Category: power supply

The high current regulator circuit can be delivering up to 3-amp load current continuously. The output voltage can be set in the range of 4V to 22V. Fine variation in the output voltage can also be done using a potentiometer VR3. The output current, ranging from 350mA to 3000mA can be varied by potentiometer VR1. Circuit Description of High Current Regulator Circuit The high current regulator circuit given here utilizes all the advantages of the operational amplifier LM3140 (IC1). It has very high input impedance, high gain, high CMRR, low…

Being active users of electrical appliances, we can’t deny the fact that they have almost become our right hand to perform our day-to-day activities. Some of these appliances cost us a heavy amount and when these devices fail to operate or get damaged, we suffer heavy economical loss and in addition to that, we lose our helping hand. To avoid this type of issue faced by most people, we have prepared this low-cost circuit “power protection circuit” which saves our dear electrically operated appliances from situations like sudden tripping and…

The power supply is the basic unit for any electronic circuit and it must be non-destructive. Various types of power supply circuits like stabilized power supply units, Digital control variable power supply units, self switching off power supply units, etc are available on bestengineeringprojects.com. Now, here is another circuit for smooth power supply in the section of power supply-based projects called a Non-destructive power supply circuit using voltage regulator IC 732. Working of the circuit non-destructive power supply-Circuit Most circuits are set to an adjustable “knee” from 2mA to 30mA.…

Mobile phones and small electronic gadgets are powered by AC mains using an AC adapter. In the event of mains failure, a low-capacity UPS will do the job satisfactorily. Here we design a simple, efficient, economical, and easy-to-construct UPS for mobile phone or telephone sets. The project advanced mini-UPS circuit can also be used for high power by changing a transformer with a high current rating so this circuit can be used as power backup for laptops also. We have already posted 350VA Offline UPS Circuit. Block Diagram of Advance…

Many types of emergency light circuits are already available in the web world. Now, here is a unique circuit that glows a fluorescent tube at a voltage as low as 80 volts. This unique circuit Advance Emergency Light Circuit operates at a 12V battery and also charges the battery up to 12V, 15AH at a constant rate. Block Diagram of Advance Emergency Light Circuit The block diagram of the advanced emergency light circuit with charger unit is shown in figure 1. It consists of a power supply for emergency light,…

Various type of power supply circuit from basic regulated power supply to advanced digital control power supply unit is already posted on bestengineeringprojects.com. Now here one more power supply circuit is posted and can be used to provide up to 300mA and voltage between 6V to 13V. Circuit Description of Variable Switching Power Supply The input AC is stepped down using a step-down transformer T1 to 18V AC which is further rectified by a bridge rectifier. The rectified output is filtered by 1000 capacitor C1. The Zener diode ZD1 is…

Various types of power supply circuits like fixed regulated, variable power supply, and stabilized power supply circuits are already published on bestengineeringproject.com. Most of us hear about the universal power supply, it is a power supply unit that provides almost all standard power supply. How’s that if we combine a universal power supply and a digital control technology. Here, the innovative group of Dreamlover Technology designed and verified a universal power supply circuit with the facility of digital control. The unit universal digital power supply provides a variable, fluctuation-free and…