3.5mm stereo connectors for headphones and microphones are almost mandatory for audio projects. X1 (left) is a simple plug with connections for the audio channels (pin 2,3), and ground (pin 1). X2 (right) has pass-through contacts (pin 2,3) that divert audio to an internal speaker when headphones aren’t connected.
Here’s a breakdown of the audio connectors illustrated above. Continue reading “Parts: 3.5mm Stereo Audio Jacks”
While waiting for his clothes to dry, our reader [xaio] decided to poke around and see how his building’s coin laundry system worked. It turned out to be ridiculously simple. All he needed to do was jumper the cable coming from each machine and they’d run without issue. We wonder why the relay box is so big. In any event, it could certainly benefit from a more secure installation.
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[garygadget15] in the UK has an interesting youtube page showing an electric bicycle. On his page titled, saving money the “green way” he has replaced his commuter car with one of these electric bikes. He then videos the commute with both to compare the results. The DIY electric bicycle kit he uses is made by Cyclone comes in multiple wattage’s ranging from 180 watts to 1500 watts where they do a great job of showing the conversion steps. They’ve got enough detail that you could fab your own from salvaged parts if you felt like it.
This came in on the tipline: [Ville ‘Willek’ Kyrö] wanted to build a fully passively cooled computer. That means no fans at all. He started with scrap aluminum heatsinks, ripped apart a cpu heatsink to get the copper heat pipes, and began surrounding the boards with heatsinks to form a case. Cooling down the powersupply was the hardest part, as it did not lend itself to the flat surfaces of heatsinks. Any passive case with powerful components will inevitably be huge and heavy; this one weighs over 20 kg. He says, “It might not have been worth it, but it sure was weird watching the computer boot up with no sound at all”.
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Drawdio, designed by [Jay Silver], is a fun, simple toy that uses the conductive nature of pencil graphite to generate different sounds. When you use the Drawdio pencil to draw or write, you also simultaneously create music. The entire kit is available for sale at Adafruit Industries, or for the more adventurous, separate components and parts are listed. The circuit is fairly simple and we wonder what other devices people can come up with based on this theme.
Who knew that a silly comic strip could be so influential? XKCD’s strip focusing on the inanity of YouTube comments inspired someone to actually add the Audio Preview feature to YouTube. It’s provided us with much amusement, especially where one commenter mentions that the “preview of my own post sounded moronic!”
Speech synthesis software is nothing new, of course. While it’s not the most sophisticated software, it’s an invaluable resource to those with disabilities, language learners, and others. This tutorial on Festival, a Linux-based text-to-speech software framework, would be a great place to start. You’re just moments away from finding out how stupid email, IM, and IRC sound read aloud.
You may want to be more careful where you put that ATM card. There are now ATM skimmers with SMS notification. ATM skimmers are placed over real ATM slots and the information off the cards as they’re inserted. The new models will send the skimmed information via SMS notifications to a phone that’s attached to a computer. This solves the problem of scammers needing to retrieve their skimmers without attracting the attention of police. ATM skimmer manufacturers have so far been really successful because of their commitment to security, from the paint they use to cover their skimmers to their exclusive clientele. The manufacturer of this particular model claims that none of their clients who’ve used this new ATM skimmer has been arrested, and they only accept business from “recommended” clients. We think it’s interesting and ironic how these criminals have adapted their security procedures to deal with institutions we wish were more secure.
