Recent content by John Readman

  1. J

    How to make a remote control on / off switch

    Hi Sakha, This is a very good idea. I had been thinking about pulling apart a remote dimmer switch for interior lighting. Your way sounds more fun.
  2. J

    How to make a remote control on / off switch

    Hi all, I would like to make a simple remote control on / off switch. It is for a string of LV leds. 12 V and 0.24 amp running from a battery supply. I would simply like remote switch instead of a toggle so no one else can fiddle with it. Can anyone help me, I have been scouring the...
  3. J

    Wiring Query: 24V 3W Light Bulbs for Christmas Decoration

    Hi all, These are a new idea I am working on and not just normal fair lights. I have a set made and wired in series, they work fine. However, prior to leaving them running I would like to find out the way in which the number of watts and amps are totalled up. Could someone give me any advice? Johnny
  4. J

    Wiring Query: 24V 3W Light Bulbs for Christmas Decoration

    Hi all, This will be very basic I am sure. I am wiring 10 number light bulbs together in series to be used as a Christmas decoration. They are 24V and 3W. What are the minimum wire properties I should be using 240V and ?? watt? I am also interested in internal shunts, so that if one bulb...
  5. J

    Why won't my LEDs light up with 9V and 60 Ohm resistance?

    Hi, I am trying to wire some leds up. There are 5 of them in series VF typ 3.2 V and 30mA. I am using a 9V square battery. 60 Ohm of resistance and an on off switch. Yet it does not light up. Is this because I do not have enough voltage?? P.S. Yes the switch is on! Thanks, Johnny
  6. J

    Solving LED Power Supply Issues: Tips from John

    Thanks for your post. Let me offer an example I am linking 10 No LEDs in series (I think, they are one after the other) Reverse Current VR = 5V Power dissipation 120 mW DC Forward Current 30 mA Peak Forward Current [1] 100 mA Reverse Voltage 5 V Which of these pieces of info would I...
  7. J

    Solving LED Power Supply Issues: Tips from John

    Hi, I am trying to link up a series of LEDs and having a bit of trouble calculating the power supply needed. I am actually doing this for a number of applications and wondered if anyone had a system for working this out?? Thanks, John
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