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    Motor suppression
    by MouldBuilder ๐Ÿ‡ฌ๐Ÿ‡ง ( Chief Petty Officer 1st Class)
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    5 Posts 4 Replies 2 Photos 6 Likes
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    MouldBuilder
    Chief Petty Officer 1st Class
    ๐Ÿ“ Motor suppression
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    Country: ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom
    Online: 2 hours ago
    ๐Ÿ˜Š View Profile
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    Thanks Doug. This will help me understand capacitor values in the future. I now have an understanding of resistors, capacitors, ic`s (a little) and diodes. Transistors next๐Ÿ˜Š
    I have attached a picture of the site that confused me๐Ÿ˜Ž
    I promise I will finish a boat project before I start another......Maybe.
    RNinMunich
    Fleet Admiral
    ๐Ÿ“ Motor suppression
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    Country: ๐Ÿ‡ฉ๐Ÿ‡ช Germany
    Online: 7 hours ago
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    Hi Peter,
    I guess these are ceramic capacitors.
    224 mean 22 x(10 to power 4) in Picofarad (pF) = 220000pF = 220nF. Or 0.22ยตF.
    I.e. the '4' means the number of trailing zeroes.
    Don't know where you 'looked up' the 1nF (1000puff as known in the trade!๐Ÿ˜ฎ)
    The leading 2s must appear in the final value!
    Thus 1nF would be marked 102 and 10nF 103.
    47nF should be marked 473.
    After the value code there is usually letter indicating the value tolerance; J, K or M indicating ยฑ5%, ยฑ10% and ยฑ20% respectively.
    So, to finally answer your question ๐Ÿ™„; I would use the 47nF capacitors. (=0.047ยตF)
    Older ones may be marked .047.
    Cheers, Doug
    3
    Young at heart - slightly older in other places ๐Ÿ˜‰ Cheers Doug
    MouldBuilder
    Chief Petty Officer 1st Class
    ๐Ÿ“ Motor suppression
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    Country: ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom
    Online: 2 hours ago
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    Thanks Martin. I have seen this and it seems to be generally a standard layout. My main problem is whether the capacitor already fitted by Krick is adequate as the positive to negative contact suppressor is usually 47nf but the ones fitted by Krick seem to be only 1nf.๐Ÿ˜Š
    Peter.
    1
    I promise I will finish a boat project before I start another......Maybe.
    Martin555
    Warrant Officer
    ๐Ÿ“ Motor suppression
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    Country: ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom
    Online: 2 hours ago
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    Hi mouldbuilder,
    There is an article in the How to's on the home page (motor suppression)
    I don't know if that will answer your question.

    Martin.
    1
    If it looks right it probably is.
    MouldBuilder
    Chief Petty Officer 1st Class
    ๐Ÿ“ Motor suppression
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    Country: ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom
    Online: 2 hours ago
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    I could do with a little electronics advice please.
    I have purchased two Krick motors with gearboxes for my Dusseldorf Fire Boat. I also bought the necessary capacitors for suppression. I have 47nf for across the terminals and 10nf for terminal to case. There is, however, a capacitor already fitted across the terminals which states a number of 224 on the casing. I have looked this up and it appears to be only 1nf, (1000pf). Is this acceptable to suppress this motor or should I change them to 47nf as per the instructions. Thanks.๐Ÿ˜Š
    1
    I promise I will finish a boat project before I start another......Maybe.



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