Electrical Engineering Weekly Newsletter - Monday, November 30, 2015

Top new questions this week: Why are the three component LEDs in an RGB LED so unbalanced? I was recently spec-ing some RGB LEDs for a project, when I noticed that the millicandela ratings on the three colors are rarely close to the same number. (i.e. 710mcd Red, 1250mcd Green, 240mcd ... led rgb balancing   asked by user38168 15 votes answered by Brian Drummond 19 votes What if there are an odd number of twists in a twisted pair cable? I am not an electrician, or a student of the field. I am a Network Engineer with a curiosity bug and that has recently taken me to exploring cabling and Twisted Pair specifically. I say this to plead ... ethernet twisted-pair   asked by Eddie 15 votes answered by Wouter van Ooijen 18 votes Why do multimeters have an aluminium foil at the back? I was wondering what is the purpose of aluminium foil at the back of some multimeters? I did a continuity test and found that it is connected to the ground (COM) terminal. My initial guess was that ... ground multimeter   asked by Kishore Saldanha 8 votes answered by Dave Tweed 6 votes How come RTOSs are considered deterministic? On a pc (an OS of course) any C program becomes indeterministic in terms of timing. For instance a loop takes between 1.2 and 1.3 seconds depending on "how fast I am moving another window". It is ... embedded rtos   asked by ozgur 8 votes answered by Nick Johnson 5 votes Does each microcontroller line have its own programming language/syntax? I've programmed the Arduino and have started programming the Teensy. They are similar to C but there are slight nuances in the programming language. For instance, in Arduino's C you call a function ... microcontroller programming   asked by Minh Tran 8 votes answered by alex.forencich 13 votes What determines sizeof(int) Regarding the standard data types, What is the size of an integer in ATmega controllers? And what determines the size, is it just the compiler? Or is it in the hardware design of the controller itself ... microcontroller c atmega embedded   asked by Blacky Ducky 7 votes answered by Tom Carpenter 11 votes How can a smartphone's extended battery be same size as the original battery? I know this is kind of a basic question, there might be a few ways to answer it... Recently I found out there is a slim extended battery which has the same size as OEM battery (I mean really same ... batteries battery-charging cellphone   asked by King Chan 7 votes answered by sharptooth 10 votes Greatest hits from previous weeks: What do solid/striped lines on a wire indicate? What do solid or dashed lines on a wire indicate? Is there a difference between the solid and dashed indicators? wiring   asked by Mark Harrison 12 votes answered by In silico 16 votes How can I tell the size of a barrel power connector? Spring cleaning, and I'm trying to get power supplies for all my devices with missing power supplies. They're all the typical barrel power connector, and I'm having a dickens of a time trying to ... power-supply connector   asked by dwwilson66 21 votes answered by helloworld922 9 votes Can you answer these? Performance comparison of dual core and quad core processors with same TDP Athlon X2 340 (dual core) and Athlon X4 740 (quad core) from AMD have same architecture and both have same TDP (65W). They also have roughly similar frequency. Does this means that at full load, the ... cpu watts core   asked by user2015 1 vote Include libraries in GHDL I'm using GHDL to simulate some designs that I'm doing. Now, I included the float_pkg package to work with floats in Sigasi but when I'm simulating in GHDL it states that primary unit "float_pkg" not ... vhdl simulation floating-point   asked by João Pereira 1 vote PIC's serial receive peripheral questions I have a few questions regarding the PIC16F690's USART when doing asynchronous receives, and the user guide is sending me mixed signals. It has a two character FIFO buffer, and I'd like to know: ... microcontroller pic serial peripheral   asked by FrancoVS 2 votes

Subscribe to more Stack Exchange newsletters Unsubscribe from this newsletter or change your email preferences by visiting your subscriptions page on stackexchange.com. Questions? Comments? Let us know on our feedback site. If you no longer want to receive mail from Stack Exchange, unsubscribe from all stackexchange.com emails. Stack Exchange, Inc. 110 William St, 28th Floor, NY NY 10038 <3