Summary of PIC microcontroller power supply circuit by Chayapol
This article describes a simple 5V portable power supply built for PIC microcontroller experiments using a 7805 regulator powered by six 1.5V AA batteries (9V). It explains the circuit, component roles, soldering on a prototype PCB, testing (measured 4.95V output), and final assembly into a box with a labeled enclosure, encouraging hands-on learning.Parts used in the PIC microcontroller power supply circuit:
- 6 x 1.5V AA batteries (in series)
- S1 : On-Off switch
- F1 : 0.4A 50V fuse
- IC1 : 7805 5V voltage regulator
- LED1 : Power-on indicator LED
- R1 : Current limiting resistor for LED
- C 100uF 16V electrolytic capacitor (input filter)
- C 10uF 16V electrolytic capacitor (output filter)
- C 0.1uF 50V ceramic capacitor (noise/ripple suppression)
- DIY Prototype Paper PCB Universal Board
- Project enclosure/box
- Soldering tools and wire
This is 5V portable power supply circuit for pic microcontroller experiments.
or PIC microcontroller power supply circuit.
As The PIC16F627A microcontroller use 5 volts DC power supply. My son need to build it as 5V portable power supply circuit, because of the need for safe and convenient use in all locations.
How it works
I want my son to embarked on building this projects by himself. So choose a simple circuit. as Figure 1. We use IC-7805 5 voltage DC regulator IC, which has been very popular.
Figure 1 the circuit diagram of the PIC microcontroller power supply circuit
We use the power supply input is 6 x 1.5V AA battery, Are connected in series The total voltage 9V. We used a conventional battery. It’s easy and cheap to buy.
9V to 5V DC converter circuit
S1 : switch to turn on-off this circuit.
F1 : Fuse is used to protect this circuit from overload output. We use 0.4A 50V only to safe all circuit.
IC1 : convert input voltage from 9V to 5V and the ability to maintain the regulated supply
LED1 : for show power on
R1 : reduce current flow to LED1 in safe value
C-100uF 16V : to filter current to smooth
C-10uF 16V : to filter output current to smooth
C-0.1uF 50V : to reduce noise as ripple voltage on high spike
Then I tech myson understand all components using on this project. As Figure 2 he draw them on his note book.
Figure 2 all components that we use
How to builds
Next step He solder parts on DIY Prototype Paper PCB Universal Board as Figure 3
Figure 3 To solder parts on DIY Prototype Paper PCB Universal Board
We tried to cut leg of parts with the nail of my wife. As it’s small, easy to use. And very cheap as Figure 4.
Then, we apply 9V power supply to the circuit, and measure voltage output is 4.95V it is ok.
Next, I assemble the circuit in the Box as Figure 5, it look is great, this step I help my son build it because it is hard for him.
He draw text on the box to clear to use.
For more detail: PIC microcontroller power supply circuit by Chayapol
Quick Solutions to Questions related to the PIC microcontroller power supply circuit:
- What is the input power source for this portable 5V supply?
The input is six 1.5V AA batteries connected in series to provide about 9V. - Which regulator IC is used to get 5V output?
The circuit uses the 7805 5V voltage regulator IC. - What fuse rating is used to protect the circuit?
A 0.4A 50V fuse is used for overload protection. - How are spikes and ripple reduced in the circuit?
A 0.1uF 50V capacitor is used to reduce noise and ripple voltage spikes. - Which capacitors are used for smoothing input and output?
A 100uF 16V capacitor filters the input and a 10uF 16V capacitor filters the output. - How is the LED protected from excessive current?
A current limiting resistor R1 is placed in series with LED1 to reduce current to a safe value. - Where are the components soldered for assembly?
Components are soldered onto a DIY prototype paper PCB universal board. - What is the measured output voltage after assembly?
The measured output voltage is 4.95V. - Is the final assembly placed in an enclosure?
Yes, the assembled circuit is placed and labeled in a box for convenience and clarity.
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Ibrar Ayyub
I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough...