![]() And, If there are overload or short circuit. Inside this IC has short circuit protection and prevents overheating.Īs a result, this circuit can keep the level output voltage as well. It keeps the level of constant voltage of 15V. This 13.8V power supply circuit uses a regulator IC, LM340T-15. Use the size of 5A fuse is a slow, or Slow blow fuse. It saves money and easy.įor example you want 20,000uF you can use 2x 10,000uF. You may use 10,000uF 25V x 6 connect together in parallel. ![]() In 30A output, if you cannot buy a 68,000uF 25V electrolytic capacitor. So, we have a total capacity of 4,700 μF x 5 is 23,500μF. It is enough to use. We may use five of 4,700uF 25V capacitors to connect together in parallel. Equivalent capacitorsīut it may do not for sale. ![]() Suppose You want to build 15A output current. With the output voltage of 13.8V. You can choose a variety of devices as you want, follow these steps.ġ. Suppose that you get a big transformer from your grandfather. So you need the least of 30A transformer. We often use the three-terminal regulator IC likes 78xx, 7812, or 7815.īut It is a big size with large components.įor example, the transformer if you want 30A output current. Because it is popular in the transistor power amplifier.Ī linear power supply circuit is a better choice. Imagine, you have a lot of power transistors, 2N3055. Sometimes you may have these components in your house. So easy to buy in locals stores near us, and cheaper. We want the circuit that uses normal parts. The high current 13.8V power supply circuit Concept of circuit picking Which you may apply by changing the voltage and current as needed. Such as A large DC motor, car audio system, and others. It will very proud.īesides, this power supply circuit is also useful as a wide variety. And when completed, runs in its function. It will be a great time while creating this project. But if you build them with your own or your friends. Of course, you can buy a power supply that simple and effective with a variety of sizes. The output voltage is scheduled using the voltage divider (1K/560) to ensure that 1.7 volts can be ascribed to the 3904 base once the output is 5 volts.Related Posts Why this circuit interesting This exact same current runs via the emitter resistor of the 2N3904 which will create around a 1 volt drop over the 62 ohm resistor as well as 1.7 volts on the base. The LM317 constantly works using a voltage variation of 1.2 between the output and adjustment terminals and demands a minimal load of 10mA, hence a 75 ohm resistor has been picked that will probably bring (1.2/75 = 16mA). The LM317 will supply more than 1 amp of current to push the bases of the external power transistors and with an approximate gain of TEN the combo ought to provide 15 amps or even more. The LM317 takes a few added volts on the input side, as well the emitter/base drop from the 3055s, and also no matter what is shed along the (0.1 ohm) equalling resistors (1volt at 10 amps), therefore a different transformer and rectifier/filter circuit is employed which adds some volts more than the output voltage. To get decent efficiency the voltage with the collectors of the a pair of parallel 2N3055 pass transistors needs to be near to the output voltage.
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