Circuit Ideas for You

In our previous post for ±15V Dual Power Supply Circuit using 7815 and 7915 ICs, now in this post we will generate +15V and −15V using a two terminal AC transformer. The circuit uses rectifier diodes, filter capacitors and voltage regulator ICs, the regulators used are same 7815 for positive voltage and 7915 for negative […]

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 […]

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 […]

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 […]

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 […]