What is MQTT Relay Module Timer? This is a simple program that responds to MQTT requests by adding more seconds to a countdown timer. In its concept, it's just replacing a mechanical countdown timer ...

Each timer can be assigned to a day of the week, and for each timer the start and stop time can be set. For a week this means setting up seven timers. However, if your workweek is from Monday to ...

This module contains functions for accessing the hardware timers, and include delays in your programs. The functions of this module are organized in the following categories: The delay functions ...

WAGO 859 Series DIN-rail timer relay module provides On-/Off-delay timer modes and multiple time ranges for diverse applications such as switch and package “de-bounce” sensors. The 6mm device carries ...

This type of infrared proximity circuit is widely used as an electric switch where physical contact is not desired for hygiene purpose. For example, we commonly see use of infrared proximity sensors ...

In this circuit the 555 timer is used in a novel way, as a voltage controlled switch.The old and omnipresent NE555 can be very good at something it was not meant for: driving relays or other loads up ...

This timer switch for an electric water heater is based on NodeMCU and Blynk IoT cloud solution. An electric water heater is used in bathrooms during the cold season for bathing with hot water. A ...

This triac control module is a project for everyone interested in power electronics. It also gives you an opportunity to learn a bit about hardware-level programming. We describe all the wonderful ...

Recently an ad on YouTube about an acoustic light sensor/switch module piqued my interest. Out of curiosity, I contacted the online vendor and bought a pair. Named MR-SK50A, the module is less popular ...

I have already made some devices using SeeedStudio’s Seeeduino Nano microcontroller boards and Grove Sensors. In this post I am going to show you how to make a simple sound activated electronic switch ...