LM317

Many Analog Electronic circuits require dual power supply rails for proper balanced operation one being the Operational amplifier circuit. Negative supply voltage is also required in digital systems like A/D converters, op-amps, and comparators. In our previous tutorial, we built a +12V and -12V Dual Power Supply Circuit and a +5V and -5V Dual Power Supply Circuit but the…

When developing electronic projects, the power supply is one of the most important part of whole project and there is always need of multiple output voltage power supply. This is because different sensors need different input voltage and current to run efficiently. In this scenario, a power supply which can output multiple voltages becomes very important. There are options…

Just like situations in which we need to regulate the voltage in our designs, there are scenarios where we need to regulate the current that’s being supplied to a particular part of our circuit. Unlike transforming (changing from one voltage level to another), which is usually one of the major reasons for voltage regulation, current regulation is usually about keeping the…

The term Supercapacitors and its possible usage in Electric Vehicles, Smartphone’s and IoT devices are being considered extensively in the recent times, but the idea of super capacitor itself dates back to 1957 when it was first experimented by General Electric to increase the storage capacity of its capacitors. Over the years Super capacitor technology has improved…

The advancement in Electric Vehicles, Drone and other mobile electronics like IoT Devices seems to be promising for the future. One common thing among all these is that they are all powered by batteries. Following Moore’s law the electronic devices tend to become smaller and more potable, these portable devices should have their own source of power to operate. The most…

A Soft Start Circuit prevents the sudden current flow in the circuit during the start. It slows down the rate of rising output voltage by minimizing the excess current flow during the start. It is useful to protect the devices or electronic components from the damage caused by instantaneous high input current. Some components which are current limited and having poor load…

A Power supply unit is a very commonly used tool by most engineers during the development stage. I personally use it a lot when experimenting with my circuit designs on Breadboard or to power up a simple module. Most of the digital circuits or embedded circuits have a standard operating voltage of either 5V or 3.3V, so I decided to build a Power supply which can supply 5V/3.…

Previously we have built many types of charger circuits, that incudes Solar mobile Charger, Float charger circuit, 12v Battery charger, Power bank circuit etc. Today we are going to build charger circuit for charging Ni-Cd Battery. The process of charging Nickel cadmium batteries can be done in two ways:

The Fast…

Whenever we need a constant and specific value of voltage without fluctuation we use voltage regulator IC. They provide a fixed regulated power supply. We have 78XX (7805, 7806, 7812 etc) series voltage regulators for positive power supply and 79XX for negative power supply. But what if need to vary the power supply voltage, so here we have Variable Voltage Regulator IC…

A float charger, also called as maintenance charger or smart charger, is used to charge a lead acid battery to top-up the self-discharge capacity. Self-discharge happens in a battery if not in usage for long time i.e., the terminal voltage begins to decrease. If this float charger is connected to the battery the self-discharged capacity can be topped up which is to full…

High Power LED lights have lots of applications starting from Emergency lights to Head Lights in some expensive cars. These tiny little things illuminates a lot of area that we expect it to be, in this tutorial we will learn how easy it is to use one and how can we design our own circuit to drive such LEDs based in their operating current.

So let us…

Internet of Things and Home Automation has really been a hyped topic in the recent days. Building something on our own which can communicate to the World Wide Web and can be accessed from anywhere in the world, really sounds cool doesn’t it?

But, wait!!! It also sounds complicated???....

So did it for me, I thought it would…