The post explains a simple sound to flashing lamp circuit which can be used for facilitating people with hearing loss, so that they are able to visualize a distant cell phone rings through flashing of a lamp, and immediately understand regarding an incoming call in their cell phone. The following explanation and the circuit design Read More
Indicator Circuits
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Stopwatch Using Arduino with 7 Segment Display
In this post we are going to construct a stopwatch circuit using 7 segment LED display and Arduino. We will be exploring the concepts related to interrupts and display driver ICs which are crucial for understand this project. This project was suggested by Mr Abu-Hafss who is one of the avid reader of this website. Read More
Intruder Position Indicator Security Circuit
The post explains an LED based intruder position indicator circuit which will indicate the position of the burglar throughout the secured corridor as the person tries to sneak past the area.The idea was requested by Mr. Michael. Requesting a Intruder Position Indicator Security Circuit Good morning sir, your articles are nice, well done.sir can this, close Read More
Material Storage Level Controller Circuit
The post discusses a simple material storage level controller circuit which can be used for automatically activating and deactivating a storage filling motor whenever the storage container is filled to its stipulated threshold level. The idea was requested by Mr Sladjan. Laser Beam Controlled Storage Filling Hi Mr Majumdar, I need help with the engine Read More
Transformer Winding Counter Circuit
The post details how to make a simple transformer winding counter circuit using ordinary LEDs and also through an advanced digital display circuit. The idea was requested by one of the dedicated readers of this blog Winding Counter using Reed Switch Hello Swagatam, I want a circuit which counts a number of turns for winding Read More
Battery Full Charge Indicator Circuit using Two Transistors
This little circuit will alert the user regarding a battery reaching its full-charge level (over charge) while it’s being charged, by illuminating an LED. The circuit uses just a couple of transistors as the main active components. Main Feature The main feature of this design is not only its mini design but also its supply Read More