USBx3 Power Bank Module – A Look Inside!
The post was created some time ago and I’m not sure if things have changed, but it worth a shot! Back in January 2020 I picked up one Philips DLP6006B 11000mAh Li-Ion Power Bank on […]
LM336Z-5 Quick Refresher
There are times when it’s astounding to be able to make a programmable shunt regulator, perhaps using obsolete components from your junk box. Recently, I used a modest little circuit to do that thing; the […]
Raspberry Pi Pico & Arduino IDE
The Raspberry Pi Pico is a feature-rich microcontroller! Its low cost and wide availability make it a great microcontroller for our everyday electronics projects. Python and C/C++ are lovely for programming the Raspberry Pi Pico […]
RGB LED Color Mixing & Crossfades – A Quick Primer
When you want beautifully smoother color transitions, a better way to do it is to try HSL or HSV rather than just driving LEDs via RGB colors. So, this little post is about controlling RGB […]
Automatic Shutdown Circuit for Arduino (v1)
Some time ago I had posted a couple of Arduino projects that work in conjunction with external power supply circuits. If you have not already got those ideas yet, you may simply go through the […]
Automatic LED Night-Light Teardown
I bought a cheapo Chinese automatic LED nightlight a while ago. Working on this “automatic color changing night lamp” is pretty simple. A photoresistor (LDR) turns the LEDs on when it sees darkness and off […]
Selfie Stick & Little Secrets!
Selfie Stick is a common smartphone accessory nowadays! The word “selfie” first appeared in an online forum in 2002, and in 2013 it was named the Oxford Dictionary Word of the Year, defined as “A […]
Matchbox Magic Lamp v1
This post is about the construction of a multi-colored matchbox-sized magic lamp for kids using a simple and cheap microcontroller board. The most interesting thing about this build is that it does not require any […]
Soldering Iron Tip Thermometer – Little Secrets!
Whether you are a soldering artist or not, checking your soldering iron out should be a steady routine. So, it’s always good to have a soldering iron tip thermometer handy. There’re different types of tip […]
FOTEK SSRs – Just Another Quick Guide
This little post is about the quite popular FOTEK Solid State Relay (FOTEK SSR). First note that FOTEK is a well-known brand in China and a FOTEK SSR will last a long time. But sadly, […]