micro_Amps

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Viewing 25 posts - 126 through 150 (of 1,249 total)
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  • in reply to: How many R/C related projects do ya have on the go #32029
    micro_Amps
    Participant
    • Posts: 1290

    Bloody hell, let me see, already run out of fingers.
    :)uA

    in reply to: It happened- bloody little kids on bikes ! #52936
    micro_Amps
    Participant
    • Posts: 1290

    You guys need some sling shots.
    :)uA

    in reply to: Li-poly batteries in a bit/pht2 or ma please look #52933
    micro_Amps
    Participant
    • Posts: 1290
    Quote:
    I think I read somewhere if you charge it with 2c that it just reduce the cell lifetime, nothing else… Has anybody tested this?

    Be warned, this is not merely a manufacturer warning, if you charge above 1C you will destroy the cell.
    Let me put it this way, if you charged a LiPo with a standard peak charger at alot more than 1C the worst that can happen is this……
    Firstly, cell heats up,
    Then electrolyte inside cell boils, vapourising, and inflating the cell,
    By the time the cell is fully inflated cell will be almost at ignition temperature,
    As the cell ruptures the flammable electrolyte catches fire,
    This ignites the insides of the lithium cell which will burn like magnesium until it runs out of fuel, it cant be extinguished.
    I’m not joking, Lithiums are dangerous if handled incorrectly.
    I know of one instance where a guy had his 4WD burnt out because of a LiPo cell. So be careful with them, dont leave them charging unattended.
    Also, just to demonstrate how fragile their chemistry is, if you excede 4.2 volts while charging, the battery will be ruined permanently, throw it away. Thats why they need a special charger.
    End of rant.
    :)uA

    in reply to: ROBOSAPIEN #52931
    micro_Amps
    Participant
    • Posts: 1290

    They look pretty good, IR RC only as far as I know, but I have heard that they may be able to be tapped into to modify their behaviour.
    Let us know how it goes.
    :)uA

    in reply to: heatshrinking? #52892
    micro_Amps
    Participant
    • Posts: 1290

    Battery pack heatshrink is still in tubing, but the diameter is larger and the heatshrink plastic is much thinner. You can buy it in sizes that are specifically for different battery sizes, eg AA or C. Most good hobby shops carry it.
    :)uA

    in reply to: www.auctionsniper.com #32087
    micro_Amps
    Participant
    • Posts: 1290

    Same here, not reliable, thumbs down.
    Missed the auction because I relied on it.
    I suppose its free for a reason.
    uA

    in reply to: Li-poly batteries in a bit/pht2 or ma please look #52856
    micro_Amps
    Participant
    • Posts: 1290

    Yes, if you go much higher the cell will heat up and if it boils inside the casing will expand like a little balloon and its not reversible.
    There are rules that need to be followed for charging LiPos, and 1C maximum is one of them.
    :)uA

    in reply to: double stacked fet trouble??? #32127
    micro_Amps
    Participant
    • Posts: 1290

    You are probably right, might be a better option to use a higher resistance motor to lessen the motor current a little.
    :)uA

    in reply to: MEVOMONSTER…an oldy but a goody :) #52840
    micro_Amps
    Participant
    • Posts: 1290

    lol, still learning hey BH, evo looks good too.
    :)uA

    in reply to: Li-poly batteries in a bit/pht2 or ma please look #52839
    micro_Amps
    Participant
    • Posts: 1290

    BTW, very nice work there Hachi, as always you have taken the time to do your homework first and come out with a very good result.
    :)uA

    in reply to: Li-poly batteries in a bit/pht2 or ma please look #52838
    micro_Amps
    Participant
    • Posts: 1290
    Quote:
    Can 2 parallel li-ion cells be charged simultaneously as single with double current ?

    Yes they absolutely can. Once they are connected together in parallel they can be considered as ONE cell, and charged at 1C accordingly. So your 2 x 80mAh cells can easily be charged at 160mA for 1 hour.
    :)uA

    in reply to: power for Z and Xmod #52794
    micro_Amps
    Participant
    • Posts: 1290

    I tried to order some of these and after a few days they cancelled my order, I am yet to receive my refund. So at this stage I would say DONT BOTHER, they arent shipping them.
    uA

    in reply to: Another fet question #32145
    micro_Amps
    Participant
    • Posts: 1290

    Not so, so long as the gates are connected in parrallel as well all of the connected fets will only need the same voltage to be turned on.
    If you know what I mean,
    :)uA

    in reply to: What phone do u hav? #32160
    micro_Amps
    Participant
    • Posts: 1290

    Nokia 3200, newey, now I just have to get some better games organised, supplied games suck. Good for wasting time when waiting for the bus tho.
    🙂 uA

    in reply to: Hi im new! #32159
    micro_Amps
    Participant
    • Posts: 1290

    Welcome Master Spazez, bit of a shack fan are we?
    🙂 uA

    in reply to: double stacked fet trouble??? #32157
    micro_Amps
    Participant
    • Posts: 1290

    Triple stack and a LiPo should work very well, overkill, but hey the more the better right !
    🙂 uA

    in reply to: Another fet question #32156
    micro_Amps
    Participant
    • Posts: 1290
    Quote:
    Good to see ya uA haven’t seen you on here in ages……
    yea, I’m sure he’s a busy busy boy….. 🙂

    I am still here on most days just for a peek and to see whats happening. Work is overwhelming atm, but has its good points as well ($$$)
    Dont want to hijack this thread so I’ll stay on topic…

    How did you go Hachi? any luck there?
    🙂 uA

    in reply to: Another fet question #32203
    micro_Amps
    Participant
    • Posts: 1290

    It might if the fets are not turned on fully you might find power to the H bridge restricted slightly. Dual cell with P & N fets does work well, but I havent actually trested them side by side, I usually just use N chanel fets as they are lower resistance anyway (I think ?)
    🙂 uA

    in reply to: double stacked fet trouble??? #32218
    micro_Amps
    Participant
    • Posts: 1290

    Sounds like it might be a soldering problem, hard to say really without hands on. Try and work through it and see which is not working, fwd or rev. If its both have a look at the power supply and see if the H bridge is actually getting voltage correctly.
    🙂 uA

    in reply to: Super slick pics!!!! #32322
    micro_Amps
    Participant
    • Posts: 1290

    The car is a dual cell, same cells as a BCG, FET modding, well the jury is still out. I have attempted one but it looks like the same type of logic as a super BCG (and we all know what happened there.
    Now that they are available locally I am going to have another go at fet modding and autopsy it if I have to.
    uA

    in reply to: Super Slicks now in AU! #32526
    micro_Amps
    Participant
    • Posts: 1290

    Yeah, I ‘ve had a play with a few of these that came in for modding, they are a dual cell and take a 3rd cell extremely well. Motors are a good size, nice and powerful. I agree with OTP, they are the best of the non propo cars, and a propo mod would just make these even more fun. Good size controller and good design with the charging batteries in the handle section, which comes off and plugs into the underneith of the car.
    🙂 uA

    in reply to: Reedy TC Race of Champions 2004 #51931
    micro_Amps
    Participant
    • Posts: 1290

    Surely you have heard of Surikarn before, the man is a god.
    🙂 uA

    in reply to: F1 IRF7389 Fet Mod Success #51747
    micro_Amps
    Participant
    • Posts: 1290

    Good work AD, now to try a plasma dash
    uA

    in reply to: Can we have One Minutes Silence for my 1:10 Ultima #51343
    micro_Amps
    Participant
    • Posts: 1290

    At least it died while going flat out.
    :)uA

    in reply to: Paypal query #33326
    micro_Amps
    Participant
    • Posts: 1290

    More likely to be a problem with MiniZracer’s server, there is a worm going around at the moment that causes continuous rebooting, they might have it.
    🙂 uA

Viewing 25 posts - 126 through 150 (of 1,249 total)