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Home > Video > Video Display > Sound to Light using RGB LED Strip

Sound to Light using RGB LED Strip

This is the latest version of my RGB LED Strip sound to light controller circuit. Basically the sound module sends a signal to the Arduino Micro Controller, which then sends a PWM Pulse Width Modulation)Signal to each of the RGB (Red, Green, Blue) NPN MOFSET’s (Metal Oxide Field Effect Transistor), which in turn pulses the channels on the LED Strip, according to the sound pulse width. The MOFSET’s have to switch -12VDC up to 5 amps in total, per channel. This means that something like 15m of the strip can be controlled from this one board.The micro controller is supplied with 5VDC through a voltage regulator. Both power sources have a smoothing capacitor.I designed the PCB, and constructed it using the toner transfer method. This basically done by printing the circuit out on a Laser Printer, and then ironing the Toner onto a thoroughly clean copper clad PCB Board. Ordinary paper can be used, but photographic paper works better, however I use a special toner transfer paper I buy from China. Once the circuit has been transferred, I then etch it in Ferric Chloride, which removes all the copper that is not covered by the toner transfer. Then a thoroughly good clean with Acetone (use the wife’s nail varnish remover!) , and the board just needs populating with the components, and soldering.The RGB LED Strips can be bought for around £12-£15 from China, with remote control. A 12VDC 5A power source will also be required. The board has the capability of being able to plug the Chines pre-programmed controller directly into the board, as a dual purpose device. Whichever one is powered, it will be able to control the same strip (Important: do not supply both controllers at the same time). I have placed protection diodes to stop one controller being damaged, whilst the other one is on.

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