The AD736 true-rms-to-dcconverter is useful for many applications that require precise calculation of the rms value of a waveform. This converter can determine the true rms value, the average rectified value, or the absolute value of a myriad input w…

Google : Op-Amp Level Shifter Level shifting a +/- 2.5V signal to 0 - 5V I have a front end module that generates an (ECG) signal that varies from +/-2.5 V. I want to shift this signal to 0 - 5V. What is the best way to do this? First thing to try is…

/*************************************************************************** * Linux power supply class hacking * 声明: * 本文主要是记录linux电源管理的工作机制是什么,那些供Android jni使用 * 的属性文件是如何生成的,调用机制是什么. * * 2016-2-23 深圳 南山平山村 曾剑锋 **************************************…

http://www.faludi.com/bwsn/xbee-level-shifting/ The XBee communication (RX/TX) pins definitely operate off of a 5V signal with the Arduino. We’ve seen this a lot and done this a lot, and it certainly keeps things simple. That said, there’s nothing wr…

Engineering labs are usually equipped with various power supplies, voltmeters, function generators, and oscilloscopes. One piece of equipment missing from many such labs, however, is a current source. This omission is unfortunate, because a current s…

1. 前言 power supply class为编写供电设备(power supply,后面简称PSY)的驱动提供了统一的框架,功能包括: 1)抽象PSY设备的共性,向用户空间提供统一的API. 2)为底层PSY驱动的编写,提供简单.统一的方式.同时封装并实现公共逻辑,驱动工程师只需把精力集中在和硬件相关的部分即可. 本文将从设计思路.软件架构.API说明以及怎么编写power supply driver四个角度,介绍power supply class.并会在下一篇文章中,分析power s…

故障log: %C4K_IOSMODPORTMAN-4-POWERSUPPLYBAD: Power supply 2 has failed or been turned off 在单机的情况下,我们可以很容易的判断是哪一个Power Supply故障了,但是在VSS环境下,没有注意过这类log,可能有点迷糊,这哦Power supply 2是指Switch 1的PS呢还是Switch 2呢? 实际情况如下: 如果是Standby的电源故障了,会是如下情况: *May  1 09:23:45.23…

Description Symptom:Following error messages will be seen intermittently.%PFMA-2-PS_FAIL: Power supply 2 failed or shutdown (Serial number DCBxxxxx)%NOHMS-2-NOHMS_DIAG_ERR_PS_FAIL: System minor alarm on power supply 2: failed or not powered up%KERN-3…

Adding Digital control to Dual tracking LM317 / LM337 Bench supply I've been working on my own idea for a digitally controlled power supply over the last couple of weeks, originally using a MIC29302 which didn't look too bad, and a handful of DACs an…

http://www.freelabs.com/~whitis/electronics/jtag/ One of the big issues in making a JTAG pod is level translation. The state of level translation ICs leaves a LOT to be desired. You would think that there would be a lot of chips that you could apply…