Category: power supply

Arduino Controlled Variable Power Supply

Engineeering Projects
arduino controlled variable power supply circuit

We all know that the power supply is the most basic unit of any electric/electronics circuit. The mostly electronic project, we have seen SLA batteries are often used, but they drain and we cannot get all-day performance. It is better to use the battery for backup rather than the main power supply. Another problem with using the battery is, when we draw high current constantly it becomes hot, it might create some serious issue, don’t think about this care? Don’t worry, the circuit Arduino Controlled Variable Power Supply is designed…

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High Low Voltage Cutout Circuit

Engineeering Projects
high low voltage cutout circuit

The protection of electrical and electronic appliances is the main concern these days. Some electronics appliance is very sensitive to voltage i.e. it only functions when adequate voltage is provided. Some appliances were even destroyed due to high and low voltage supply. To solve this type of issue we are posting a very simpler and more useful project called “High Low Voltage Cutout Circuit”. Previously we had already posted various types of appliance protecting circuits on bestengineeringprojects.com like: Auto Cut Circuit for Over and Under Voltage High Current Regulator Circuit…

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Automatic battery float charger circuit

Engineeering Projects
automatic float charging circuit

Automatic battery float charger circuit: This article aims to develop a battery charger circuit using the principle float charging technique. Afloat charger is also referred to as a smart charger, maintenance charger, or storage charger because it charges the battery at the same rate at which it self-discharges. The main reason for using a float charger is, that it protects the battery from overcharging and deep discharging. Thus, you can connect the float charger circuit to a battery for indefinite intervals of time i.e. there is no need to disconnect…

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Offline UPS Circuit

Engineeering Projects
inverter section and changeover section

Introduction to Offline UPS Circuit We all know that most electrical and electronic appliances are solely powered by the AC supply and the problem arises when the power is cut off in the middle or there is no power at all. In such cases, uninterrupted supplies are what we look out for. This is one of those uninterrupted power supply circuits. The fact that it provides an instant power supply from the batteries than standby generators that take long to operate, makes it more practical. To make the use of…

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3.7V to 5V, 5.3V and 6V Converter Circuit

Engineeering Projects
3.7v to 5v converter circuit

3.7V to 5V, 5.3V, and 6V Converter Circuit: The preferred voltage levels while working in most electronics projects lie between the value 5V to 6V. However, 3.6V-3.7V batteries are found abundantly in the market with a cheap price tag. So, we presented an economic solution to generate commonly used operating voltages i.e. 5V, 5.3V, and 6V using these cheap and easily available 3.6V and 3.7V batteries. Using two-three batteries of 3.6V (3.6*2=7.2V) and 3.7V (3.7*2=7.4V) doesn’t provide the desired voltage level and thus this project was essential. This DC-to-DC converter…

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3000W Inverter with Inbuilt Charger using AT89C2051

Engineeering Projects
3000W inverter's microcontroler section

The project posted here is a 3000W inverter with the facility like an inbuilt charger, over and under voltage control, temperature control, microcontroller-based, etc. We all know that an inverter is a device that changes DC power into AC power (just opposite of a rectifier). The general-purpose inverter (low or medium power inverter) used in our house converts 12V DC voltage to 220V AC. But the circuit posted here converts 24V DC (two 12V batteries connected in series) to 220V AC. Circuit Description of Microcontroller Based 3000W Inverter with inbuilt…

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12V DC Ballast Circuit

Engineeering Projects
12V DC Ballast

The project “12V DC Ballast” using power transistor 2N3055 is used to glow AC tube light using a DC source. The circuit of DC ballast is a DC-to-AC converter. DC ballast of various capacities (in watts) is already available in markets. The circuit posted here is of 20W capacity i.e. (it can drive a load up to 20 watts). Previously, we had posted Electronic Blast for Tube-light which drives load up to 40W, double the power of 12V DC Blast. Circuit Description of 12V DC Ballast The circuit of 12V DC…

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Automatic Night Lamp Circuit

Engineeering Projects
night light circuit using traic

The project “Automatic Night Lamp Circuit” is very simple and built around four major components i.e. TRIAC, SCR, LDR, and Resistor. The lamp used in this project is a porch light that would turn on automatically in dark (nighttime) and turn off in light (daytime). Circuit Description of Automatic Night Lamp Circuit The circuit of Automatic Night Lamp Circuit is used shown in figure 1. The circuit is very simple and straightforward that anyone has very little knowledge about TRIAC and SCR. Silicon Controlled Rectifier | Automatic Night Lamp SCR…

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Auto Cut Circuit for Over and Under Voltage

Engineeering Projects
auto cut circuit for over/under voltage

The project “Auto Cut Circuit for Over and Under Voltage” is designed to protect electrical and electronic devices from over and under voltage which ensures a long lifespan of this device. An “Auto Cut Circuit for Over and Under Voltage” has been presented here serving multiple purposes for security; under-voltage protection, over-voltage protection, auto reset, auto cut off, and regulation. Circuit Description of Auto Cut Circuit for Over and Under Voltage The circuit diagram of “Auto Cut Circuit for Over and Under Voltage” is shown in figure 1. The entire…

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Wireless Mobile Charger Circuit Diagram

Engineeering Projects
wireless power transfer receiver circuit

Wireless Mobile Charging is one of the trending topics in the field of electronics thus we also decided to build a Wireless Mobile Charger Circuit Diagram using various commonly available components. The project Wireless Mobile Charger Circuit Diagram posted here can deliver 271mA at 5.2V so you charge mobile phones and also can be used to drive low power loads such as LED1 and LED2 as shown in figure 2. Working Principle of Wireless Mobile Charger Circuit Diagram Wireless Mobile Charger uses the inductive coupling principle. In this principle, two…

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