License Or No License – There Is No “Implied”

A rather hackneyed attempt at channeling Star Wars’ Yoda Puppet I admit (“do or do not, there is no try”), but it ties into an interesting point I found out this week – there is NO middle ground for licensing online. Let me explain: I use software source code obtained online, both for my consulting work and my own use, and I always check the license. Obviously, while Open Source is fine and dandy, some variations (GPL and some Creative … Continue reading

New Article On The Braille Display

After an enjoyable interview with Deputy Editor Joshua Howgego of SciDevNet, he wrote a very nice piece about the Braille machine, as well as the general need for devices like this. It’s great people are focusing on the needs of India in particular, since the combination of large blind population (about 15 million, the largest group anywhere in the world) and low income means a huge population not able to attain a decent lifestyle because of disabilities. Let’s hope there … Continue reading

Low Power Lighting For Africa – Now

I was testing on my Arduino Nano and trying to avoid looking directly at its LED – a very bright white one – while it flashed, and I wondered, why aren’t LEDs more common in Africa? I’v talked about this before, and mentioned a solution, a gravity-powered light. And I understand the cost issue; for example, prices from $20-$40 for solar or gravity-fed solutions are proposed. But they aren’t the only solution. After all, if a lousy kerosene light is … Continue reading

Debugging The Arduino With The SPI Interface Instead Of Serial.println()

Debugging The Arduino with Serial.println() throughout the code can be inconvenient, especially if speed is an issue, or you need the serial line for your program. SPI provides a faster, better alternative in these situations – or for just about any occasion, once you get the hang of it… Continue reading

SonarEye: An Open Source Way To ‘See’ With Audio Using The Arduino

I once watched a science program where a blind person walked an obstacle course. He did it by making a clicking sound and detecting objects from the sound reflected back – in effect, ‘seeing’ the path with sound. While few sighted people are that incredibly skilled, you can get a feel for ‘seeing with sound’ using a simple sonar range finder and an Arduino. It’s not just a toy (although playing tag in a dark room with a few of … Continue reading