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A Speaking Ultrasonic Distance Sensor
[Klaus] wanted some sort of aid for parking his car, and after running across a $4 ultrasonic sensor, decided to build his own speaking distance sensor (.de, Google Translation). Inside [Klaus]’...
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Hackaday Links: December 8, 2013
Let’s start off with some high voltage. Here’s a sweet Jacob’s Ladder build from [Robert]. The site hosting his short writeup has been up and down for us so here’s a cache link. Speaking of high...
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Acoustic Wayfinder for the Visually Impaired
Ideally, technology is supposed to enhance our lives. [Shane and Eileen], two seniors at Cornell have found a great way to enhance the lives of visually impaired individuals with their acoustic...
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Mustachioed Rover Simultaneously Manly, Adorable
[Rick], an Adafruit learning system contributor, is excited by the implications of STEM’s reach into K-12 education. He was inspired to design Red Rover, a low-cost robot that can be easily replicated...
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Good Vibrations: Giving the HC-SR04 a Brain Transplant
[Emil] got his hands on a dozen HC-SR04 ultrasonic sensors, but wasn’t too happy with their performance. Rather than give up, he reverse engineered the sensor and built an improved version. Hackers,...
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HC-SR04 Isn’t the Same as Parallax PING))) But It Can Pretend to Be!
“It’s only software!” A sentence that strikes terror in the heart of an embedded systems software developer. That sentence is often uttered when the software person finds a bug in the hardware and...
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SRF01 Ultrasonic Sensor Teardown
The SRF01 is a popular ultrasonic sensor used primarily for range finding applications. [Jaanus] discovered that they had a few flaws, including not working after being dropped. The faulty ones began...
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YAGDO – Yet Another Garage Door Opener
It seems like every few months we cover another garage door opener, and the concept is quickly becoming the “Hello World” of DIY home automation. In this installment, reader [ray] made his own garage...
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Hackaday Prize Entry: A Bracelet for the Blind
The World Health Organization estimates that around 90% of the 285 million or so visually impaired people worldwide live in low-income situations with little or no access to assistive technology. For...
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Pinging the Depths of a Rain Barrel
Rain barrels are a great way to go green, as long as your neighborhood doesn’t frown upon them. [NikonUser]’s barrel sits up high enough that he has to climb up on an old BBQ and half-dangle from the...
View ArticleDual Sensor Echo Locator Gives High Accuracy at Low Cost
Infrared certainly has its uses, but if you’re trying to locate objects, ultrasonic detection is far superior. It’s contact-less, undetectable to the human ear, and it isn’t affected by smoke, dust,...
View ArticleMinimalist Mate Maker Keeps You Caffeinated
Americans love their coffee. The Brits adore their tea. In South America, the number one way to get through the day is with yerba mate, a tea made from the yerba plant. It is typically shared in a...
View ArticleUltrasonic Sensor Helps You Enforce Social Distancing
If you’re going outside (only for essential grocery runs, we hope) and you’re having trouble measuring the whole six feet apart from other people deal by eye, then [Guido Bonelli] has a solution for...
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Trampoline Bounce Counter Has Raspberry Pi Automate Away Your Parental Duties
If you have a toddler and a mini-tramp you know the rallying cry of “Mama, Count!”. If you don’t don’t have either of these things, become the hero uncle or aunt by building one for your family members...
View ArticleContactless Doorbell Built To Avoid Coronavirus
It’s often said that necessity breeds creativity, and during a global pandemic such words have proved truer than ever. Realising the common doorbell could be a potential surface transmission point for...
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Seeing-Eye Shoes Pair Computer Vision with Haptic Feedback
Over the years, we’ve seen plenty of projects that use ultrasonic or time-of-flight sensors as object detection methods for the visually impaired. Ultrasonic sensors detect objects like sonar — they...
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2023 Halloween Hackfest: Treat Trough of Terror Is Actually Pretty Cute
Even though it seems the worst of COVID has passed, October generally kicks off cold and flu season, so why not continue to pass out Halloween treats in a socially-distanced fashion? That is, of course...
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