[Chinese Edition]Six-year Summing-up Work Report of a Startup in Internet of Things Industry
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Electromagnetic Shielding
Part I: Selecting the Proper Shielding Materials At first, we need to introduce a physics concept Skin Depth, before discussing the shielding materials. The Skin Depth δ is defined as the depth below the surface of the conductor at which the current density has fallen to 1/e (about 0.37) of its surface current density[2]. It is
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Measuring EMI with Homemade Magnetic Field Probe
Part I: Magnetic Field Probe The theories behind the Magnetic Field Probe (Near Field Probe) is not very complex. Roy Ediss well stated the theories and the various designs of the Magnetic Field Probes in his article, Probing the Magnetic Field Probe. I implemented the design 2(a) which mentioned in the Roy Ediss's article. I
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Peripheral Boards
The Peripheral Boards which are designed by myself will be listed in this page. Pmod-Compatible Modules (Designed for Xilinx ZedBoard, Altera DE2-70, etc.) Application Notes Altera DE2-70 FPGA Development Board to Pmod Converter Schematics AD5623 & AD7274 Module (ADC/DAC) Schematics ADXL345 & HMC5883 Module (3-axis accelerometer & 3-Axis Digital Compass) Schematics MAX3232 Module Schematics PGA112
Smart Home Portal
– Smart home application framework Application Notes Overview Smart home portal is a web-based smart home application framework which is optimized for smartphone. Refer to the flowing system diagram, the Arm based embedded system (Raspberry Pi with add on boards) should be placed in the home which runs Web server with PHP and CGI/FastCGI supports.