Why we love it: Of every LED mask we've ever put on our face, this is hands-down the most fancy. It has 770 LED bulbs, emits ...
Amazon S3 on MSN
Creating a laser-guided blowgun using duct tape and basic tools
The science pros at TKOR explore how a laser guide can improve accuracy in a homemade blowgun.
YouTube on MSN
VU meter DIY kit with LEDs | LM3915N-1 LED driver
This time I bring an electronic kit for beginners, this is a very cheap and interesting device that displays audio levels ...
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