Infrared Motor Speed Sensor – Refined Primer
A timely review is beneficial to all. So, here’s the long-awaited sequel of my old post about infrared motor speed sensors and motor speed sensor modules. This is the direct link to read that popular […]
Optical Needle Deflection Sensor
Sometimes you may want to detect the deflection of the needle of an instrument by a non-contact method. If so, this idea might help you! I will now show you a simple technique for optically […]
Arduino Analog Sensor – Read & Display
Arduino provides a number of analog inputs which enables us to measure parameters such as voltage, current, resistance, light, temperature, and so on in the analog arena. In this post, we’ll look at how to […]
Arduino Touch Sensor/Capacitive Proximity Sensor
A capacitive proximity sensor is a non-contact device that can detect the presence or absence of an object in its close vicinity. It utilizes the electrical property of capacitance and the change of capacitance based […]
MAX30100 Pulse Oximeter & Heart Rate Sensor Module – Quick Refresher
The moment you get a MAX30100 pulse oximeter and heartrate sensor breakout board, you can move on to the process of making your own perfect pulse oximeter. But is making one as easy as you […]
Arduino PCM Audio Primer
In this primer, we’ll learn how to play an audio file thru Arduino without using any external modules. Here we’re going to use the pulse code modulation (PCM) audio technique with the help of a […]
BPW34 Tiny Solar Cell – Quick Revision!
Some small experiments on a cheapo soil meter I did recently remind me of the nostalgic photodiode BPW34. So, I think this is the right time for a quick review. Well, let me go further […]
12V SLA Battery Charger Guide
Recently, I had the opportunity to test the internal electronics of several popular Router UPS devices. Honestly, most of them are useless products and will make the router sick within days. Oh, that’s another story, […]
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 […]