![]() ![]() It is not a commercial project of which a million units are made. In post #32 there is a clear expanation of how it works, together with a bunch of screenshots from Sigrok / Pulseview.Ī hobbyist certainly will not outgrow the STM32F103 family quickly, and small projects like this are perfect for getting familiar with it. This results in a waste of time and frustration, and all for maybe trying to shave EUR 0.50 off of the BOM.Īnd all the while they do not have extra pins for debugging purposes.Įxtra I/O pins for debugging with a Logic Analsyer is an extremely helpfull while searching for software bugs. A month later the few KB of Ram or Flash they have is filled and they need to switch uC for their project. I also see lots of beginners on avrfreaks (for example) who start with a small 8pin tiny AVR and then have to add shift registers or I/O expanders because they run out of pins. Posted in Arduino Hacks, LED Hacks Tagged clock, lcd, led Post navigation I’m not sure if you would want to attach your expensive camera lenses to a home-made projector like this, but it’s good to have the option if you have a dead E-mount lens that you were going to tear apart for parts anyway. has released all of the files he created for the project, including a number of options for the case that can use C-mount and Sony E-mount lenses. His project has room to grow as well: it runs from an Arduino compatible STM32 that could handle many things other than showing the time if you were inclined to expand the project further. He does a nice job of laying out his thinking in this design, showing how he calculated the projection path and made other decisions. Cheap is the order of the day here, and succeeded admirably, creating a design that can be made with a couple of cheap PCBs, a 3D printer and the other parts mentioned above. Just scroll below, find the right category for you, and grab the alarm clock and get ready for better morning wake-up calls from now on.įor more great ways to improve your sleeping and waking hours, check out our round-up of smart sleep trackers, home tech that’ll boost your productivity in the a.m., and mattresses for truly restful sleep.There are plenty of cheap projection clocks available, but as points out in this project, where’s the fun in just buying something? He set out to build a cheap projection clock using a small LCD screen, a cheap LED backlight, and a cheap lens. We also categorized each alarm clock so you can easily find a clock that fits your wake-up needs. All of these clocks have at least 4.2 stars or more on Amazon and have received testing and reviews from publications like Sleep Foundation, Wirecutter, and The Strategist. In order to select the best alarm clocks for you, we combed through reputable publications and Amazon to find the top-of-the-line options. Of course, telling the time is going to be a priority, but you can also get temperature, weather, white noise machine functionality, and more. Other features: Consider what features you want your alarm to include. Power: Many alarm clocks are corded, but if you want one to bring along with you, you’ll want a battery-powered option. Also, you’ll want to consider if you want a digital or analog clock. Sunrise alarm clocks use a light cycle to wake you up more naturally and others can use vibrations if you tend to sleep through a beeping alarm.ĭisplay: You’ll want a display that is easy to read. ![]() Some alarm clocks use radio or alarm tones, while others can sync with music on your phone. Type: See how customizable the alarm is and how it suits your wake-up style. Here are some features you might want to consider: There are plenty of different features that make some alarm clocks more suited to you than others. You don’t have to-and shouldn’t-just grab the first alarm clock that catches your eye.
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