hi all gurus, I have a doubt about how one chooses a microcontroller for a particular project. Say i am designing a embedded...

hi all gurus, I have a doubt about how one chooses a microcontroller for a particular project. Say i am designing a embedded wireless system. i have my specs of the protocol which works at a particular rate. say it is a low data rate network protocol. Say i implement the code for the stack. Now i need to decide on a microcontroller for the project. How do i look into the ti...

Hi, Is there any difference (hardware-wise) in the "radios" (chipsets) on the AP end of a 802.11b/g/n link and those on the "client"...

Hi, Is there any difference (hardware-wise) in the "radios" (chipsets) on the AP end of a 802.11b/g/n link and those on the "client" end? I.e., is the difference merely one of antenna gain, Tx power and *firmware* (meaning software that conceivably *could* be rewritten vs. software that is deeply and immutably buried within the chipsets)? Said yet another way, could 'n' PC's with wire...

I am a student in an embedded systems design class. I am planning a project where I'll get two 8051-microcontroller-based development boards...

I am a student in an embedded systems design class. I am planning a project where I'll get two 8051-microcontroller-based development boards with 433 MHz FM transceivers to talk to each other. Each development board will be connected via RS-232 to a computer running terminal software. My initial goal is to be able to send some keystrokes back and forth between the two systems. The real ...

Hello, I'm about to start working on a project that requires an electronic system be controlled wirelessly through the internet. I need to...

Hello, I'm about to start working on a project that requires an electronic system be controlled wirelessly through the internet. I need to develop the software (with a GUI) which you can access from the internet that would enable the remote control of the system. the system utilizes pulse width modulation to control a small positioning device. I basically have 2 questions.... 1) can anyone...

I'm looking for suggestions for a microcontroller for use in an audio player. This is going to be for a high-end player, not a mass-produced...

I'm looking for suggestions for a microcontroller for use in an audio player. This is going to be for a high-end player, not a mass-produced portable, so I'm not bothered about size or power consumption, nor am I worried about getting the lowest possible cost. It needs to have Ethernet for connecting to the outside world. Some support for wireless networking would be good too, if poss...

Hallo, we want to implement a Bluetooth protocol stack to build a wireless connection between our software modules (Windows Embedded...

Hallo, we want to implement a Bluetooth protocol stack to build a wireless connection between our software modules (Windows Embedded and microcontrollers). Has anyone had any experience with these companies: - BLUEmagic - IAR / Cybercom - Bluetopia (stonestreet one) - BOOST (Wipro-NewLogic) - aveLink (Atinav) - Broadcom - iAnywhere - BTE (Widcomm) Which of the solutions would you recomm...

Hi all, There's a thing that has been bothering me for a long time, and I'm interested in some views from other people in the embedded...

Hi all, There's a thing that has been bothering me for a long time, and I'm interested in some views from other people in the embedded field. For the past years, I've been working with/for a number of companies on quite a number of embedded systems, often Linux/uClinux based. These devices all had completely different functionalities (wireless access points, data acquisition, video encod...

I am trying to solve a problem of having wires going up to an MP3 player to the earpiece. I also didn't want the weight of batteries, e.g. via...

I am trying to solve a problem of having wires going up to an MP3 player to the earpiece. I also didn't want the weight of batteries, e.g. via a Bluetooth or other wireless head set. I did an experiment where I used conductive paint to mark out some tracks on my skin to replace wires. The conductive paint is very flexible (I put it on my hand which flexed a lot ) and there seemed to be enou...

Have have an interesting problem. I need to transfer power (7V @ 20mA approx. 140mW) across a 2-3 inch air gap without using a wire. It...

Have have an interesting problem. I need to transfer power (7V @ 20mA approx. 140mW) across a 2-3 inch air gap without using a wire. It will be in a high vibration and dirty (ie. greasy, oilly) evironment. Here are my ideas: 1) create an air gap transformer 2) use super bright LED's and a Solar panel Does any one have any experience or knowledge in this area that could offer s...

am converting an old laptop into a digital picture frame. My thought was to create a small XP (nlite) with the apps I need (slideshow, wireless,...

am converting an old laptop into a digital picture frame. My thought was to create a small XP (nlite) with the apps I need (slideshow, wireless, vnc) on a hard drive and then copy it over to a CompactFlash which I would then replace the laptop harddrive with. I've got a nice tight version on a hard drive (under 500Mb) ready to put onto CF. Problem: it doesn't appear that the BIOS I have wi...

Greetings, When an embedded wireless system has a an image sensor, what is usually used to compress the image for transfer over a GSM...

Greetings, When an embedded wireless system has a an image sensor, what is usually used to compress the image for transfer over a GSM network similar to a cell phone unit? - Do cell phones/devices have dedicated hardware (FPGA,DSP)? - Is the compression done in software? I am guessing that would need a powerful MCU that will consume a lot of power I am a new at this so any inf...

i am working on a project on wireless sensors....i need a processor where the clock frequency can be varied during RUN-TIME so as use in...

i am working on a project on wireless sensors....i need a processor where the clock frequency can be varied during RUN-TIME so as use in low-power applications....but it must not be as low as is the case in the sleep mode. i found that the option of variable frequency is not available in avr controllers on which i have worked on till now...i was thinking about msp430 series but i cannot find a ...

Greetings, I am planning a project that involves a remote sensor (eg, temp) that sits idle but has to send an alert when the trigger goes off....

Greetings, I am planning a project that involves a remote sensor (eg, temp) that sits idle but has to send an alert when the trigger goes off. The requirements are: - Low power: has to be able to remain idle for about 1 week if needed. - Has to transmit over wireless from across town (Atlanta, 30min drive or so). - In the fufture, has to be able to send an image from a camera. BW is f...

Hi, I'm a student working on an embedded systems undergraduate design project. In our project, we want to use an Atmel chip with some...

Hi, I'm a student working on an embedded systems undergraduate design project. In our project, we want to use an Atmel chip with some other Zigbee module that will allow us to transfer information using Zigbee wireless communication. We have found several choices, such as Maxstream's XBee Zigbee module, but we would prefer to use one that is from Atmel or is compatible with Atmel. We...

I often have embedded boards with a UART that shows debug logging messages. Most of the times, only the TX signal is of interest, in a few...

I often have embedded boards with a UART that shows debug logging messages. Most of the times, only the TX signal is of interest, in a few cases the debug UART features a full command line console, so both TX and RX lines are of interest. I have many UART/USB adapters and they work well when I have a desktop or mobile PC, running putty or Realterm or a similar software, near the devic...

Does anyone have any ideas for an embedded renewable/energy related project? I want to do something at home so I can put it on my resume and try...

Does anyone have any ideas for an embedded renewable/energy related project? I want to do something at home so I can put it on my resume and try to enter this field, after a LONG hiatus. Type away with what you got. I thought it would be good for me to include these aspects: - wireless communications - data gets sent to a website - SMS messaging Yea, stuff like that. If you've had any ideas...

Hi group. Would appreciate some views on this. Kindly bear with me, I have tried to provide enough information and clarity to be...

Hi group. Would appreciate some views on this. Kindly bear with me, I have tried to provide enough information and clarity to be useful: Problem statement: Need to develop a bidirectional point to multi point wireless link (meaning many sensors and one aggregation point) for purposes of industrial data collection. BOM needs to be as low as possible. Requirements: - One base station in...

Hello all, The company I work for is planning a handheld device with a touch display (320x200 pixel), WLAN and UPnP functionality to control...

Hello all, The company I work for is planning a handheld device with a touch display (320x200 pixel), WLAN and UPnP functionality to control other devices in a wireless Wifi network. Now my electronic work experience in the embedded domain seems to be a little outdated so I would kindly like to ask if somebody has tip what architecture is common and up to date now. Also a hint about displays...

So for my capstone project I've decided on a myoelectric controlled (think robotic prosthetics) wireless computer mouse. From my little reading...

So for my capstone project I've decided on a myoelectric controlled (think robotic prosthetics) wireless computer mouse. From my little reading so far, I can avoid the pc side of the bluetooth stack entirely by conforming to the Human Interface Device profile on the device side. The way I read it, it should be basically connect and play, no drivers needed. I have some decent info on the analog ...

Greetings, I am looking to get started developing a short range low power device that will consist of a controller and a device with a motor...

Greetings, I am looking to get started developing a short range low power device that will consist of a controller and a device with a motor and sensors. I would like to use ZigBee as the wireless technology solution to connect the controller to the device. It meets the price point and range that I need and the potential for mesh networking opens other future opportunities. I am curious...