Great little relay. If you are using a NodeMCU (the new esp8266 with built in wifi and the usp interface), then be sure to reduce your control pin voltage going to the In1 pin down using a resistor or the voltage will never drop low enough to completely turn off the relay. You'll see what I mean when you see the red LED's always on (albeit very low). In my case I just have a 22ohm @ 10% (red, red, black, white) with an LED coming off of the D01 pin that I'm using and then plugged into the In1 on the relay module. I'll just up the resistance on the final version once off the breadboard.The resistor and an LED dropped the voltage down low enough to actually turn it off.
Simple test sketch using arduino:
void setup() {
pinMode(5, OUTPUT); // setup the pin that you want to use to control the relay
digitalWrite(5, LOW); // turn off the relay at start
}
void loop() {
digitalWrite(5, HIGH); // turn on the relay
delay(1000); // Wait for a second
digitalWrite(5, LOW); // turn off the relay (this is the where the voltage was still too high that we lowered with the resistor)
delay(2000); // Wait for two seconds (to demonstrate the active low LED)
}
Thanks and best of luck!
Frequently purchased items with fast delivery
Page 1 of 1 Start over
Great Simple Relay that Works with NodeMCU (with a resistor to lower power)
Great little relay. If you are using a NodeMCU (the new esp8266 with built in wifi and the usp interface), then be sure to reduce your control pin voltage going to the In1 pin down using a resistor or the voltage will never drop low enough to completely turn off the relay. You'll see what I mean when you see the red LED's always on (albeit very low). In my case I just have a 22ohm @ 10% (red, red, black, white) with an LED coming off of the D01 pin that I'm using and then plugged into the In1 on the relay module. I'll just up the resistance on the final version once off the breadboard.The resistor and an LED dropped the voltage down low enough to actually turn it off. Simple test sketch using arduino: void setup() { pinMode(5, OUTPUT); // setup the pin that you want to use to control the relay digitalWrite(5, LOW); // turn off the relay at start } void loop() { digitalWrite(5, HIGH); // turn on the relay delay(1000); // Wait for a second digitalWrite(5, LOW); // turn off the relay (this is the where the voltage was still too high that we lowered with the resistor) delay(2000); // Wait for two seconds (to demonstrate the active low LED) } Thanks and best of luck!
Top reviews from the United States
There was a problem filtering reviews. Please reload the page.
- Reviewed in the United States on October 1, 2016
Great little relay. If you are using a NodeMCU (the new esp8266 with built in wifi and the usp interface), then be sure to reduce your control pin voltage going to the In1 pin down using a resistor or the voltage will never drop low enough to completely turn off the relay. You'll see what I mean when you see the red LED's always on (albeit very low). In my case I just have a 22ohm @ 10% (red, red, black, white) with an LED coming off of the D01 pin that I'm using and then plugged into the In1 on the relay module. I'll just up the resistance on the final version once off the breadboard.The resistor and an LED dropped the voltage down low enough to actually turn it off.
Great Simple Relay that Works with NodeMCU (with a resistor to lower power)
Reviewed in the United States on October 1, 2016
Simple test sketch using arduino:
void setup() {
pinMode(5, OUTPUT); // setup the pin that you want to use to control the relay
digitalWrite(5, LOW); // turn off the relay at start
}
void loop() {
digitalWrite(5, HIGH); // turn on the relay
delay(1000); // Wait for a second
digitalWrite(5, LOW); // turn off the relay (this is the where the voltage was still too high that we lowered with the resistor)
delay(2000); // Wait for two seconds (to demonstrate the active low LED)
}
Thanks and best of luck!
Images in this review
- Reviewed in the United States on April 7, 2017
- Reviewed in the United States on September 6, 2016
- Reviewed in the United States on October 20, 2018
