If the light level increases (x == 0), the relay is turned OFF. Delay: A delay of 300 ms is added to prevent rapid relay switching. Conclusion This mini project is a simple yet effective demonstration ...

An Arduino Pro mini handles the selection between outputs by driving a selection of relays with appropriate timing.

Here, we are using a 4 relay module because we will only control four appliances. If you want to automate a different number of appliances, you can use a different relay module. There are many relay ...

All relay states switch off and the system changes it's state to 'emergency'. In emergency state (RED LED on) the Arduino waits for another 100 seconds for a valid command to leave emergency state. If ...

$4 Wemos D1 mini ESP8266 Board Supports Shields with a Temperature Sensor, a Button, a Relay, or a micro SD slot Wemos D1 board, a $9 ESP8266 board in Arduino UNO form factor, now has a little brother ...

The article is a tutorial on how to control 16 relay through Arduino microcontroller with Ethernet shield W5100.

Arduino has recently announced two new expansions to their Arduino Pro Opta PLC series – the Arduino Pro Opta Ext D1608E and Arduino Pro Opta Ext D1608S, the main difference between the two is that ...

The article is a tutorial on how to control 16 relay through Arduino microcontroller with Ethernet shield W5100.