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 […]
Timer
Sequential Timer Circuit using Transistors
In this post I have explained to make a simple sequential timer generator circuit which can be used for getting a sequential triggering of a connected load, or can be simply used like a sequential LED bar graph effect generator, using only transistors. The idea was requested by Mr Babusan. Technical Specifications Is it possible […]
Christmas LED Candle Light Timer Circuit
In this post I have explained a sequentially advancing 25 LED timer circuit which may be initiated on the 1st day of December so that each LED lights up on each day until the 25th of December (on Christmas) when all the 25 LED can be seen lit up. The circuit was requested by Mr. […]
Audible Meditation Timer Circuit
In this post I will show how to construct a timer circuit for meditation practices which gives out beeping sound between 1 and 9 seconds (user selectable) and this beeping audio can be integrated with your mediation session, we will see how we can integrate the periodic beeping with “mindfulness meditation” as example in later […]
LED Timer Indicator Circuit for Board Games
In this article I have explained a simple LED indicator timer circuit which can be used with board games for indicating the elapsed time or the time consumed by the player to complete his or her turn. The idea was requested by Mr. Shane Robins. Technical Specifications Hope all is well with you. I am relatively new […]
Timer Based Cell Phone Charger Circuit
A simple cell phone charger with timer circuit is presented in the following article, which could be used for charging a given Mobile phone for a specified predetermined length of time. The idea was requested by Mr. Saad. Circuit Objectives and Requirements Could you design me this charger circuit ? Input 230V 60 Hz, and the […]