7805 Voltage regulator Arduino 


In this post, we explain about 7805 voltage regulator for Arduino, which is a regulator circuit used to power the Arduino Nano board.


7805 Voltage regulator Arduino
7805 Voltage regulator Arduino


We know the Arduino boards are capable of providing different voltage ranges from their supply ports, but the only problem we face is the current rating of the power which is provided by the onboard Arduino.

The Arduino is capable of providing 40-60miliamps of current, in some of the applications, the current rating is not enough for the powering.

Here is the importance of the off-board 7805 voltage regulator Arduino.


7805 voltage regulator for powering Arduino 


7805 Voltage regulator Arduino
7805 Voltage regulator Arduino


Normally USB ports and power jacks are used to power the Arduino board, but the current is very low, this circuit will be used as an external element to power up.

The circuit only has three components, such as a 7805 voltage regulator, C1, and C2 capacitor.


At input we have a C1 0.33uf ceramic capacitor for dealing with input impedance and a C2 capacitor at the output is for add the stability of the circuit.


One of the conditions is, both these capacitors should be placed closer to the terminals of 7805, because of the work effectively.


A ceramic capacitor can be recommended due to the faster operation of ceramic than electrolytic type.


Applications of 7805 voltage regulator 


This 7805 voltage regulator Arduino project has two options of operation in the Arduino, one is to provide power as an external power supply, but the limitation is the current rating of the 7805 voltage regulator, it is around 1-1.5amp.


And next option is to power up external devices such as relays, motors, servos, or heating elements from the board pins. 


They need to be feed from a more powerful source, Arduino onboard is not capable of this operation. 

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