Webcam Servo Sweep (v1)
A few weeks ago, while working on another project, someone asked me to build a simple sweeping system for a tiny webcam. I set it aside for the next day and built a webcam servo […]
Resettable PTC (PPTC) Fuse Basics
This post is a quick introduction to resettable PTCs (PPTCs). A polymeric positive temperature coefficient device (PPTC) is a passive electronic component used to protect against overcurrent faults in electronic circuits. Simply put, a PPTC […]
L9110 Fan Motor Module – Quick Look!
The most popular, cheap fan motor module that’s available on Chinese webstores is the L9110 Fan Motor Module. At some webstores you can see this module is listed as a “Fan Module with Propeller and […]
System Voltage Supervisors & DS1232L Micro Monitor Chip
This little post, as the title suggests, shares some random thoughts on system voltage supervisors and related things! Supervisory Circuit Supervisory Circuits are electronic circuits that monitor one or more parameters of systems such as […]
TFT Display & Arduino – A Quick Primer
This post shows how to get started with a quite popular and comparatively cheap color TFT display module with an Arduino Uno. To start this experiment, you need the following key components. Arduino Uno R3 […]
Arduino Analog & PWM – Little Secrets!
As Maya Angelo, an American civil rights activist and poet, once said, Do the best you can until you know better. Then when you know better, do better! So, here’s a review post to keep you […]
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 […]