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How to Make Your Own Sugru Substitute
This looks like a really cool project, I especially like how the light diffusion is done with heat-bent acrylic and spraypaint instead of painstakingly sanding it into a light diffuser. However, I'd strongly recommend using an addressable strip like Neopixels or any cheaper WS2812 strip instead. You will not need any voltage conversion since they run on 5 volts, and it takes all the insane effort of wiring so many transistors out of the project. You would need to modify the code to treat each tower as one continuous strip but you'd have a much easier time wiring and coding for it. https://www.amazon.com/gp/product/B019IBG53C/ref=o...
Cheap and Easy Tachometer (RPM Sensor) for Brushed DC Motors
This won't substitute the need to walk to various locations to catch pokemon, just gets rid of the tedious walking in circles many might do otherwise to rack up travel distance for hatching eggs. Personally I think it's an inventive way of getting around one of the less amazing parts of the game. Especially for the many kids who can't drive around with their phones like so many adults playing the game do.
Because the phone is rotating, even if it were spinning in place, I believe it still repeatedly forceds the GPS to update what direction the player is facing. With the phone sitting still, this doesn;t happen. So effectively this gadget is constantly causing that jitter to occur whereas it might only happen a couple times a minute otherwise.
Computer Power Supply to Bench Power Supply Adapter
How to make a Fake Virus with a Batch File
RFID Controlled Door