Most of the electronic circuits need regulated 5V DC supply to work fine. Buying a 5V DC power supplies very costly. So in this article, I am sharing the simple Circuit to build a 5v DC power supply using 7805 voltage regulator IC. This voltage regulator IC can provide 5V DC with 1A current. The LM7805 regulator IC comes with three pins.
The three pins are voltage in (Pin) ground pin and output pin if you providing a volt DC or 18 V DC to the input of this voltage regulator IC. It will convert the input voltage into a stable 5V DC voltage. Most of the micro controller and sensors need a stable 5V DC supply, so I suggest you to build your own DC power supply, the circuit diagram and the explanation are given here.
7805 Voltage Regulator
The LM7805 voltage regulator IC is most commonly used in Audio amplifier circuit to powering the Bluetooth module or remote control boards. This is a positive voltage regulator IC the model of 7805 means the 5V fixed output regulator. The input voltage range is between 7V to 35V. The recommended input volt is 7V to 25V. The IC can deliver up to 1A continuous current. The dropout voltage is around 2V that means it needs at least 7V input to get output 5V.
Why Use a 7805 for a 5V Power Supply?
The 7805 voltage regulator IC is most popular and linear regulator used to giving a stable 5V DC output. This regulator IC based circuit are very simple and it will avoiding more complex circuits. Some of the key features of this IC is, which is purposefully designed for a fixed at 5 V output, which is ideal for powering the micro controller sensors, LED and other 5V electronic devices and circuits.
With the three pins of 7805, The user can easily assembled in a tiny PCB or you can mount on a breadboard. No programming or complex set up is required to build a power supply circuit, so it is a very beginner friendly type of IC.
The 7805 voltage regulator IC widely available , you can buy this from any electronic component sales shop or Online components sales website in a cheap cost.
This IC provides additional protection features such as thermal shutdown, short circuit and current limiting to safeguard the Circuit from further damaging. The IC can deliver up to 1A, so it is suitable for low power applications such as Arduino, ESP8266 and other Sensor circuits.
7805 Pinout
Pinout Configuration
| Pin Number | Pin Name | Function |
|---|---|---|
| 1 | IN | Input voltage (typically 7V to 35V) |
| 2 | GND | Ground (common reference) |
| 3 | OUT | Regulated 5V output |
Circuit Diagram
