DIY - Arduino Projects

[arduino-diy]

ESP32 C3 Super Mini WiFi Fix - 3 Methods That Work Is your ESP32 C3 Super Mini randomly dropping off WiFi or losing Bluetooth? You're not alone — and here are 3 methods that actually work. fixes I've tested personally.

[arduino-diy]

Hello everyone, today I'll be unboxing and showcasing the FNIRSI DPS-150, a lightweight, high-performance, programmable, digital DC power supply with adjustable output, which you can pick up for an incredibly great price. The unit features a Type-C input and multiple power supply modes, allowing precise adjustment of voltage from 0 to 30V and current from 0 to 5A. Inside the box, you'll find the main unit, two alligator clip leads with banana plugs, a USB-A to Micro USB power cable, and a user manual. On top of that, the device comes with plenty of smart features that you're sure to love.  

Is this the best budget lab power supply? Video: https://youtu.be/xa1ZhUgL_6Y AliExpress: https://s.click.aliexpress.com/e/_c3EPIPtP

[arduino-diy]

Summer has been relentless this year. My passion for Bitcoin mining took a major hit due to the immense heat from my miners and the electricity costs required to keep them cool and running. There were times when the miners overheated so badly that I had to shut them down "manually" to prevent a fire hazard. To automate the shutdown and restart process and to enable remote temperature monitoring, I built an RGB thermometer with its own web interface that can control home appliances based on temperature changes.

Watch this video, for detailed step by step instructions on how to build this circuit and to know how this circuit works.

[arduino-diy]

G'day everyone, today I’ll be unboxing and showcasing FNIRSI’s SAG55 a premium, intelligent 550W hot air gun that you can pick up for an incredibly great price. This thing is an absolute game changer. It heats up amazingly fast and is the perfect tool for de-soldering and heat shrink tubing.

[arduino-diy]

All About PC817 Optocoupler

An Optocoupler also known as Photocoupler or Optical Isolator is a component that transfers electrical signals between two isolated circuits using light. It physically and electrically separates a low-voltage control circuit (like a microcontroller) from a high-voltage or noisy power circuit (like a motor or AC mains). It is basically a solid-state relay that optically interconnects two electrically isolated circuits.

In this tutorial, I am going to talk about the PC817 Optocoupler which is one of the most common and inexpensive 4-pin optocouplers.

Video: https://www.youtube.com/watch?v=Rj9H0beMQq8 Blog: https://diyfactory007.blogspot.com/2025/12/blog-post.html

[arduino-diy]

Make Your Own 3D Printed Diwali Diyas at Home

Diyas are the heart of major Indian festivals, most notably Diwali, the "Festival of Lights." Lighting rows of diyas during Diwali symbolizes the victory of Lord Rama over Ravana and the welcoming of prosperity and Godess Lakshmi (the goddess of wealth).

Tired of oily Diyas? In this tutorial, I will show you guys how I created these super simple 3D printed Diwali Diyas which are safe, non greasy, reusable, easy to make and will last forever.

Video: https://youtu.be/zoYjwL6cUcs

[arduino-diy]

A Color Adjustable Minecraft Lantern

For this Halloween, I'm fusing the creative blocky world of Minecraft with the spooky glow of the colorful RGB LEDs in a fun and simple Halloween project.

A "Color Adjustable Minecraft Lantern" is a project that recreates the iconic lantern from the video game Minecraft. It allows the user to change the light's color to any hue, rather than being limited to the standard yellow or orange glow.

Video: https://www.youtube.com/watch?v=8wauoKaCeak

[arduino-diy]

ESP32 Based Parking Assistant V3 - YouTube

The ESP32-C3 Based Parking Assistant is an advanced parking sensor system that utilizes the ESP32-C3 super-mini micro-controller to provide accurate distance measurements and parking assistance. This is the third iteration of my previously released parking assistant videos. This parking assistant system uses ultrasonic sensors to help drivers park their vehicles accurately by providing visual and audible feedback about distance to the obstacles.

[arduino-diy]

3D Printed Breathing IC555 LED Trophy

This video details how to create a "Mortal Kombat" trophy using a custom 3D printed shell and a NE555 IC timer circuit. This circuit creates a smooth breathing LED effect, mimicking a gentle pulse of living light. Watch for step-by-step instructions to build this circuit and blend retro gaming charm with modern electronics.

[arduino-diy]

Rechargeable 3D Printed Humidifier

Humidifiers add moisture to the air. They can help people with dry skin, allergies, and respiratory problems. They may also help in preventing influenza and reduce snoring. I bought this AU$2 USB Mini Humidifier DIY Kit from AliExpress and went ahead and created a cute little 3D container for it. In this tutorial, I will show you guys how I designed and assembled the humidifier circuit into the 3D model.

[arduino-diy]

4x4x4 PCB LED CUBE

Bring life to your home with this enchanting 4x4x4 LED cube. From static to flashing, chasing, or fading this cube can be programmed to display many different types of 3D LED transitions. This customizable PCB LED cube is super easy to make and fun to have in your home. Go ahead and create a forest of these cubes using various color LEDs to enhance the beauty of your Christmas Tree this Christmas. This cube has 64 Blue LEDs organized in 4 layers. These LEDs are wired up to an Arduino Nano. Each LED can be addressed individually using Arduino IDE, enabling it to display amazing 3D transitions! There are hundreds of tutorials of these cubes made using exposed metal wires and by using crazy soldering techniques, which just gives me shivers. In this tutorial I'll show you guys how to make this super simple 4x4x4 PCB LED cube "without over complicating anything". With just basic soldering skills, you can create this PCB cube and light up your living room making everyone jealous.

[arduino-diy]

ESP Terminal with 3.5" SPI Capacitive Touch Display

Product Info: https://www.elecrow.com/wiki/esp-terminal-with-35inch-spi-capacitive-touch-display.html Elecrow sent me this cute little 320x480 ESP32-S3 based SPI capacitive touch display with OV2640 camera. I am going to use this screen to create a touch panel for my home automation system. In this video, I am going to unbox and show you guys how to program and use this cute little touchscreen from Elecrow using SqareLine Studio. You can order this touch screen display from www.elecrow.com. The product link is in the description below.

[arduino-diy]

Destiny Internet Ghost - Internet NotifierThe Internet has changed the way we live our lives. From communication, education, banking, entertainment and shopping, the Internet has had a profound impact on our world.Gone are the days when the pen was the most important tool in this world. times have changed and now the internet rules the world.It is very difficult to imagine our world without the Internet.In the year 2021 I created a "Internet Hardware WatchDog" using NodeMCU which reboots my home router whenever there is an issue with the Internet. This device sits next to my router and happily takes care of it whenever it has a hiccup.This year, I wanted to extend the watchdogs horizon by adding an "Internet Status Notifier" that displays the current status of the Internet using an RGB LED.When the Internet is up and running, the notifier displays a blue light and when the Internet is down it goes red. Video:  https://youtu.be/mWDEx0khpWM

[arduino-diy]

Liquid Level Indicator Using ULN2003

A water level indicator detects and indicates the level of water in an overhead tank and relays the information back to a control panel to indicate whether the tank has a high or low water level. In this tutorial, I am going to use the ULN2003 IC to create a simple, inexpensive water level indicator. Using this circuit you can easily control the wastage of water and electricity. Watch this video, for detailed step by step instructions on how to build this circuit and to know how this circuit works. Towards the end of the video I will also discuss whether its really worth building this circuit.

[arduino-diy]

All About IC UNL2003

The UNL2003 IC contains 7 High Voltage, High Current NPN Darlington Transistor Arrays each rated at 50V, 500mA in a 16-pin DIP package. You can connect the IC directly to a digital logic (like Arduino or Raspberry Pi, TTL or 5V CMOS device) without an external dropping resistor. This IC features "common-cathode flyback diodes" for switching inductive loads. The ULN2003 is known for its high current and high voltage capacity.

The Darlington pairs can be "paralleled" for higher current Output. The inputs are capable with TTL and 5v CMOS logic.

Now, let's deep-dive and check out the internals of the ULN2003 IC and how it can be used in our projects.

[arduino-diy]

NodeMCU Based: 3D Printed Indoor Gauge Thermometer

Had some time this weekend and a desire to create something new and interesting, so went ahead and created an Arduino/NodeMCU based indoor dial thermometer. This device displays the temperature in degree centigrade on a D-Shaped Gauge as well as on a 7-Segment display.

In addition to that, it also saves the temperature and humidity readings in a MySQL DataBase hosted on a home based Raspberry Pi Server. The data is then displayed using the "Our Smart Home" app.

[arduino-diy]

3D Printed Rechargeable Gothic Lantern

A Gothic Lantern is a captivating piece of lighting that brings the allure of the Victorian Era into your home. The lantern is adorned with ornate top and bottom ornaments, reminiscent of the Gothic style that was prevalent during the Victorian Era. My curiosity to create something new and interesting got me into this gothic style rechargeable lantern. The design is both nostalgic and timeless, making the Gothic Lantern a perfect fit for homes that cherish a touch of historical charm.

Read this tutorial for detailed step by step instructions on how to build this lantern and for a complete instruction on how the electronic circuit works inside the lantern.