Fresh hacks every day
The problem with laser etching dark materials is that the areas burnt away by the intense light don't really stand out from the rest of the surface. [The 5th Fool] is taking a roundabout way of correcting this by topping his laser engravings with contrasting paint. The technique is still pretty simple and we think it looks great! Basically he's etching a layer of painter's tape which becomes … [Read more...]
Here's a weekend junk bin project if we've ever seen one. [Pat] used a quartet of computer fans to make his laser Spirograph. Deciding to try this simple build for yourself will run you through a lot of basics when it comes to interfacing hardware with a microcontroller. In this case it's the Arduino Nano. The Spirograph works by bouncing a laser off of mirrors which are attached to the PC … [Read more...]
[Wardy] built himself a high quality entropy source with parts he had lying around. It's based on the hourglass entropy project we saw in a links post earlier this month. Just like that project, he is bouncing a laser off of the falling sand and reading the result. But he brings a few innovations to the party, and has test results to back up his work. The first change is an obvious one; … [Read more...]
Do not aim laser at remaining eye Over on the reddits, [CarbonGod] thought he had a slightly overpowered laser pointer. His red laser pointer had a label that said it outputs less than 5 mW. The only problem is it melted black plastic and heated a thermocouple up to 140°F. [CarbonGod] is begging, borrowing, or stealing a power meter from an engineer friend, but until then we've got … [Read more...]
This is one of those ideas that's so simple we can't believe we haven't heard of it before now. [Johan von Konow] is upping his holiday decorating game this year by designing his Gingerbread House in CAD and cutting it out on a laser cutter. If designed well this will easily allow you to increase the complexity of your design by orders of magnitude. We remember making Gingerbread Houses with … [Read more...]
This office has a Foosball league that automatically tallies and posts the standings for each employee. This is thanks to all of the extra electronics that were added to the Foosball table in the break room. The system is connected to the internet via WiFi. This allows it to store the final results of each game for use on the leader board. Player first identify themselves to the system using … [Read more...]
Here's one of the best takes on a glowing display that we've ever seen. Currently [H] is using his creation as a fuzzy clock, but it is certainly capable of displaying just about any messages. The project uses a wheel of luminous paper as the display surface. This has a glow-in-the-dark quality to it which can be charged up using a bright light source. In this case a UV laser diode was used. … [Read more...]
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