Tricolor Temperature Display
Quite recently I got a stainless-steel vacuum flask with a digital temperature readout integrated on its top lid. When I touch the top of the lid it simply displays the inside temperature of the container […]
Poor man’s Blow Switch
You may often see the musical instrument Melodica on stage shows. From Wikipedia (https://en.wikipedia.org/wiki/Melodica) melodica is a small, light, and portable free-reed instrument similar to the pump organ and harmonica. It has a musical keyboard […]
Home Theatre & A/V Cabinet Cooling Fan Controller
Shoving all your home theatre device into a single cabinet makes sense when you want to keep your living room neat and tidy. But there’s just one (usually overlooked) problem – overheating. Yes, with a […]
Foldback Current Limiting – Little Secrets
Wikipedia says Current Limiting is the practice of imposing a limit on the current that may be delivered to a load to protect the circuit generating or transmitting the current from harmful effects due to […]
USB-C Power Delivery (USB-C PD) – Quick Explainer
USB-C Power Delivery (PD) is a standard that supports up to 100W of power! My first attempt in using a USB-C power adapter as a power source for my breadboard projects was met with great […]
Raspberry Pi Pico Xmas Pixels
Happy Xmas is near, so it’s time to build your own festive lights to surprise your neighbors. In this post, you will learn how to make Christmas special LED pixels with Raspberry Pi Pico! First […]
Arduino LED Signal Wand Light
This is an update to an old project of mine that was printed almost a decade ago! Here is the link to that little nostalgic project https://www.electronicsforu.com/electronics-projects/portable-signal-wand At this point, I’m using a microcontroller as […]
Backpack LED Patch (v2)
After posting the Backpack NeoPixel LED Safety Light project (https://www.codrey.com/arduino-projects/backpack-neopixel-led-safety-light/), I received a lot of requests to publish another do it yourself project based on regular light-emitting diodes, instead of using NeoPixel LEDs. So, I […]
Sound Reactive Pixel LEDs
This little post covers the construction details of sound reactive pixels which is pretty enjoyable to build and watch. You can embed it in a lot of things, for example, think about gluing it in […]
USB Cigarette Lighter Teardown
I was after a cheap windproof electric lighter to use in and around the home. Well, they are cheap enough to buy heaps of them, so I bought a pair of USB cigarette lighters to […]