Radio Remote Control LED Dimmer Using NRF24L01 – Arduino Compatible

Rajkumar Sharma
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SKU: EL114360
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This is an easy-to-make LED dimmer using RF remote control. The project is capable of driving a load up to 24W (2A X 12V LED). Any 12V single or 12V LED strip can be used. This is an open-source Arduino compatible hardware that has Atmega328 microcontroller, Potentiometer, MOSFET, 5V Regulator, 3.3V Regulator, NRF24L01 Radio modules, and few other components. The same PCB can be used for Transmitter and Receiver. LED D2 Power LED, LED D1 optional.

Arduino Pins Transmitter

NRF24L01 RF Module: GND>>GND, 3.3V>>3.3V Regulator, CE>> Arduino Digital Pin D9, CSN>> Arduino Digital Pin D10, MOSI>>Arduino Digital Pin D11, MISO>> Arduino Digital Pin D12, CSK>>Arduino Digital Pin D13
Potentiometer: Analog Pin A3

Arduino Pins Receiver

NRF24L01 RF Module: GND>>GND, 3.3V>>3.3V Regulator, CE>> Arduino Digital Pin D9, CSN>> Arduino Digital Pin D10, MOSI>>Arduino Digital Pin D11, MISO>> Arduino Digital Pin D12, CSK>>Arduino Digital Pin D13
LED Driver MOSFET Gate: Digital Pin D3

Note: PCB has dual options, it can be used for transmitter and receiver, for transmitter don’t install Q1 MOSFET and CN4 connector, for receiver don’t install potentiometer. Upload the related Arduino code that is available as a download.

Credits: This is a modified code, original author R Girish

Arduino Code

Arduino code for transmitter and receiver is available as a download, uploading code is easy, follow bellow link for more details:

https://www.arduino.cc/en/Tutorial/BuiltInExamples/ArduinoToBreadboard

Receiver Features

Supply Receiver 12 DC (7-15V Range)
LED Load Up to 2A (2A X 12V = 1W To 24W) 12V LED.
Operating Frequency 490Hz
PWM Duty Cycle 0 to 100%
PCB Dimensions 54.61 x 37.31 mm

Transmitter Features

Supply 12V DC @ 70mA

Schematic

Parts List

NO	QNTY.	REF.	DESC.	MANUFACTURER	SUPPLIER	SUPPLIER PART NO
1	2	CN1,CN4	4 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5317-ND
2	3	D1,R2,CN2	DNP		DIGIKEY
3	1	CN3	NRF24L01 RF MODULE SEED STUDIO	SEEEDSTUDIO	DIGIKEY	ALIEXPRESS/AMAZON
4	1	D2	LED SMD SIZE 0805	LITE ON INC	DIGIKEY	160-1427-1-ND
5	2	C1,C2	22PF/50V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
6	3	C3,C4,C5	0.1uF/50V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
7	3	C6,C7,C8	10uF/25V SMD SIZE 1206	MURATA/YAGEO	DIGIKEY
8	1	Q1	FDD8870	ON SEMI	MOUSER	512-FDD8870
9	1	R1	1M 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
10	1	R3	220E 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
11	1	R4	10K 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
12	1	R5	10E 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
13	1	U1	ATMEGA328DIP	MICROCHIP	DIGIKEY	ATMEGA328-PU-ND
14	1	U2	LM117-3.3V	TI	DIGIKEY	LM1117MP-3.3/NOPBCT-ND
15	1	U3	LM78M05 SMD DPAK	ON SEMI	DIGIKEY	MC78M05CDTGOS-ND
16	1	Y1	16MHZ	ECS INC	DIGIKEY	X1103-ND
17	1	R6	POTENTIOMETER	TT ELECTRONICS	DIGIKEY	987-1307-ND

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