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Many times we must interface 5V to 3.3V devices. This occurs very frequently on Arduino, but other applications need 5V to 3.3V ICs or systems to communicate. For instance, imagine you want to connect to your Arduino Uno, which works at 5V, a 3.
Have you ever wondered why there are only 7 pins on the NES controller port, but 8 buttons (plus power and ground)? How does the NES know exactly what button is being pushed? Also, how long does it take for the console to know that you’re pushing a button at all?
This tip for creating glass substrate circuit boards at home might hew a bit closer to arts and crafts than the traditional Hackaday post, but the final results of the method demonstrated by [Heliox] in her recent video are simply too gorgeous to ignore.
The current state of virtual personal assistants — Alexa, Cortana, Google, and Siri — leaves something to be desired. The speech recognition is mostly pretty good. However, customization options are very limited.
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