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Winter will pass quickly (we hope so) and mosquitoes will attack us again. There are many ways to deter them - we suggest using electronics. We present the ultrasonic scare off of insects, whose characteristic feature is that the signal it generates changes over a wide range of frequencies at random intervals. This approach is necessary, because even the most primitive organism adapts to the environment and subjected to constant, invariable stimuli, (which most often occur in factory devices of this type) gets used to them. And stops responding to them, which in the case of mosquitoes is not in the hand of a man.
The device is especially recommended for gardeners and lovers of nature
Selected parameters:
- frequency of the output signal - variable in the range of 20-40 kHz
- random inclusion of emission periods
- microcontroller control
- low battery voltage indication - LED diode
- TX1 ultrasonic transducer
- power supply - 9Vdc
- a printed circuit board, programmed layout and documentation in the set
- A detailed description in EP 11/10
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The fun with marble runs continues with Ugears\' Marble Run Tiered Hoist, the third in a series of Ugears modular marble runs. This unique entrant in our growing collection of entertaining wooden marble runs features a 3-tiered stair lift that raises the marbles to the top for amusement park adventures. This wooden DIY kit is both a 3D puzzle and a fun toy. The Marble Run Tiered Hoist features a fascinating lift, three new track elements, and interesting trap and release mechanisms sprinkled throughout. Turn the hand crank and watch the marbles make their journeys through various obstacles down to the collection tray below. Multiple tracks and elements are packed into a compact space in this well-designed DIY marble run. UGears 70170
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GPS module with u-blox ZED-F9R. Uses Automotive Dead Reckoning (ADR) technology. Provides highly accurate and continuous positioning by combining the 3D IMU sensor, vehicle dynamics model, correction data and GNSS measurements. SparkFun GPS-16344
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