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The Curvimeter – or opisometer – is a device that measures the length of curved lines and helps to calculate the distance between the points on a map more precisely than a ruler or a compass.
The mechanism has a measuring wheel, a clock face, and a hand. When the wheel moves along the line on a map that you need to measure, the hand moves around the clock face marked with measuring units – centimeters, inches, etc. All you need to do in the end is to check the map scale and to multiply your data by the denominator in the scale. UGears 70138
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Orange Pi Zero Plus H5 Quad Core Cortex-A53 Open Source 512MB DDR3 Development Board Mini PC
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ARM7TDMI, 256kB Flash (ISP), 32kB RAM, USB 2.0, ADC, DAC, 2xUART, 2xI2C, SPI, LQFP64, RoHS
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Pre-installed Ubuntu 16.04 or latest version. eMMC Version 5.0 interface or higher version from Samsung. JEDEC/MMCA version 5.0 : HS400 interface with 8bit DDR mode. The eMMC chipset is only compatible with Amlogic S905 and S805 series(ODROID-C1+ / C0 / C2)
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Li-Po battery 3.7V / 500mAh, PCM protection, connector + JST-BEC 2,54 socket, 2 pins, cable length 150mm
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2.5 mm JST XH-Style Shrouded Male Connector: 2-Pin, Straight
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