What is the point of reviewing a cheap timer module, especially if it is based on the ubiquitous 555 timer chip? Recently I got an ‘updated’ version of the common 555 timer relay module. This time it ...

I've been doing a lot of relay-based projects lately; building several light timer projects. The first couple used Arduino-class devices, simple relays and provided the ability to set multiple on and ...

Motion sensor circuits are there on the Internet for quite a while now. These circuits are mainly used to drive AC load (like lights, fans) in home automation or IoT projects. It is also very common ...

In this post we are reviewing the ESP-01 Wi-Fi Relay Module. It is one of the cheapest smart switches you can purchase currently for making smart home, internet of things, and other wireless do it ...

The program switches relay 1 and 2 alternately on and off with a period of overlap where both relays are on. The LEDs indicate active relay and, in the period of overlap, which relay will become ...