The power supply is the mainstay for every electronic device. As the name suggests power supply are power providers for any circuit. Every electronic circuitry needs a proper power supply at the input for its optimum result at the output. We need to choose the power supply of any device or circuit as per the power requirements of the device. In this experiment, we are making an adjustable power supply, which will give voltage in the range of +/- 1.25 V to +/-22V with 1A as maximum current.

顾名思义，电源是任何电路的电源提供商。每个电子电路都需要在输入的输入下进行适当的电源，以便在输出时获得最佳结果。我们需要根据设备的电源要求选择任何设备或电路的电源。在此实验中，我们正在制作可调节的电源，该电源将在0 - 15V的范围内以1A为1A作为最大电流

The major concern in driving the LED is about the constant DC supply at the input of LED. Any unwanted fluctuation in the voltage at the input of LED can damage it. The excess flow of current through LED greater than the LED forward current rating can increase its temperature and this will damage the LED. Therefore the role of constant voltage LED supply is very important in this scenario. In this experiment, a driver circuit is designed which gives a constant voltage of 12V at the output with maximum current of 1A.

顾名思义，电源是任何电路的电源提供商。每个电子电路都需要在输入的输入下进行适当的电源，以便在输出时获得最佳结果。我们需要根据设备的电源要求选择任何设备或电路的电源。In this experiment, we are making an adjustable power supply, which will give voltage in a range of 0 – 30V with 2A as maximum current.

A constant current source is used to provide a constant current regardless of the input voltage and output load. This type of circuit is also used as a current limiter. Every electronics device has some current rating above that rating the device may damage or it will not work properly. Therefore there is a big requirement of the constant current source in electronics. In this experiment, we are designing an adjustable constant current source which supplies 25mA constant current at the output regardless of load resistance and input voltage.