Smallest CPU Using Raspberry Pi Zero W || Raspberrypi imager

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In this tutorial we gonna build a portable CPU using raspberry pi zero w.

Raspberry pi zero is not made for heavy processing I have tried youtube video but the video is lagging. Then I tried arduino ide it worked pretty well for me...

So now I can program arduino from this tiny little raspberry pi zero w.

Let's start.....

Step 1: Requirements

• Raspberry pi zero w
• Small Slide switch
• Mini 30x30 cooling fan
• 134N3P module
• 3.7v 1000mAh battery

Note :- the more mAh means more battery backup

Step 2: Connect SD Card

• Take a sd card make sure it is empty
• Put sd card in card reader
• Connect card reader to your pc or laptop

Step 3: Flash Rasbian Image

• Download raspberry pi imager too from here. Or you can download it from my github page.
• Run the imager tool.
• Click on choose button where you can choose any os but in raspberry zero w rasbian 32bit is perfect.
• Click on choose sd card and select your sd card.
• Click on write and then click on yes the writing process stars.

Step 4: Put Sd Card in Pi

• Once image writing is completed it will say to remove your sd card.
• Remove sd card and put it into pi.

Step 5: One Time Setup

• Connect mini hdmi to hdmi adapter as shown in image.
• Connect hdmi cable to the adapter and connect it to tv or monitor.
• Take a OTG hub or you can use single otg like me but you have tp switch mouse and key board when needed.
• Connect power supply which is micro usb cable.
• At start you will see colorful screen as shown in image it will take some time to boot up.

Step 6: Initial Setup

• Once it booted up do initial setup which it ask.
• Select time zone of your country.
• Select us keyboard.

Step 7: Wifi and VNC

• Click on the wifi icon and connect wifi from your mobile Hotspot or same wifi where tour mobile is connected.
• Now go to the left side of screen and click on raspberry pi logo.
• Here click on preferences and then raspberry pi configuration.
• Go to the interfaces option.
• Enable VNC.

Step 8: Ip Address and Vnc App

• Take your cursor on wifi logo you will see ip address.
• Note down the address we will use it in vnc viewer.
• Download vnc viewer apk from play store.

Step 9: Add Pi in VNC Viewer

• Open Vnc viewer and click on add button
• Enter ip address which you seen on wifi ion.
• Now enter name as you want
• Click on create.
• Now click on connect.

Step 10: Enter Username and Password

• Enter username "pi".
• Enter password "raspberry"
• Now you can seen your monitor screen on mobile.
• Now you no need hdmi or keyboard or mouse, just power on wait til it connects to wifi and you can connect it on vnc viewer.

Step 11: Let's Make a Portable Case

• Take the raspberry pi case and remove all number from isopropyl or nail paint removal.

Step 12: Make a Hole for Heat Sink

• Put your raspberry pi inside case.
• Put heatsink right top of raspberry pi processor
• Make a square from marker.
• Cut the square from heating up a sharp object.
• Sand it via sand paper.
• Make hole for fan and also sand it.

Step 13: Preparing 134N3P Module

• Remove USB from module
• Solder 2 wire on B+ and B -
• Solder 2 wire on V and G terminal given in image.
• Fix the module in case, I have made a hole for micro usb port.
• Hot glue not able to fix it on case so I have used both hot glue and super glue.

Step 14: Connect Circuit

• Connect battery at b+ and b- terminal of module.
• B+ is positive red wire and B- negative black wire.
• Connect a wire at V terminal of module and it will be connect to any side terminal of switch.
• Connect middle terminal of switch to the +5v of raspberry pi.
• Connect G terminal of module directly to ground of raspberry pi.

Step 15: Assemble All Things Together

• Assemble all things.
• As you can see I have fixed the fan at top of heat sink.
• I have made a hole for on off switch.
• You can also see the charging port hole.
• The battery is looks small because it is 300mAh but I recommend you to use at least 1000mAh.
• This 300mAh giving me 5-7 min of battery backup.

Step 16: Set the Resolution

When you startup the raspberry pi without screen the resolution of screen is very small so let's set it.

• Open command terminal.
• Type command "sudo nano /boot/config.txt" and hit enter.
• Here you have to uncomment 3 lines

hdmi_force_hotplug = 1

hdmi_group = 2

hdmi_mode = 82

4. As you can see I have changed group to 2 and mode to 82.

5. You can find your mode here.

6. Now press ctrl + x then y and then hit enter.

7. Type sudo reboot in terminal to reboot.

Step 17: Done

Now all done....

You can also use arduino ide in it.

By the way, subscribe to my YouTube channel for more projects like this. I also update my upcoming projects on Instagram.