Curious Inventor Blog

Just another WordPress site

SMS to Cheap Scrolling LED using Arduino USB Host Shield and Android App

This project shows how to send SMS text messages to a cheap scrolling LED display via an Android app and arduino with USB host shield.

The project was originally inspired by a friend wanting to make a “sexting themed” costume, with a scrolling LED display of live texts sent from people at the party.  We found a $13 LED belt buckle online, which looked cool, but only had a few buttons to manually enter in messages. A couple wires and lines of arduino code later, we were able to automate entry of messages.
Continue reading “SMS to Cheap Scrolling LED using Arduino USB Host Shield and Android App”

The Essence of How Bitcoin Works


A brief intro to the main ideas behind How Bitcoin Works, including how money is transferred, who keeps track of it, and how the whole thing is secured.

Augmented Reality Circuit Building Guide

An iPad app that provides augmented reality steps for building a circuit on a bread board. Graphics are overlayed on the actual breadboard to show you exactly where to put parts, and provide extra information, like values, tolerances, and voltages.

How to Desolder Through-Hole Joints

This video demonstrates the use of solder wick (braid), a solder sucker (desoldering pump), and desoldering gun. It explains why some joints are hard to desolder: large ground planes or components, small holes, low quality pcbs. Finally, some alternative methods are shown, including cutting the leads, pulling one lead out at a time for resistors and other two-legged parts, and heating all the pins at once, using an iron, hot air or ChipQuik.