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Timer and Delay Relay

Programmable 35238-MP Timer Module? How to Use it

Last Updated on April 19, 2025 by Swagatam 5 Comments

So this 35238-MP Multi-Function Timer module is an digital adjustable programmable timer which we can use it for doing time-based automation things. Inside it, there is a microprocessor that watches time very closely and makes the relay turn ON or OFF after a set time. So this thing is good when we want to turn […]

Filed Under: Timer and Delay Relay Tagged With: 35238, Module, MP, Programmable, Timer

How to Connect 5V Single Channel Relay Module

Last Updated on February 23, 2025 by Swagatam Leave a Comment

In this post we are talking about this handy little gadget called a 5V single-channel relay module. It is super useful for our microcontroller projects whether we are using Arduino, Raspberry Pi, or even the ESP8266/ESP32. Let us break it down together, what it is, how it works, and how we can connect it. Understanding […]

Filed Under: Timer and Delay Relay Tagged With: Channel, Connect, Module, Relay, Single

Convert any Existing AC Lamp into Timer Controlled Lamp

Last Updated on June 22, 2023 by Swagatam Leave a Comment

converting any lamp into a timer controlled lamp

The proposed push button timer circuit module can be directly integrated with any existing switch contacts of a lamp and enable the lamp to be converted into a timer controlled lamp. A common problem arises whenever one wants to replace a mains AC lamp controlled by a switch with a timer or a time switch. […]

Filed Under: Timer and Delay Relay Tagged With: AC, Controlled, Convert, Existing, Lamp, Timer

Delay OFF Lamp Timer Circuit

Last Updated on November 25, 2023 by Swagatam Leave a Comment

delay off lamp timer circuit

This delay off lamp timer circuit will automatically switch OFF a connected lamp after a predetermined time has elapsed. This time delay can be adjusted with a variable resistor or a potentiometer. The circuit is initiated by pressing a push button, which causes the connected lamp to switch ON. The lamp will continue to remain […]

Filed Under: Timer and Delay Relay Tagged With: Delay, Lamp, OFF, Timer

Make this Drag Race Timer Circuit

Last Updated on November 27, 2021 by Swagatam 8 Comments

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In this post we are going to build a drag race timer circuit using a 7 segment display and commonly available discrete components which can measure the time taken for a car or any other vehicle from start line to finish line. The proposed circuit is fully automatic, meaning it can start and stop the […]

Filed Under: Timer and Delay Relay Tagged With: Drag, Race, Timer

Cellphone Controlled Plant Watering Circuit

Last Updated on July 23, 2022 by Swagatam 3 Comments

cellphone activated plant watering system compressed

In this article I have explained a couple of circuits that will allow automatic watering of plants and flower pots, even while the owner of the house is away from home, and the house is locked for many days. The first method is through a sound activated system which detects the sound from a cellphone […]

Filed Under: Timer and Delay Relay Tagged With: Cellphone, Controlled, Plant, Watering

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