Nowadays minuscule 433MHz RF modules are used in a wide variety of applications that require wireless control, and are very popular among the tinkerers because these modules are very cheap and can be interfaced easily with almost all microcontrollers. I have for some time wanted to hack my RF Remote Control Light Switch I bought… [Read More]
What is GPS and How does it work?
Introduction Have you ever thought of locating yourself on the blue planet (Earth)? This might be a tough question if you are residing in a new place. But don’t worry, the answer is simple, the GPS. GPS is a tiny device used as a navigation receiver in ships, and aviator, smartphones and many more. In… [Read More]
Ohms Law – Heat and Power
Every electronic and electrical appliance in this world runs with power. When this happens, some energy is dissipated in the form of Heat. Whereas the Power is the flow of voltage and current in a conductor or semiconductor. As you know conductor is a material that allows the flow of electrons when an electric field… [Read More]
Ohms Law Basics – Voltage, Current and Resistance
In the previous tutorial, we had discussed the applications of current, voltage, and importance of Coulomb’s law in electricity. But, without ohms law the operation of an electric circuit becomes incomplete. To fulfill this, Ohms Law is also involved. A German physicist Georg Simon Ohm discovered the ohms law and found the relationship between current,… [Read More]
Examples of Conductor and Insulator with Applications
There are many types of conductor and insulator used in electrical and electronic circuits. Substances covered with metal shields are the electrical conductors. In a conductor, electric current flows in the form of negatively charged electrons. Whereas insulator is a material suitable for preventing the flow of electricity. They bypass or store charge and the… [Read More]
Conductor and Insulator
Electricity travels through different materials like copper. But have you ever thought how metals conduct electricity? Do all metals conduct electricity and why? In this tutorial, you will know the different types of conductor and insulator and their electrical properties. Electronic devices and components are made up of conductor, semiconductor or insulator. The energy level… [Read More]
Secure Water Pump Switch
Here is the circuit diagram of an independent water pump switch controller with ‘soft’ on/off buttons. Since the circuit uses low-voltage switches, even a kid can operate it safely. Besides, there’s also a dry-run protection option to disable the water pump controller if the water level at the sump/underground storage tank goes below a certain… [Read More]
Safe Bathroom Lamp Controller
As you may know, bathroom is possibly the most dangerous area in your house when it comes to electrical safety because water is a sound electrical conductor. The consequence of an electric shock is far more severe in the bathroom because your wet skin reduces the body’s resistance and the effect is very dangerous. Here… [Read More]
Electronic Magnet Evaluator
Electronic Magnet Evaluator is a simple device incredibly useful for experimenters and students. With this little gadget one can not only detect the presence of a permanent magnet but also find out its south (S) and north (N) poles. Circuit of this portable device is designed for 9V battery operation. The circuit given below uses… [Read More]
Security System with Voice Playback
This circuit is designed in response to a request made by my beautiful neighbor. What she desired was an inexpensive device to record and replay customized voice messages. Now it’s the frontend of her simple burglar deterrent alarm gear. The battery-operated circuit comprises of two equally important parts – a digital rec/play module (ISD1820) and… [Read More]
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