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    LEDs
    16 Posts ยท 8 Followers ยท 0 Photos ยท 56 Likes
    Began 2 months ago by
    Warrant Officer
    United Kingdom
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    Latest Post 2 months ago by
    Commodore
    Italy
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    AlessandroSPQR
    Commodore
    ๐Ÿ‡ฎ๐Ÿ‡น Italy
    ๐Ÿ“ LEDs
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    Right ColinH, exact words, I agree with you.

    There are no problems with low voltages and low currents.
    The important thing is not to improvise with circuits and devices that use mains voltage (230 volts).
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    Colin H
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    ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom
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    We all make mistakes, that's how we learn.
    The man who never made a mistake never made anything.
    Cheers Colin.
    Fair winds and calm waters, COLIN.
    AlessandroSPQR
    Commodore
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    Don't worry PhilH.
    PhilH
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    Hi guys and thanks for good wishes and help ,I got on to the place where I bought the leds, he was quick to reply he told me to check the end of the wires ,it seemed strange that some work and some did not well it seems that the problem is the ends of wires have what have what the seller calls a protective covering may still be on ,well I have them and he is right,I did not it a thought I have all kinds of bulbs and always striped on the ends,I feel a bit stupid .
    All the time I have wasted and how frustrating it has trying to get them to work. Sorry but I just needed to tell someone.
    Philuk๐Ÿ‘
    PhilH
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    Thanks Peter not sorted yet but I think it may have a brain freeze on my part I made some metal light shades I think I may have shorted them out "What we call a schoolboy error" ๐Ÿคฃ๐Ÿคฃ been busy on the hulls of two boats I am working on I will post some pictures tomorrow ๐Ÿ‘ will be back at it having fun making rowlocks ๐Ÿ˜‚๐Ÿ˜‚ the name just makes me laugh. My wife says I am ascest ๐Ÿคฃ๐Ÿคฃ
    The spelling is intentional that what she said๐Ÿคฃ๐Ÿคฃ๐Ÿคฃ
    PeterL3
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    Hi philh don't worry we are all learning hope your lighting problem is sorted I am still learning at 81 you will get their in the end peterl๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ˜€
    PeterL3
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    Hi Phil hope you got your lighting problem sorted never worry about asking we all have to learn i am 81 and still learning regards peter l๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘๐Ÿ‘
    GregHiltz
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    Forvyears, I hated dealing with LEDs due to the liw voltage required, but I now stock and sell good 12volt LEDs in many colors.
    Len1
    Sub-Lieutenant
    ๐Ÿ‡บ๐Ÿ‡ธ United States
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    check with the supplier of the LED's as to what voltage they require if they have not already supplied a resistor. Bear in mind that different colors of LED's need different voltage.
    LEN1
    AlessandroSPQR
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    Hi PhilH.

    I can answer for what I wrote, not for what other modelers say.
    IIf you read carefully the fourth message of the topic "Led bulb / lights" you will see that all the answers are there.

    The LEDs can be powered directly at their nominal voltage.
    It corresponds to the voltage drop that an LED causes when electric current passes through it.
    This voltage is a factory data like the operating current. You cannot make electrical circuits with LEDs if you don't know these data.

    If you are able to supply the right supply voltage direct to your LED there is no need for resistor in series with it.

    Since not everyone has the ability to regulate the input voltage but simply has a battery, it may be necessary to insert a resistor in series with the LED.
    You said that you bought a voltage regulator if I'm not mistaken, so you don't need a resistor as long as you supply the right stabilized direct supply voltage to the LED.

    It is necessary to insert a resistor in series with the LED when the battery supplies a voltage higher than the nominal voltage of the LED.
    In this case the resistor will cause a voltage drop so that the right voltage reaches the LED.
    For example, if the forward supply voltage is 2 volts and you have a 9 volt battery you need to cause a voltage drop of 7 volts (9-2).

    To cause the correct voltage drop you must insert the resistor with the correct ohmic resistance value.
    How do you do?
    It's all explained in that message with very simple mathematical operations that apply Ohm's first law.
    There are also various examples with different types of batteries and with direct power supply to the LED at 2 and 3 volts.

    I also explained what the advantages and disadvantages of connections in series and connections in parallel are, as well as attention to the powers involved.

    For this reason, if you want me to help you, it is best to find that information and perhaps share it with images that make it clear how you connected the various components to each other.

    Don't worry, these are solvable problems.


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