Here’s a cool set of DIY colo-changing LED coasters.  Basically, it runs on solar power, LEDs light up in red for hot drinks and blue for cold drinks.

Looks pretty simple to make, maybe a good idea for your next circuits projects.

Smart Coasters are cast-plastic coasters for your drink that light up red when you put a hot drink on top and light up blue with a cold drink. The design is fully analog– no microcontrollers and no programming– and they incorporate a solar cell so that the whole thing is hermetically sealed: waterproof and washable. Complete step-by-step DIY instructions are included for both the electronics and the resin casting.

via evilmadscientist, hungryscientist

Here’s a really cool DIY showing you how to hack a Wii sensor bar from a TV remote control.  Now, you can learn about electronics and circuits while re-making your favorite sensor bar.

Dad and I were trying to build a Wireless Sensor Bar and managed to do one that is all wires and batteries. Then He Started digging through all of his remotes around the house and found a couple that didn’t work on anything. so we set off to work on a “Version 2″ so to speak. We took one of the remotes and cut off part of the Circuit board and then drilled holes in the side for the IR LED’s and used the battery box already on the remote and made a sensor bar that is sort of “Incognito”

via hackedgadgets, hackwii

The idea here is simple.  Stick an LED and 3V 2032 battery into a paper cube orgami thingee.

Great idea, well executed.

This little LED-lit cube is much more than just a paper lantern: It’s a translucent and flexible thin-film electronic circuit that hooks up a battery to an LED, limber enough to be folded into an origami box. And the coolest thing about circuits like these? You can make them at home.

via make

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Here’s a funny cheap lie detector you can make. I don’t know if it really works since there’s no circuit diagrams but you can find lots of lie detector circuit diagrams on the internet like this one I found in about 5 seconds:

Yes, these lie detectors probably won’t work on cats, maybe try dogs.

via dailyapps

Check out this cool Winamp plugin that allows you to convert Winamp songs to sound-activated lights!

DiscoLitez is a Winamp plugin that allows you to control lighting equipment from your computer. This is done using the printer port and some external switching/driving circuitry. At the moment, you’ll have to build the circuits yourself, but they are not complicated.

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Zedomax Party Lights II

Wow, check out this GIANT volume meter! So cool lookin’~

Looks like it’s some type of microcontroller with bunch of replays… Looks pretty simple to build… (the controls i mean)

“Volumen”, a giant graphic equalizer built by Argentinian artist, Sergio Avello relays the ambient urban noise levels around the Redgaleria in Buenos Aires. Pretty intense way of visualizing the constant buzz of the city, plus nice shots of the internal circuits at the below link.

via Make

For people who have to use an extension lead in order to house all of the plugs that are needed to get power for all of your hi tech gadgets and any else that you are going to need to get you through the day.

This means that the plugs can stay in place but the power can be switched off by just raising the plug and therefore cutting the power to that particular device.

Source [Yanko Design]

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Okay, here’s a funny DIY where you can make your own sound activated party lights.

If you want the non-adult version, you can check out our Christmas Voice Activated Party Lights too. (And yes, you have to use a Magnum for this one)

This project shows you how to make a music light out of inflated condoms and LEDs wired up to the sound out of your computer.

via Make

Check out this really cool parts organizer you can make using plastic bottles and save the earth at the same time!

If you’re like me, you have a ton of PCBs laying around from things you’ve taken apart. Put them to good use and salvage the components from them.

via MakeZine