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Lamps and Lights

Automatic Door Lamp Timer Circuit

Last Updated on January 2, 2024 by Swagatam Leave a Comment

automaticdoorlampcircuit

In this article I have explained a simple automatic door light timer circuit which activates every time the door is opened, and switches OFF after a predetermined time if the door is kept open for too long. The circuit was requested by one of the avid readers of this blog, Mr. Juan. I have explained more. Technical Specifications: I always find […]

Filed Under: Lamps and Lights, Timer and Delay Relay Tagged With: Automatic, Door, Lamp, Timer

Using a Fan Dimmer for Controlling LED Intensity

Last Updated on May 17, 2019 by Swagatam 17 Comments

leddimmercircuit

The circuit idea I have I have explained in this article can be used for controlling the intensity of many LEDs  through a ceiling fan dimmer switch unit. This circuit was requested by Mr. Joseph who wanted a simple method through which an ordinary home dimmer switch could be integrated with a chain of LEDs for controlling its brightness from […]

Filed Under: Lamps and Lights Tagged With: Controlling, Dimmer, Intensity, LED

3 Watt, 5 Watt LED DC to DC Constant Current Driver Circuit

Last Updated on January 21, 2022 by Swagatam 152 Comments

3watt5wattleddrivercircuit

The following article provides a simple yet very decent solution for driving powerful LEDs rated at 3 watt or 5 watt. Circuit Objective These 3 watt 5 watt and similar high watt LEDs are able to produce highly intense and powerful light outputs, however these are extremely vulnerable too with their operating parameter. I have […]

Filed Under: Lamps and Lights Tagged With: Constant, Current, DC, Driver, LED, Watt

Converting Ordinary Rice Bulb String Light to LED String Light

Last Updated on September 8, 2020 by Swagatam 12 Comments

In this post we study how to convert a rice bulb string light into an LED string light using some simply circuit modification. Circuit Concept Whether it’s during a  festive occasion or for mere decoration purpose, the Chinese rice bulb flashing lights have become  hugely popular nowadays These can be seen as multiple interlaced wire strings consisting of many different […]

Filed Under: Lamps and Lights Tagged With: Bulb, Converting, Light, Ordinary, Rice, String

Simple PIR LED Lamp Circuit

Last Updated on January 8, 2024 by Swagatam 121 Comments

pir light activated sensor circuit

The following PIR LED lamp circuit was designed by me for one of the followers of this blog Mr.Deepak upon his request. The circuit is a LED driver which responds to ambient light as well as to the presence of a human, person or intruder, and varies its illumination accordingly, let’s know more. Technical Specifications “I was looking to […]

Filed Under: Lamps and Lights Tagged With: Lamp, LED, PIR, Simple

Battery Over Charge Protected Emergency Lamp Circuit

Last Updated on January 2, 2024 by Swagatam 126 Comments

The following LED emergency light with battery over charge protection feature circuit was designed by me in response to the request sent by PP. Main Features In this article I have explained an LED emergency light circuit with advanced features such as, over charge battery cut off, day time auto-disable, and need less to say […]

Filed Under: Lamps and Lights Tagged With: Battery, Charge, Emergency, Lamp, Over, Protected

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