Electronics mic502 PWM IC

Discussion in 'Modding' started by Shuriken, 15 Feb 2003.

  1. Shuriken

    Shuriken same christmas AV for a whole year

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    is there any where other than Rapid that stock the mic502 Pulse width modulation IC (england) as Rapid dotn have them at the moment. ive made a circuit using a couple of 555's but its big and has over modulaion issues, the micrel chip would solve this prob methinks.
     
    Shuriken, 15 Feb 2003
    #1
  2. Oclocker

    Oclocker What's a Dremel?

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    I have one here new and sealed - if ya can pay by paypal/nochex ya can have it for Rapid price (inc VAT) + 50p postage? Off to US monday so let me know asap..
     
    Oclocker, 15 Feb 2003
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  3. acrimonious

    acrimonious Custom User Title:

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    Oclocker the electronics pimp;):hehe:
     
    acrimonious, 15 Feb 2003
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  4. Oclocker

    Oclocker What's a Dremel?

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    Well if it helps anyone I'll pimp all day - :)

    That chips sat here for a few months and may never actually find time to use it :(

    More pimpage first 4 people to e-mail me asking for a q-touch IC get one free and gratis inc postage - must be in US or UK. And must find specs etc themselves..

    Drawback they are SMD :( and soddin tiny to boot.. :)

    EMAIL ONLY!!!!!!

    And yes I AM Scottish despite giving away freebies :)

    one QT113
    one QT114
    two Qt115

    available..

    114 is for level sensing IIRC..
     
    Last edited: 15 Feb 2003
    Oclocker, 15 Feb 2003
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  5. cpemma

    cpemma Ecky thump

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    Email winging your way :clap:

    Back on topic, I've just finished a PWM controller using a LM324 and IRF530, works just as well as the MIC502 I've built, though it's lacking the fancy jump-start and sleep features. Should have construction details up soon.

    [​IMG]

    edit: Now up
     
    cpemma, 15 Feb 2003
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  6. cpemma

    cpemma Ecky thump

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    cpemma, 21 Feb 2003
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  7. compmaniac

    compmaniac What's a Dremel?

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    I was able to order one (ok bought two) MIC502BN from Newark for 2.12 USD. Ther are US based but will sell to hobbist.
    I did complete the full (sleep, temo sensor) PWM circuit and am happy with it except it doesn't seem to be very sensitive ?????

    Part number: 05C4624
     
    compmaniac, 23 Feb 2003
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  8. eaterofpies

    eaterofpies What's a Dremel?

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    cpemma 0\/\/|/|Z j00 :D (i hate leet speak btw but i use it occasionally for some unknown reason :-/ )

    time to silence that delta MUAHAHAHAHA
     
    eaterofpies, 23 Feb 2003
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  9. eaterofpies

    eaterofpies What's a Dremel?

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    ive got a brilliant idea to make cpemmas little pwm jobbie go funkeh on yo *** :D

    got idea from digital pot ideas but wont actually use a digi pot (cos mappers dont seem to stock em (GRRRRRR)
     
    eaterofpies, 24 Feb 2003
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  10. Shuriken

    Shuriken same christmas AV for a whole year

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    id forgotten id asked this, thanks to all who answered, managed to fix overmodulation (part of the problem was none of the potentiometers at college are anywhere near there quoted value, 10k was more like 12.5K!!) in case anyone is interested ill try to post the circuit somtime soon.
     
    Shuriken, 24 Feb 2003
    #10
  11. cpemma

    cpemma Ecky thump

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    Most pot specs are +/-20% tolerance, makes it nasty to design potential dividers like on the MIC502 or my LM324 circuit. :grr: :wallbash:
     
    cpemma, 24 Feb 2003
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  12. acrimonious

    acrimonious Custom User Title:

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    There not mutually exclusive ya know, i've had a free boot up the arse many a time!!
     
    acrimonious, 24 Feb 2003
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