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All About PC817 Optocoupler
Adhikari Dec 18,2025
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 o...
Christmas2025 DIY pc817
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Make Your Own 3D Printed Diwali Diyas at Home
Adhikari Nov 29,2025
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://www.youtube.com/watch?v=zoYjwL6cUcsCompon...
Christmas2025 3D printing DIY
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DELTA Redux - RGB Video card
Battaglia Nov 28,2025
This is one of the two video output boards for the DELTA Redux retrocomputer.It provides analog RGB output compatible with scandoublers and SCART inputs.
Christmas2025 Retro apple
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DELTA Redux - Composite/TV Video card
Battaglia Nov 28,2025
This is one of the two video output boards for the DELTA Redux retrocomputer.It provides VHF output or composite video output in monochrome.Note that the BOM provided for this shared project assembles only the components required for the composite output.
Christmas2025 Retro Apple2
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Christmas gifts 🎁
J Nov 26,2025
I have designed a unique electronic circuit that brings a special and distinctive touch to your Christmas celebrations. This project, carefully developed with the open source tool KiCad, uses high quality SMD components. It features a 0603 size LED that emits a warm festive light, accompanied by a 0805 resistor that optimizes brightness and reduces power consumption.The design includes a CR2032 battery holder, providing a compact, cordless power source, ideal for portable and aesthetic use. It a...
8th Design Contest-Electronic Project LED PCB
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Reno LED PCB Christmas Tree Ornament
Rodrigues Nov 23,2025
Christmas Tree LED Ornament that uses a CR2032 coin cell battery with white LED"s
DIY LED Hardware
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Christmas 🎄
J Nov 22,2025
I have designed a unique electronic circuit that brings a special and distinctive touch to your Christmas celebrations. This project, carefully developed with the open source tool KiCad, uses high quality SMD components. It features a 0603 size LED that emits a warm festive light, accompanied by a 0805 resistor that optimizes brightness and reduces power consumption.The design includes a CR2032 battery holder, providing a compact, cordless power source, ideal for portable and aesthetic use. It a...
8th Design Contest-Electronic Project LED PCB
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Christmas tree
Sparrow Nov 19,2025
Circular Christmas tree 2023(C) Elektor
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LED Christmastree with counter IC 4060
van Dijk Nov 03,2025
With the holiday season just around the corner, I thought it would be fun to create an LED Christmas tree with a counter IC. The PCB is designed to stand upright, supported by a 9V battery that also powers the circuit. I designed the entire layout myself using Sprint-Layout 6.0 software. Once the components are assembled, I’ll be sharing the finished boards with family and friends — and a few will be available for sale. A short demo video below is showing the blinking LED's:YouTube videoclip: ht...
DIY LED IC 4060
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Traditional Incense Cones – Instructions & mold
Torsten Silovsky Apr 20,2025
Materials NeededFor the Mold:- 3D-printed split mold (from this project) Order below- Rubber band or small clamps- Optional: release agent (oil, vaseline, or talcum powder)For the Incense Cones Mixture:- 50 g finely ground charcoal- 7 g ground frankincense- 3 g ground sandalwood- 1 tbsp cornstarch- 20 ml water or moreStep-by-Step Instructions1. Make the Binding Agent:- Mix starch with 2–3 tbsp cold water.- Boil the rest of the water and stir in the starch mix.- Simmer until gel-like, then cool.2...
3D printing Räucherkerzchen Christmas
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A Modified zFlip 5
With many Samsung zFlip phones hitting the unfortunate fate of a broken folding screen, I took it as an opportunity to build my own silly phone. Taking only the minimum parts required for the phone to...
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