http://amarkham.com/?p=49…

STM32F4: Generating parallel signals with the FSMC The goal: The memory controller can be used to generate a "generic" 16-bit parallel data stream with clock. Address generation will be disregarded, as well as other control signals dedicated to…

转载自:http://ganeshtiwaridotcomdotnp.blogspot.com/2011/12/java-sound-generate-play-sine-wave.html Working source code example on how to generate and play sine wave in Java :View my previous post  for playing any PCM amplitude array. Generate Sine wave…

柱面正弦曲线 #http://www.mathcurve.com/courbes3d/couronnetangentoidale/couronnetangentoidale.shtml vertices = t = to (*PI) a = b = rand2(, ) n = rand2() x = a*cos(t) y = a*sin(t) z = b*cos(n*t)…

在球上以SIN曲线的轨迹游走. #http://www.mathcurve.com/courbes3d/couronnetangentoidale/couronnetangentoidale.shtml vertices = t = to (*PI) a = n = rand2() x = a*sin(n*t)*cos(t) y = a*sin(n*t)*sin(t) z = a*cos(n*t) 有SIN的就会有与它相反的COS的: #http://www.mathcurve.com/cour…

STM32 F4 DAC DMA Waveform Generator Goal: generating an arbitrary periodic waveform using a DAC with DMA and TIM6 as a trigger. Agenda: Modeling a waveform in MATLAB and getting the waveform data Studying the DAC, DMA, and TIM6 to see how it can be u…

RFID读写器的工作原理 RFID的数据采集以读写器为主导,RFID读写器是一种通过无线通信,实现对标签识别和内存数据的读出和写入操作的装置. 读写器又称为阅读器或读头(Reader).查询器(Interrogator).读出装置(Reading Device). 扫描器(Scanner).通信器(Communicator).编程/编码器(Programmer)等等. 读写器工作原理 RFID读写器的基本原理是利用射频信号与空间耦合传输特性,使电子标签与阅读器的耦合元件在射频耦合通道内进行能量传…

This 125 kHz RFID reader http://www.serasidis.gr/circuits/RFID_reader/125kHz_RFID_reader.htm http://www.serasidis.gr/circuits/RFID_reader/images/125kHz_RFID_reader_schem.GIF I will try to explain with simple words how the RFID works. The ATtiny13 use…

https://www.kickstarter.com/projects/1708444109/rfidler-a-software-defined-rfid-reader-writer-emul https://github.com/ApertureLabsLtd/RFIDler http://adamsblog.aperturelabs.com/2013/08/rfidler-open-source-software-defined.html The Goal To produce a to…

http://www.edn.com/design/analog/4337128/Make-a-DAC-with-a-microcontroller-s-PWM-timer Many embedded-microcontroller applications require generation of analog signals. An integrated or stand-alone DAC fills the role. However, you can often use PWM si…