A stable power supply is the backbone of every electronic circuit and without proper voltage, even the best circuit cannot work correctly, however, transformer output is also not stable and it also contains ripple. Therefore, this circuit uses voltage regulator ICs, the 7805 regulator normally gives fixed +5V output and similarly the 7905 regulator gives […]
7805 Adjustable Power Supply Circuit
Electronic devices need controlled voltage to work safely and therefore, we use a regulated power supply. However, AC mains voltage is not stable, so it is also not suitable for small electronic circuits, because of this we need to use voltage regulator circuits. The 7805 regulator IC is a popular device which normally gives fixed […]
LM338 Adjustable Power Supply 5A Circuit
During electronics testing we often need variable voltage as fixed power supplies are not always suitable, but our mains electricity is AC and therefore, we must convert AC to DC before using it. Also many projects need different voltages, like sometimes 5V or sometimes 12V or more. For this reason adjustable power supplies are very […]
LM350 Based 0-12V 3A Variable Power Supply Circuit
A variable power supply is very useful in electronics lab, as it helps to test many circuits and also it allows changing voltage easily. In this project, a 0V to 12V adjustable power supply is designed, the circuit uses LM350 adjustable voltage regulator and this regulator can supply up to 3A current. First, the AC […]
15V Dual Power Supply Circuit for Preamplifier
A dual power supply is very important for audio circuits, specially for preamplifiers and operational amplifiers, as these circuits need both positive voltage and negative voltage. In many audio designs +15V and -15V power rails are commonly used, because they give clean signal amplification and low distortion. This project for 15V Dual Power Supply Circuit […]
Transistor Based ±15V Dual Power Supply Circuit
Electronic circuits cannot function without a proper power supply and a good power supply ensures stable and reliable circuit performance. Power supply is one of the most important sections in any electronic system and many electronic circuits need both positive and negative voltage, for example, operational amplifier circuits, audio circuits and analog circuits need dual […]