Electrical Engineering Weekly Newsletter - Monday, March 30, 2015

Top new questions this week: Why AT command set? Frankly, Why do all communication ICs(or at least many of them or most famous or popular) such as Bluetooth or WIFI or GSM or etc support AT command set? why don't they have a simple pin for D/C(Data ... digital-communications   asked by Roh 12 votes answered by carveone 24 votes Why do they make traces to LTZ1000 in spiral shape? I was browsing Google images of LTZ1000 voltage reference IC. I saw that in some of the PCBs, the traces that go to LTZ1000 are in spiral shape and cut out gaps are left between them. What is the ... pcb-design voltage-reference trace   asked by hkBattousai 11 votes answered by tomnexus 5 votes Why use AutoCAD Electrical? I'm an electronic & electrical engineering student in first year of university. I have had to use a few core programs as part of my course for programming and simulation software. However I came ... assembly electrical cad   asked by Kristopher Rahim Afful-Brown 9 votes answered by Li-aung Yip 15 votes What is the purpose of input protection on USB (or at all)? I have seen quite a bit where reverse biased diodes are used to clamp input voltages when spikes occur. What is the typical reverse breakdown voltage for a diode used in this type of application? ... usb diodes protection static   asked by sherrellbc 8 votes answered by Matt Young 4 votes What are these cream plastic-like blobs on my circuit board? I see these white/cream colored blobs all over the board (I've surrounded them with red rectangles in the image above), something which I've never encountered before. They're plastic like in texture, ... pcb repair   asked by Sammy Hosny 7 votes answered by Nick Alexeev 3 votes What type is this connector? Can anybody tell me the name of the connector shown in these photos? (I mean the biggest one, which is centered in the photos) connector   asked by giomasce 6 votes answered by Michael Karas 6 votes Where is the cold junction on the commercial thermocouples? According to all textbooks and articles, a thermocouple must have a cold junction somewhere on the middle of it. But none of the commercial products have a middle point or a marked spot for ... temperature packages thermocouple physical-design junction   asked by hkBattousai 6 votes answered by Wouter van Ooijen 9 votes Greatest hits from previous weeks: Is C++ suitable for embedded systems? A common question, here and elsewhere. Is C++ suitable for embedded systems? Microcontrollers? RTOSes? Toasters? Embedded PCs? Is OOP useful on microcontrollers? Does C++ remove the programmer too ... c++ embedded   asked by Toby Jaffey 86 votes answered by Jay Atkinson 70 votes Rules and guidelines for drawing good schematics We see a lot of poorly drawn schematics here. A few times people have actually asked for critiques of their schematics. This question is intended as a single repository on schematic drawing rules ... schematics   asked by Olin Lathrop 134 votes answered by Olin Lathrop 173 votes Can you answer these? Modbus over USB-CDC and similar Modbus RTU (Specification) is a protocol that's designed to be used with transports with relatively precise timing, which native serial ports can handle. It uses the timing to handle framing the ... usb-device modbus   asked by Chintalagiri Shashank 1 vote FTDI2232d + TM4C1294 configurations I posted this question before, but I am still struggling with this. I captured a schematic and others in this time so it should be more clear to see what's going on. I was given a custom board ... microcontroller usb uart jtag ftdi   asked by Jin 1 vote Contactless detection of current So I'm wondering if it's possible to detect a current passing through a specific cable inside a bunch, without being able to touch the cable at all... In other words : Is it possible to detect the ... electromagnetism wiring   asked by DuskFall 1 vote

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