Technology

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Turn Your Smartphone Into a Digital Microscope For Under $10 - LifeHack
Turn Your Smartphone Into a Digital Microscope For Under $10
QH88 ⭐ Link QH88.COM Tặng 100K Mới 2005
15 Cool things you can do with USB OTG Cable in Android that will Blow your Mind
Laser Mic Makes Eavesdropping Remarkably Simple
Here's a surprisly simple way to build yourself a laser-based listening device. It consists of two modules, a transmitter and a receiver. The transmitter is a set of lasers, one is visible red for aim...
This circuit converts surrounding radio frequency waves to electric power. It can provide 40 Volts at 10 Watts indefinitely. The output power can be improved playing with the antenna. Placing the antenna near large metal objects gives more power. Antenna should be more than 150 feet long wire, placed horizontally as high as you can for best results. The pointing direction also is critical to the output.
20 Unbelievable Arduino Projects
20 Unbelievable Arduino Projects
Measuring heart rate with a piezoelectric vibration sensor
Piezo sensor taped to finger. Measuring heartbeat with a Piezoelectric sensor and arduino. Might be a fun activity for our youth.
How to Use Digital Potentiometers to Control Light and Sound
Figure B: These pin functions are shared by all digital potentiometers in the AD5220 family.
16 Amazing Things You Can Do With a Raspberry PI - Gadz-Geek Blog
16 Amazing Things You Can Do With a Raspberry PI
A much better list of free, useful software.
A much better list of free, useful software.