RGB Controllers and Common Anode LED RGB strip

LightwaveRF Community: Welcome Forums Installation and Troubleshooting RGB Controllers and Common Anode LED RGB strip

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This topic contains 1 reply, has 1 voice, and was last updated by  Chris 2 years, 7 months ago.

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  • #15210
     Chris says:

    Chris
    Key Master

    I’m in the process of having my conservatory rebuilt and I’m installing some lighting trough to uplight the frame. I would like to put RGB LED strip in to the trough.

    I’ve been in touch with my contact at Megaman and am told that they have a stock of LWRF RGB controllers, but they require common anode strip. Does anyone know of a supplier who specifically supplies common anode RGB strips? I need about 5m of it.

    The alternative is for me to buy one of the cheap chinese RGB controller solutions out there. If these hold their colour/function between power cycles then I guess I could just put in an inline relay for LWRF control, but it would be nice if I could get proper mood control involving different colours.

    Chris Mills Founder and Editor - LightwaveRF Community http://cpmills.com/ http://lightwaverfcommunity.org.uk
    #15363
     Chris says:

    Chris
    Key Master

    Turns out the controllers need common cathode not common anode and this is like rocking horse 5h1t in the UK! I have found a circuit diagram here: http://www.instructables.com/id/Connect-Common-Anode-RGB-LEDs-to-Common-Ground-RG/ which seems like it will convert common cathode to common anode through the addition of a separate power supply (or a separate connection of the original one I assume). The problem I have is that I have no experience of electronic circuit design so have no idea how to size/rate the components I will need.

    I have purchased 5M of common anode RGB strip (c/w controller and PSU) for the ludicrous sum of just £13.49 from here: http://www.ebay.co.uk/itm/251637521877 and am awaiting delivery. The strip appears to be 60 LED per meter and states that it requires 2A per colour. Watts = Volts x Amps so that’s 24 watts per colour or 72 watts total for 5M when on full white.

    I know the LightwaveRF RGB controller (the one sans 1M supplied strip) can handle a max 54 watts so wouldn’t be enough for 5M of this strip anyway but since this will only need to power the three transistors, I am hoping this will be plenty.

    Can anyone with electronics experience help me spec the components I will need to drive this strip? I am thinking 3x tip3055 transistors, is this a good start?

    Chris Mills Founder and Editor - LightwaveRF Community http://cpmills.com/ http://lightwaverfcommunity.org.uk
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ABOUT Chris

Chris works as a techie for a large IT service provider. He is a geek at heart and loves nothing more than trying to automate his home. The problem is, his wife simply doesn't get it and can't understand why they can't have 'normal' lights like everyone else! Chris is dedicated therefore to implementing automation in a family friendly way.

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