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 […]
±15V Dual Power Supply Circuit using 7815 and 7915 ICs
Like our previous post on dual power supply, here we learn more about a 15V dual power supply circuit for a preamplifier. Many electronic circuits need dual voltage supply, for example: operational amplifier circuits, audio circuits and other analog circuits. These circuits need both positive and negative voltage that is +15V and −15V. So, this […]
Pre Amplifier Power Supply Circuit using IC 7818 Voltage Regulator
In many audio circuits, clean power supply is very important, especially pre-amplifier circuits need stable and noise free voltage. If supply voltage is not stable then hum and distortion may appear in audio output. Therefore, a regulated power supply is used in this post, as this circuit uses transformer, bridge rectifier, filter capacitors and 7818 […]