- Electronics Projects
- 1.5v to 220v AC simple inverter
- Build Simple AM Radio receiver at home
- Simple Uninterruptible Power Supply (UPS) Circuits
- Single Transistor Amplifier Circuit
- 3.7v Lithium Battery Level Indicator
- LED Chaser using transistors
- Electronics Projects for Beginners
- Simple Latch Circuit Using Transistors
- DC to AC Power Converter circuit feature working
- Fire Alarm Circuit using Transistor
- Two Transistor Amplifier
- Laser Security System
- Music Operating Dancing LEDs light
- Volts Booster Circuit Using Ferrite ore transformer
- Touch switch circuit using Transistor
- Two transistor FM transmitter project
- LED Flasher Using Timer IC 555
- DC Voltage Power Supply Using The LM317
- Electronic Mosquito Repellent Circuit
- Light Dimmer Circuit 1000 Watts Using BT139
- Non-Contact Voltage Detector by using transistor
- 4 volts simple inverter project: explanation
- Flashing Police Lights Circuit
- Light Dependent Resistor, its types and applications
- 100 watts inverter circuit working and applications
- Stereo Audio Amplifier 5W Circuit using TEA 2025 IC
- Small High Volts using 2Sc 1815 transistor
- Electronic Doorbell Circuit using a 555 and CD4017
- Touch On Touch Off Switch Circuit Using 555 timer
- LM386 Audio Amplifier Circuit
- IC 4440 Amplifier Circuit
- Neon Lamp Circuits Working and Application
- Low Power Audio Amplifier Using integrated circuit
- Voltage Regulator Circuits using Transistor and Zener Diode
- Water Level Indicator Circuit Using Transistor
- LED Chaser using CD4017 IC
- Motion Sensor Light Switch
- Melody Generator Using IC um66
- Water Level Indicator Using IC
- Led Light to 220v AC
- LiFi Data Transfer System, WiFi vs LiFi
- How to Connect a CAR Battery | Polarity Checker
- Voltage Level Indicator Circuit
- Security Alarm Using PIR Sensor
- Battery Level Indicator Using LM 3914
- Single Transistor FM Transmitter circuit
- Different types of Capacitor
- Light Emitting Diode (LED) Types of LEDs
- Different Types of Relays
- Piezo buzzer features equivalent
- Clap Switch : Circuit and Its Working
- Different Types of diode, working and features
- PC817 Optocoupler Pinout, Equivalent, Features and applications
DC Voltage Power Supply Using The LM317
DC Voltage Power Supply Commonly use a fixed voltage regulator when we have to fix voltage for any circuit. Many times we need a variable voltage power supply to control the voltages according to our choice and here we needed a variable voltage power supply. LM 317 is the best choice for this purpose, Drawback of lm 317 is that it can control and can be used in very low amperes, In this article, I will clarify how someone can someone make a power full DC variable power supply with the use of the addition of one more transistor.
DC Voltage Power Supply Using The LM317
The LM317 is a fully adjustable positive voltage regulator that can control 1.5 amps with an output voltage from 1.25 volts to 30 volts. By using the ratio of two resistances one of a fixed value and the other variable or both fixed,.we can set the output voltage to our desired level. Total input can be given to this regulator from 3 to 30 volts DC.
LM 317 Regulator For DC Voltage Power Supply
It is a type of positive-linear-voltage regulator used for voltage regulation, designed by Robert C in 1976 while he worked at National Semiconductor.
It is a three-terminal-adjustable-voltage regulator and is easy to use Because it has only three terminals to use. It is majorly used for local and on-card regulation. If we use fix resistors with this regulator then it can also be used as fixed output like 7805,7806,78XX and so on,
Variable DC Supply using 2n3055 transistor
The above-given circuit can control 1.5 amps of DC current but sometimes we have to control more amps to control our DC appliances. To control powerful appliances we must have to use a powerful power supply so now we convert our supply to a power supply with the help of another transistor 2n3055, It can control 15 amps of DC current ranging from 6094a5c.
An alternative circuit is shown above for an adjustable power supply with LM317 and parallel-connected NPN power transistors. It can control 15 Amps according to my knowledge and if someone needed more amps then another circuit design is also given below.
This circuit shares a double amp and that is why you can control more amps with this circuit anyhow if u find any mistakes in this circuit then please share your knowledge with me I will be great full to you.
I made the first circuit with one transistor (2n3055) that works very perfectly but when I used it with two transistors it did not work. what is the problem I did not understand if any expert read my post plz must guide me and my viewers with an explanation.
