Carrier Board for ARDUINO + RF NRF24L01 + temperature and humidity sensors

DESCRIPTION

This board is a carrier board for Arduino Pro mini, it allows the assembly of the parts following :

• Arduino Pro mini

• RF board: NRF24L01 + 2.4GHz Wireless RF Transceiver

• Temperature sensor DS1721 -55°C à +125°C with precision 0.0625°C

• Humidity sensor DHT11 20 to 80% (relative humidity) +/-5%

• Battery power option, with a boost Max1724 (0.8V to 3.3V)

• Regulator LDO 5V to 3.3V option, in case of 5V powering and NRF24L01 which supports only 3.3V

The main application is a temperature and humidity sensor with Radio link, it is used in the FCALLBOX Main server

Sommaire

• Schematic

• Bill of materials

• PCB

• Assembly

• Cabling Sensor based on NRF24L01 without PA

SCHEMATIC

Download here the schematic in PDF format

BOM

Option POWER 5V or 3V3

• If power is 5V : do not populate R1, the power is then in 3.3V (important for NRF24L01)

• If power is 3.3V : populate R1 only

Top view Ref Description Manufacturer / reference R1 Resistor 0R 5% 0603 All brands C1,C3 Capcitor 10uF 10V 10% X5R 0603 All brands C2 Capacitor 100nF 25V X7R 10% 0603/TD> All brands U1 Regulator LDO 3.3V 500mA SOT23-5/TD> SPX3819M5-L-3-3 or MIC5504-3.3YM5-TR

Option Boost for battery operation

• Battery option : the battery will be connected to J2

• No Battery option : direct power from 3.3V or 5V of the Arduino

Top view Ref Description Manufacturer / reference L1 inductor 10uH 300mA min 1812 All brands C5,C6 Capacitor 10uF 10V 10% X5R 0603 All brands IC11 DC/DC boost 0.8V to 3.3V MAX1724EZK33

Temperature and humidity sensors option

• Do not populate R2 to power the sensors from GPIO of the Arduino (to decrease the consumption in idle mode) either populate R3

To view Ref Description Manufacturer / reference R2,R3 Resistor 0R 5% 0603 All brands R4 Resistor 47KR 5% 0603 All brands R5,R6 Resistor 220KR 5% 0603 All brands C4,C7 Capacitor 100nF 25V X7R 10% 0603/TD> All brands U3 Humidity sensor DHT11 DHT11 U2 Temperature sensor DS1721 Maxim (DALLAS Semi Conductor)

PCB

The board has 48x20mm dimension

Download here the manufacturing files

Assembly

La carte de dimensions 48x20mm

Download here the assembly drawing in PDF format

Cabling Sensor based on NRF24L01 without PA

3D model

Here is the 3D model for the integration on your designs :

Download here the 3D step file      Download here the 3D KIKAD file for the full assembly