Simple Power Supply Circuit is a must-have on an electronic device. Power supply circuit has the main function to supply voltage for other circuit. In electronic appliances such as TV, Computer, DVD or others need power supply. Power supply is also very needed for you who hobby in the field of electronics. To conduct experiments to make electronic circuits, surely need a power supply as a voltage source. Actually a lot of power supply is also sold in the market in a ready-made form. But maybe the price is somewhat expensive for you. Well, therefore in this tutorial I will discuss the topic about making a simple power supply circuit that you can practice at home. Make sure you understand basic about electronics if you want to practice how to make this power supply circuit.
Parts In Power Supply Circuit:
- Voltage Reduction (Step Down)
- Rectifier Circuits
- Filter Range
- Voltage Stabilizer Circuit (Regulator)
Voltage circuit is a circuit that serves to reduce the AC voltage from 220 volts to a lower voltage. As you know, the power voltage in our house is 220 volts AC. To make the power supply circuit, 220 volt AC voltage must be lowered first so that the voltage becomes lower. The voltage drop can use step-down transformer.
Rectifier circuit or commonly called a rectifier circuit, is a circuit that serves to make the AC voltage (back and forth) into DC voltage (unidirectional). This circuit uses a combination of several diodes. There are 2 types of rectifier circuit that can be used to make power supply. Among others are as follows:
- Half Wave Rectifier
- Full Wave Rectifier With 2 Diodes
- Fullwave Waveguide With Diode Bridge
Voltage stabilizer circuit or commonly referred to as a series of regulators, is a circuit that serves to stabilize the voltage at a certain value. This circuit usually uses a special IC regulator. There are 2 types of regulator ICs that are usually sold in the market that is Linear Regulator and Switching Regulator.
Linear regulators are widely used to make simple power supply circuits. Because this type of regulator pretty much sold in the market. This linear IC regulator is usually glowing 78XX or 79XX. Where XX is the regulator output voltage. Example if the desired power supply with output voltage of 5 volts then linear IC regulator used is 7805. If desired is a power supply with 12 volt output voltage, then used is IC regulator 7812.
Image Simple Power Supply Circuit:
The power supply circuit above uses a step down transformer type zero transformer. While the rectifier circuit uses a full wave rectifier type with H-bridge. Then as filter circuit used electrolytic capacitor with value 1000uF and 1uF. For the regulator is used IC type 7812, so the output of simple power supply circuit above is 12 volt with the ability to supply current of 1 ampere. The above circuit you can make at home with plain PCB or PCB holes, so it can be used as a power supply for your experiment!