Electronics Design - Main Page

Do you have a question? Post it now! No Registration Necessary

Electronics Design - Design your own electronics! You are not alone.
Web, RSS and Social Media interface to sci.electronics.design
There are 559507 individual articles here that are part of 32451 discussions
Please see below the list of the most recent and the best rated articles in Electronics Design

The most recent discussions

Resonance of HV Stressed Cap - Picture This Time

January 26, 2015, 9:44 am

Based upon the replies to my previous question, I have revised my question and added a cross-sectional drawing for clarification. https://app.box.com/s/yae2m7mv5yrwzcb0pff2rgghv9mik1rg What I woul... Read more »

CDMA Repetitive Pulse Frequencies

January 26, 2015, 2:08 am

I know TDMA of the GSM standard has 8.3Hz, 115Hz and 217Hz continuous pulse repititions. What, if any, are the pulse repetitions of CDMA? In asynchronous CDMA can the pseudorandom pulses be pulse... Read more »

OT: Snow

January 25, 2015, 4:50 pm

The totals keep going up. 0 on Saturday, 24 this morning, Now it's up to 30. Cheers Read more »

Battery Packs to Use As a UPS

January 25, 2015, 4:17 pm

There are lots of rechargable battery packs sold as portable charging units for cell phones and the like. They come in many shapes and sizes and capacities. But I can't find one that says you c... Read more »

OT: Football "Physics"

January 25, 2015, 1:36 pm

http://www.thedailybeast.com/articles/2015/01/24/basic-physics-may-defeat-deflategate.html ...Jim Thompson -- I love to cook with wine. ... Read more »

AD834 Spice Model Updated

January 25, 2015, 11:12 am

The Spice Model for the ADI 500MHz Four-Quadrant Multiplier has been updated (AD834_SPICE_Model.zip) on the Device Models & Subcircuits Page of my Website, adding in the Spice model for RNOISELESS,... Read more »

John Larkin Was That You on the News?

January 25, 2015, 8:12 am

There was a brief clip of a John Larkin being interviewed as one of the passengers on one of the flights that was the object of a bomb scare. The interview was shown on the Saturday evening news... Read more »

Amplifier with very low input- design search

January 24, 2015, 9:39 pm

Hello guys, I am building an extremely low input (voltage) amplifier, with about .2 volt spikes and also -0.2 volt spikes. I just need to detect if there is a voltage, either positive or negative th... Read more »

What does Fi and Fr stand for

January 24, 2015, 6:23 pm

At the bottom of this graph are the terms n=Fi/Fr or Fr/Fi The i may be a j. What do Fr and Fi stand for. Fr is probably frequency of resonance but Fi? http://theradioboard.com/rb/download/fi... Read more »

Acoustic Resonance in Cylindrical Capacitors

  [ 2 ]
January 24, 2015, 2:52 am

I have heard that large cylindrical caps can have a self resonance at acoustic wavelengths. Does anyone know how this is applied in practice? In other words, if I wanted an acoustic resonance of 2... Read more »

Click here for other recent discussions »

The best rated discussions


rechargeable batteries

Hello How can I charge a rechargeable battery in the lab, what's the 'reverse connection'? Read more »


DSP Device for Guitar Pedal Effect

  [ 2 3 ]

I was wondering what DSP chip would be appropriate for a guitar pedal effect. I need to sample the incoming signal preferably at 96kHz perform a simple numeric function upon each sample and output h... Read more »


Protection circuit to be used for a gate pulse of SCR

Hello, I am doing a project on a temperature control system.My controller has been designed in LabVIEW and I get a control signal of 0-5V output from DAQ which needs to be given as gate pulse to SCR.... Read more »


Making piezo louder

David, Making an effective piezo drive circuit is about 10% of the work. The resonant cavity design and mounting technique of the piezo is the other 90%. You need to know how the piezo will vibrate... Read more »


Visio logic symbols

  [ 2 ]

Does anyone know of a location from which to download simple logic symbol shapes for Visio (and gate, or gate, etc)? Read more »


is the hendershot generator ad a scam?

  [ 2 3 ]

is it a scam? Will it work in a residential home ? Read more »


STmicro acceleration/magnetic sensor LSM303DLH == LIS331DLH + HMC5834?

Just had a look at the LSM303DLH datasheet and had a déjà vu ;-) It looks like ST has simply put a LIS331DLH and a HMC5843 into one package. (The HMC lacks the built-in voltage regulator) All data ... Read more »


Re: Strange control problem -- SOLVED!!! -- 3 phase "firing system&quo...

Glen, I solved the mystery. (about the firing system tripping on overcurrent with small currents, on a 200A welder) Here's what it was all about: The current sensor (connected to DC shunt) was NOT, ... Read more »


micropower boost circuit

  [ 2 ]

I need a DC to DC boost circuit with an output defined not with respect to ground, but with respect to the input, which is variable. Output about 15 volts above the input, over a wide range -- f... Read more »


Re: floppy drive emulator hardware usb or sdcard

On Apr 16, 11:53 am, alfons de wolf en e NoLife ;-) One possibility is a virtual drive. One, create a virtual drive in memory. Two, make an image of your floppy disc contents on a flash drive... Read more »