I am new to Arduino programming and currently working on this instructable http://www.instructables.com/id/Control-Led-RGB/ (following this diagram http://cdn.instructables.com/F6Q/IMHF/I0LCDK6B/F6QIMHFI0LCDK6B.LARGE.jpg)

I have ordered these parts as well.

  1. Arduino Nano: www.ebay.in/itm/Arduino-Nano-SOLDERED-PINS-V3-0-ATmega328-CH340G-BUY-2-GET-1-USB-CABLE-FREE-/172117729247?
  2. HC-05: www.amazon.in/Bluetooth-Transceiver-Module-TTL-Outputs-HC05/dp/B00R95Y0AK?ie=UTF8&psc=1&redirect=true&ref_=ox_sc_act_title_2&smid=A1NDZY44BCNIQJ

My questions are:

  1. Is there need to add voltage divider? If yes can you please provide link?
  2. Can I connect two 5050 RGB modules?
  3. Will 12 V, 1 A will be enough to power this board.

1A will be enough to power you arduino but the total powerconsumtion will depend on the amount of leds that you want to drive. If you follow the instuctable, it should be enoug but it's never a good idea to use your power source at max capacity all the time.

It allows you to connect 2 modules indeed.

Why would you need a voltage divider?

  • hc05 logic works on 3.3v please check the ebay link thats why l want know about divider
    – MSK
    Jun 14 '16 at 14:08
  • Your arduino can give you 3.3V for powering it. If your board doesn't accept 5V logic, then you'll need a voltage level shifter.
    – Janw
    Jun 14 '16 at 14:26
  • do you have any link or example which I can use?
    – MSK
    Jun 14 '16 at 14:36
  • sparkfun.com/products/12009
    – Janw
    Jun 15 '16 at 9:53

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