Electrical Engineering Weekly Newsletter - Monday, September 28, 2015

Top new questions this week: Difference between real binary value and oscilloscope value I tried to see an ASCII "A" character with an oscilloscope but the real binary value and oscilloscope values are different why is that? ASCII "A" Binary value - 01000001 The oscilloscope displays ... serial oscilloscope   asked by user38701 14 votes answered by PkP 32 votes Why were NES cartridges unreliable? Why did they take so much effort to get playing properly? This has always been something I was curious about, but now as I'm researching building circuits for use as game pieces it's actually a professional curiosity. Specifically swappable, interlocking ... connector   asked by Chris 9 votes answered by Adam Lawrence 16 votes How to solder something as tiny as this? I have an LED strip that is a little over 1 cm wide with 5 connectors on it, each about 1 mm wide I estimate. The wires on the left are the ones that were originally on this strip. It's supposed to be ... soldering   asked by Roel 8 votes answered by Chuck 28 votes Strange behaviour in PCB when solenoid turns off Hi all, I designed a PCB for a lock control. You can see the PCB on the image. Some explanation on the abbreviations: Ext: exterior 12V power source Batt: 12V battery 1702: 12V to 5V power ... pcb solenoid   asked by bunny 8 votes answered by WhatRoughBeast 7 votes How can a synchronous motor have RPM other than 3000/3600? It is said, that synchronous motor is rotating at the same speed as magnetic field rotates. But three-phase made magnetic field rotates as the frequency of current, i.e. 50 or 60 times per second, ... motor synchronous   asked by Dims 7 votes answered by CasaMich 15 votes Why are these readings violating ohm's law? (Are they?) I'm brushing up on my high school electronics knowledge and I decided to experiment with a small acquarium pump I had lying around. I took some measurements with a multimeter and the results confuse ... multimeter ohms-law   asked by Bas 6 votes answered by helloworld922 12 votes Multiple diodes in series reverse biased I was thinking about a question that was just up here, someone's interview I think. Anyway I'd never really thought about what happens when you have two diodes in series but reverse biased. ... diodes   asked by confused 6 votes answered by The Photon 6 votes Greatest hits from previous weeks: What are the differences between a gyroscope, accelerometer and magnetometer? What is the difference between a 3-axis gyroscope, 3-axis accelerometer and 3-axis magnetometer? How do these sensors work? Why are all 3 used in some devices like smartphones, tablets, quadcopters ... sensor accelerometer gyro imu compass   asked by Kicsi Mano 27 votes answered by drxzcl 35 votes What is "forward" and "reverse" voltage when working with diodes? What is the difference between "forward" and "reverse" voltages when working with diodes and LEDs? I realize this question is answered elsewhere on the interwebs such as wikipedia, but I am looking ... led diodes   asked by JYelton 22 votes answered by AndreKR 18 votes Can you answer these? Switching power supply layout review In a previous question where a SMPS based on an LM5118 was presented, some aspects of the layout were pointed out as being problematic. I've taken another look at the layout of that section of the ... pcb-design switch-mode-power-supply layout emc   asked by Amr Bekhit 1 vote Unknown SOT-23-5 I2C device I have a small board that stores some static and dynamic data: cc 80bytes of serial number, manufacturing date and a counter. The board has two SOT-23-5 components: one is with CBOCX and one is with ... i2c eeprom   asked by ZeitGeist 1 vote Ethernet LED & Diffpair Clearance How do you maintain creepage distance between diff pairs and the LED terminals on an Ethernet connector? My understanding is that based on EN60950, for 250V IT equipment, the air clearance is 2mm and ... led ethernet clearance creepage   asked by philby 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