How do I connect 5V relay to NodeMCU?
Connect your 5 V relay supply to Gnd and “JD-VCC” on the three terminal connector. Connect your ESP8266 I/O line(s) to the relevant “IN”(s) on the relay board. Connect your ESP8266 5 V supply and not the 3.3 V to “Vcc” on the ten pin connector. Do not connect Gnd to ground on your ESP8266 board.
How do you power a relay with NodeMCU?
CIRCUIT CONNECTION
- Attach NodeMCU on Breadboard.
- Connect VCC of Relay with Pin 3.3V of NodeMCU.
- Connect GND of Relay with GND of NodeMCU.
- Connect Pin Signal of Relay with Pin D7 (GPIO 13) of NodeMCU.
- Connect one terminal of Bulb (Blue Wire) with Pin NC (Normally Close) of Relay.
Can a 5V relay drive a NodeMCU?
But I have no idea what values and why. That is, if the NodeMCU runs on 5 volts. To drive the relay you simply connect your 3.3V signal to ‘In’ (with common ground) Base current will be about 2.3mA with 3V drive, so it should drive the ~95mA coil + LED okay.
What kind of power supply does a NodeMCU use?
So, connect the NodeMCU’s Vin pin to 5V and one of the GNDs to ground of the input side power supply. Since I have used a bread board power supply on the output side of the relay module, it may be confusing to understand the connections.
How to connect NodeMCU digital pin to relay?
Connect NodeMCU Digital pin ( D4) to Input pin of Relay. Download the ” Relay_NodeMCU.ino ” file and open it up in the Arduino IDE. Then Create a new sketch and paste the code below in the Arduino IDE and hit Upload. You can tinker with it if you like based on the application, or just use it as it is.
How to connect a 5V relay to a VCC?
Simply connect 5V to your Vcc and the ground to GRD. Just connect 22k resistor to your GPIO to Vin wire and it should work fine. Thanks for contributing an answer to Electrical Engineering Stack Exchange!