01-27-2005, 09:05 PM
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Location: brooklyn, new york
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Quote:
Originally posted by RacinSkillZ101
hey ninja828 id love to make a set for u, it can even b regulated, but it wouldnt b soon, i still gotta make mine wrk b4 i can sell it to ppl... hopefully this weekend ill sink my teeth into the project
hey moebrown20 ill get a drawing up tomm, itll b nice with colors and such and ill show how the connections goe and stuff
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Okay, I will check back then.
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01-28-2005, 08:16 PM
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hey moebrown20, heres ur fet schem... it should answer everyones questions regarding how to fet and regulate an xmod w/o spending 50 bux on a inferior version sold by a ripoff artist
some notes...
for regulated users,
-the input is w/e voltage ur batts are, i.e. 4X liion = 14.4V
-the output = 5V, used for the comp chip and if desired can power neons and other accesories
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if your not planning to run a regulated fet system, then discard the regulator and connect input wires where theyd normaly go on ur comp chip.
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random notes with the schematic,
-this is a top view, i.e. how theyd look if u stood above the finished product.
-wires can be put under the board to clean it up a bit, just be careful with your connections
-the optional switch is placed before the regulator so that it controls power to the entire system, thus eliminating the need for the stock switch
-for the high current wired id recomend no smaller than 22guage wires
-for the low current wires u could use ribbon wire from a comp
-make sure to take ur time organising wires and properly heatshrinking them, also do not allow any of the fets touch one another, the IRLs are grounded - and the IRFs are gorunded +, if they touch u get a nasty short that will fry ur fets and ruin ur expensive liions.
-please be care while soldering, and have fun!
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pic below is the property of racinskillz101 of Custom Engineering inc. if you steal it on me ill be pist!
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01-28-2005, 09:48 PM
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Okay, I won't steal you photo!
This one I have is the same as yours.
When I put it together, and run it with a high amp motor, one side starts to fry. Maybe i'm blind and I missed something. take a look:
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01-28-2005, 09:49 PM
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.
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01-28-2005, 11:17 PM
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err no lol u missed the point, the fets shount touch like that, in ur pic it shows the IRF + and IRL - touching... short will result.
mine is what i drew, if u do this it wont fry, with the lithium guy he had the 2 IRLs and 2IRFs touching, which is fine cause they shave a common gorund..
try it my way, exactly like the pic, and it will work...
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01-28-2005, 11:21 PM
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ok, i will let you know by monday if it works for me.
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01-29-2005, 10:27 AM
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TinyRC Pro
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Quote:
Originally posted by RacinSkillZ101
in ur pic it shows the IRF + and IRL - touching... short will result.
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oooohhhhhh....so thats what i was doin wrong...okayy...that makes sense...hey racinskillz...did u get my other email?
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01-30-2005, 10:08 AM
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heres what mine came out to look like, i havent received my 18 guage wire so i must still solder those for battery leads and motor leads...
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01-30-2005, 10:09 AM
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and yes it was hooked up
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01-30-2005, 03:16 PM
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I see now. I haven't had time today to start. I will give it a go later on tonight.
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01-30-2005, 04:25 PM
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Quote:
Originally posted by RacinSkillZ101
err no lol u missed the point, the fets shount touch like that, in ur pic it shows the IRF + and IRL - touching... short will result.
mine is what i drew, if u do this it wont fry, with the lithium guy he had the 2 IRLs and 2IRFs touching, which is fine cause they shave a common gorund..
try it my way, exactly like the pic, and it will work...
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What you say is not true 2 IRLs does not share the same common ground and your setup will not run properly at 35v maybe 9v not 35v.And the picture is right. 1 IRL and 1 IRF are mounted and share the same heat sink in the pic..
Last edited by jon.jon; 01-30-2005 at 04:27 PM.
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01-30-2005, 06:19 PM
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ok dude bare with me, im nothing getting nasty or nothing but look at the schem u posted, u got a + battery and a - battery going to the IRL and IRF fets, i thought that would cause a short, if it works for you thats cool, but im just being careful so thats why im keeping mine spread apart. also why wouldnt mine work at 35V??? the regulator says max input voltage of 35V, the motor im using is good till about 18V im not saying id go upto 35V maybe like 21.6 when this setup gets boring, but id still like to know why 35V wont work.
today i installed a switch to cut off the fets and motor, id make it to control everything but it would be too much wire and there isnt much clearance above the front diff. i got to soldering some other stuff together so all my ep needs now is a chassis (in the works) 18 guage wires custom motor (gotta start) and micro plugs.
i also have a question (hopefully some1 will help) i have a lithium charger from allelectronics when i hook it up its red (indicates charging) and turns green after about a min (indicates done) my voltage meter reads 7.7V coming from my 2X lith pack is that ok?? im new with liions and dont wanna hurt em
heres my setup
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01-30-2005, 06:28 PM
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Quote:
Originally posted by jon.jon
What you say is not true 2 IRLs does not share the same common ground and your setup will not run properly at 35v maybe 9v not 35v.And the picture is right. 1 IRL and 1 IRF are mounted and share the same heat sink in the pic..
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Ok, Jon-Jon. I hook it up this way and one side over heats. Do you know why?
why does the p channel get the + source? Could that be the problem?
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Last edited by moebrown20; 01-30-2005 at 06:31 PM.
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01-30-2005, 07:33 PM
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dude just do it my way, i tested it with a 1.5V button batt (was scared) with my way even as messy as it looks theres no shorts..
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01-30-2005, 08:14 PM
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Because I have 3 xmods that I made from the same diagram that says its right and 2 xmods with the heat sinks on the mosfets touching each other.
Why it wont work properly for one the regulator alone wont get it and two you can do a simple test and see what Im talking about.
Run your xmod or motor with 7.2v squeeze the trigger then let it go listen and watch to how the motor continues to run a little before it stop.
Now run your xmod at 11v or higher do the same test you will see how fast the motor will stop due to all the resistance and also cause the mosfets to overheat.
Ill tell you now that a 7.2v xmod with less resistance will not out perform a 11v xmod with more resistance.
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