module or or output. Any chance of somebody looking at my schematic and telling me if it is alright as i am lost at the moment  i cannot understand unless i have the bought wrong mosfet?
thanks in advance guys
« Last Edit: November 30, 2012, 08:27:18 AM by styl3r »

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Re: ptr08100 or ptr08060wvd
« Reply #32 on: November 30, 2012, 09:35:28 AM »
Take out your Multi-meter and set it to DC voltage. Clip the positive meter lead to the POS post of battery. Touch the negative meter lead to Drain of the mosfet and see if you have a reading. If you have voltage (full batt voltage) then take the neg lead from Drain and clip it on to the Source of the mosfet and fire the tactile switch. See what you get.

Many schematics show a resistor value of a variety of values in the "K" range for the Gate to Source resistor. I have NEVER been successful with them. I must be an idiot according to the dozens of ECF modders who have used 10K, 47K. I would start a 1 meg ohm and work up until you get a reading at the Source of the mosfet. I've gone as high as 100 meg ohms on some mods using the touch instead of a tactile switch. If this is successful, make the same test again with an atty load because further tweaking maybe needed.
There is also a Mosfet thread going on right now at: http://breaktru.com/smf/index.php/topic,616.msg5608.html#msg5608
« Last Edit: November 30, 2012, 09:48:15 AM by Breaktru »

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Re: ptr08100 or ptr08060wvd
« Reply #33 on: November 30, 2012, 10:24:41 AM »
thanks for the super quick reply Dave, Right as they always say you always miss the obvious. Took the mosfet out and just activated a led with it and it works fine. Fitted back to my test curcuit ..... nothing. Removed  the ptr08100 and replaced with a new one and hey presto..... so i know it works,  haven't tried it under load yet but will do that shortly, thanks for the link to the resistor question, will troll through that later. I also have some bipolar transistors so might even give the inhibit pin ago and see what i get from that as well.
Thanks again Dave your help is always appreciated  :thumbsup:
Just working out how to get it all on a stripboard setup, and as small as possible  because space is pretty tight in those  2 x 18650 diy boxes.....
Will keep you updated ... oh yeah good link for the tutorial stuff, downloaded spice just a pitty they do not do the dc/dc modules we use like ptr08100 or okr. Now that would make life easy
later mate
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Re: ptr08100 or ptr08060wvd
« Reply #34 on: November 30, 2012, 10:43:41 AM »
just another quickie does the main on'off switch in the negative have to be at least 3 amps?

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Re: ptr08100 or ptr08060wvd
« Reply #35 on: November 30, 2012, 04:36:39 PM »
just another quickie does the main on'off switch in the negative have to be at least 3 amps?

Only if you don't want to burn it out or have a voltage drop across it.  :laughing:
Yes! 3A or more... I'm pretty sure breaktru made that clear.

A 3 amp or better slide switch is required.

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Re: ptr08100 or ptr08060wvd
« Reply #36 on: December 01, 2012, 10:15:26 AM »
trying to get a 3amp as small as possible but not easy as space in the 18650 diy box is vey limited

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Re: ptr08100 or ptr08060wvd
« Reply #37 on: December 01, 2012, 11:14:56 AM »
« Last Edit: December 01, 2012, 11:43:19 AM by Breaktru »

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Re: ptr08100 or ptr08060wvd
« Reply #38 on: December 01, 2012, 01:26:06 PM »
thanks for that Dave, just a thought why can't i put an on/off switch before the tactile switch as the n channel mosfet will keep the system off unless the tactile is pushed so if i cut the feed to the tactile with an on/off that would surly do the same????
cheers
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Re: ptr08100 or ptr08060wvd
« Reply #39 on: December 01, 2012, 01:54:16 PM »
thanks for that Dave, just a thought why can't i put an on/off switch before the tactile switch as the n channel mosfet will keep the system off unless the tactile is pushed so if i cut the feed to the tactile with an on/off that would surly do the same????
cheers
Styl3®

Yes it will work but why not put the on/off where breaktru suggested. This way you eliminate battery power to the board. I think it is a better way.

Also you said:
need some help guys i have wired the circuit as per my attached drawing.
i have also wired straight to a supply without the tactile and slide switch and i get no power to the module or or output.
thanks in advance guys

What happened? did you do what breaktru suggested? and what was the results. I'm very interested. Thanks styl3r

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Re: ptr08100 or ptr08060wvd
« Reply #40 on: December 01, 2012, 08:23:33 PM »
I agree... I would break either the pos or neg at the battery end with the on/off sw.

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Re: ptr08100 or ptr08060wvd
« Reply #41 on: December 02, 2012, 05:47:43 AM »
No shouting this is just putting it out there. with a mosfet we are breaking the battery supply, i suppose even better with a P channel mosfet as it cuts the positive but the N channel cuts the negative to the ptr or okr module from the battery. So as you said you agree with Breaktru about cutting the positive or negative from the battery. I am with the N channel mosfet breaking the negative from the battery. This is to demonstrate an argument in the technical sense that is.....
thanks guys for all the input, and  i have gone with a 3 amp on/off slide switch but just interested in other peoples views. And i suppose the best way to isolate would be a dp on on slide switch cutting positive and negative
« Last Edit: December 02, 2012, 06:12:18 AM by styl3r »

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Re: ptr08100 or ptr08060wvd
« Reply #42 on: December 02, 2012, 06:14:27 AM »
I agree... I would break either the pos or neg at the battery end with the on/off sw.

As i said in essence i am breaking the negative through the N channel mosfet, so if i isolate the supply to the mosfet this does completly isolate the negaive to the whole module.

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Re: ptr08100 or ptr08060wvd
« Reply #43 on: December 02, 2012, 06:18:42 AM »
Yes it will work but why not put the on/off where breaktru suggested. This way you eliminate battery power to the board. I think it is a better way.

Also you said:
What happened? did you do what breaktru suggested? and what was the results. I'm very interested. Thanks styl3r

Yeah the first one i am doing i have isolated the positive from the battery with a 3 amp sp on on slide switch, but i think the second i am going to isolate the positive supply to the N mosfet thus cutting the negative from the battery, in my eyes exactly the same result as the negaive from the battery goes straight to the N channel mosfet? your views as always are welcome the more the better

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Re: ptr08100 or ptr08060wvd
« Reply #44 on: December 02, 2012, 09:05:20 AM »
Styl3r, I see that you are making and selling mods on a different forum. Usually I don't offer advise to profiteers. There have been several others on this forum.

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Re: ptr08100 or ptr08060wvd
« Reply #45 on: December 02, 2012, 01:01:44 PM »
Styl3r, I see that you are making and selling mods on a different forum. Usually I don't offer advise to profiteers. There have been several others on this forum.

I am selling mods and have been for 18 months or so, as are others on here and many other forums. I don't see your point!...........you said  "There have been several others on this forum".... several other what? are you from the UK?
« Last Edit: December 02, 2012, 01:24:49 PM by styl3r »

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Re: ptr08100 or ptr08060wvd
« Reply #46 on: December 02, 2012, 01:29:19 PM »
Yes it will work but why not put the on/off where breaktru suggested. This way you eliminate battery power to the board. I think it is a better way.

Also you said:
What happened? did you do what breaktru suggested? and what was the results. I'm very interested. Thanks styl3r

you said" This way you eliminate battery power to the board" so would putting a on/off switch in the supply to the N mosfet as ALL negatives are disconnected until the tactile switch is pressed so by putting a slide on/off before the tactile would in fact do exactly what you have just stated

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Re: ptr08100 or ptr08060wvd
« Reply #47 on: December 02, 2012, 05:13:57 PM »
No shouting this is just putting it out there. with a mosfet we are breaking the battery supply, i suppose even better with a P channel mosfet as it cuts the positive but the N channel cuts the negative to the ptr or okr module from the battery. So as you said you agree with Breaktru about cutting the positive or negative from the battery. I am with the N channel mosfet breaking the negative from the battery. This is to demonstrate an argument in the technical sense that is.....
thanks guys for all the input, and  i have gone with a 3 amp on/off slide switch but just interested in other peoples views. And i suppose the best way to isolate would be a dp on on slide switch cutting positive and negative

That is correct styl3r, the mosfet does break the neg from the battery and putting an on/off in series with the tactile will do it. And... you can use a low amp slide switch.

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Re: ptr08100 or ptr08060wvd
« Reply #48 on: December 03, 2012, 05:14:29 AM »
Thanks for that Dave, in my field electrical this would be a contacter or relay and the coil would be where the isolation would be positioned. I must say without you guys i would not have got into electronics and am now finding it fascinating. I like the idea that there is definitely more than one way to skin a cat and even when you do it right, it doesn't mean it will work.
many thanks as usual.......

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Re: ptr08100 or ptr08060wvd
« Reply #49 on: December 03, 2012, 03:30:23 PM »
That's true, with electronics there are usually several "right" ways to do something.  You can get creative a lot of times.

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