Tricolor LED Signal Baton
An LED signal baton (also called marshalling torch) is a proven gadget to head traffic. Primarily it is widely used by traffic police, attendants etc. to channelize traffic but it is a great handy aid […]
Automatic Aroma Diffuser (v2)
Last week the prime goal was to revise my design thoughts on automatic aroma diffuser and make a bit amended version for a distant client, again using a bunch of readily available inexpensive components. I […]
Photosensitive Hobby Servo
There are many ways to use standard hobby servos in do it yourself projects. I semi-regularly hear about design concepts that I’m not familiar with. Recently, I had a reader, who’s an amateur toy maker, […]
Tiny Bicolor LED Fader
Not all Arduino projects demand all GPIOs. ATtiny85 microcontroller certainly helps in miniaturizing such projects as required. So, for simple projects, the ATtiny85 can be a great choice. Recall that the ATtiny85 microcontroller chip is […]
Water Outflow Alarm v1
Water outflow alarms (flood sensor alarms) are arguably the most widely used commercial water leak detectors since they are cheap and easy to install. A water outflow alarm helps protect your home and belongings from […]
Overheat Sensor Arduino Siren
Not long ago, I played around with making an overheat sensor siren on the Arduino Uno, which I later modified a bit and incorporated into another hobby electronics project. Needless to say, it worked fine. […]
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 […]
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 […]
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 […]