Arduino nano + Led strips

Projects General Guidance
1

Hi Guys

I would like to use arduino nano + motion sensor + (1meter or less) leds strips. I just want to use it in small room (1x1 m). If I open door I want to arduino turns leds.

I have nano and motion sensor. I think I will connect power from 9V battery, if not from power adaptor.

Could you please tell me what else I should buy?

Regards
cry5t41

2

Could you please tell me what else I should buy?

Some LED strips might be a good idea. Forget the 9V battery. Use an AC adapter or a real battery.

3

Hi PaulS

Thank you for advice. Could you please tell me how I should connect led strips to nano. I was reading forum and all connection here are for RGB led strips. My leds are white only.

Should I use some transistor to connect?
Adapter AC 12 V ??

regards
cry5t41

4

LED strips are usually 3 LEDs in series with a current limit resistor, meant to be powered from up to 12V. This lets all 3 LEDs share the same 20mA of current, vs 3 LEDs in parallel each with a current limit resistor and drawing 60mA.
Examples here LED, LCD - dipmicro electronics
The Nano cannot sink that much current, it needs a buffer. AOI514 between LED strip - and Gnd.
Use 270 ohm resistor between Arduino pin and AOI515 gate, with 10K from gate to Gnd to ensure the MOSFET is off during an Arduino reset.

5

I use 32 on this board I offer for driving multiple LED strips independently, as seen in the video clips on the website

http://www.crossroadsfencing.com/BobuinoRev17/

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