2 Channel Wi-Fi Relay Module Using ESP8266 NodeMCU

  • Rajkumar Sharma
  • 431 Views
  • easy
  • Tested
  • SKU: EL140830
  • Quote Now

The project described here is an ESP8266 NodeMCU Two Channel Relay Module. This board enables users to control 2 x relays remotely. The 2 channels can be controlled remotely using a webserver/WiFi connection. The project works with 5VDC. Two LEDs indicate relay operation. Screw terminals help user to connect devices and power the supply. Relay output has 3 contacts normally closed, normally open, and common. Relay can drive a load up to 10A/250VAC or 10A/30VDC. It can be used in applications such as IoT and smart Home/Home automation.

The board can be connected to a server through a TCP Client and also can be controlled by HTTP. With this module, users can upload firmware and can create a versatile IoT project. It is suitable for your smart home and IoT project with network control.

More details about the software and code are available here:

Hardware Details

  • ESP8266 MCUNODE (WiFi)
  • 2 x 5V Relay
  • 2 x LEDs Relay Operations
  • 2 x 3 Pin Screw Terminals (Relay Output Normally Open, Normally Closed and Common Connections)
  • 2 Pin Screw Terminal Power Input 5V DC
  • 2 x BJT (Transistors) drive relays
  • 2 x Flyback diodes
  • ESP8266 GPIO15 Connected to Relay 1
  • ESP8266 GPIO13 Connected to Relay 2

Features

  • Power Supply 5V DC
  • Current 100mA (when Relays are on)
  • 2 x Relay LED
  • 4 x 3MM Mounting Holes
  • Screw Terminal for Easy Connections
  • PCB Dimensions 57.63 x 53.98 mm

Connections and Other Details

  • CN1 Power Supply: Pin 1 = 5V DC, Pin 2 = GND
  • CN2: Pin 1 Normally Closed, Pin 2 = Common, Pin 3 = Normally Open (Relay 1 Contacts)
  • CN3: Pin 1 Normally Closed, Pin 2 = Common, Pin 3 = Normally Open (Relay 2 Contacts)
  • D2: LED for Relay 1
  • D4: LED for Relay 2

Schematic

Parts List

NOQNTYREFDESCMANUFACTURERSUPPLIERSUPPLIER PART NO
11CN12 PIN SCREW TERMINAL PITCH 5.08MMPHOENIXDIGIKEY277-1247-ND
22CN2,CN33 PIN SCREW TERMINAL PITCH 5.08MMPHOENIXDIGIKEY277-1248-ND
31C110uF/10V CERAMIC SMD SIZE 0805YAGEO/MURATADIGIKEY
41C2100nF/50V CERAMIC SMD SIZE 0805YAGEO/MURATADIGIKEY
52D1,D3SM4007 SMDDIODE INCDIGIKEYS1MBDITR-ND
62D2,D4LED RED SMD SIZE 0805OSRAMDIGIKEY475-1278-1-ND
72Q1,Q2BC847NEXPERIADIGIKEY1727-2924-2-ND
82RE1,RE25V RELAYAMERICAN/ZETTLERDIGIKEY3385-AZ943-1CH-5DE-ND
91R11K 5% SMD SIZE 0805YAGEO/MURATADIGIKEY
102R2,R32K2 5% SMD SIZE 0805YAGEO/MURATADIGIKEY
111U1ESP8266NODEMCU MODULEEBAY/ALIEXPRESSDIGIKEYEBAY/ALIEXPRESS

Connections

Gerber View

Photos

ESP8266 NodeMCU Datasheet

Please follow and like us:
Pin Share

PCB

Subscribe
Notify of
guest

0 Comments
Inline Feedbacks
View all comments

RELATED PROJECTS

TOP PCB Companies