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Recent content by sandbox

  1. S

    Choosing a transformer for energy harvesting

    The ideas is to build a low power sensor device that can be plugged into any phone and use, using the battery on the phone is not an option since it needs to be hacked to get the power, an additional battery will kind of reduce the shelf life of such a product as well as limit the user...
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    Choosing a transformer for energy harvesting

    Hi all, I am trying to build the energy harvesting circuit from the following pdf : https://web.eecs.umich.edu/~prabal/pubs/papers/kuo10hijack.pdf It is a energy harvesting circuit for extracting power from the audio jack of a phone The trouble is that i cant find the part they are using on...
  3. S

    e-paper development plaform

    What is the refresh rate you are getting? What will be the price for the board, also its not clear from what you have sent but what is the size fo the display?
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    PCB Design good practices

    Thank you very much for all the helpful suggestions ! I im talking with my manufacturer to get things in order.
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    PCB Design good practices

    @mt weig, I am not transmitting a lot of current, all under 100mA on 8 mil mil traces, would i need multiple via's for that? @tpetar I will be looking around for fab houses that offer xray inspection, is it an expensive process? - - - Updated - - - @mt weig, I am not transmitting a lot...
  6. S

    Low cost RF solution for midrange communication

    I looked around for the sim card based sensor networks but could not find any, can you please post a link?
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    PCB Design good practices

    Thanks ! will go through the material posted on the mentioned thread, but it seems its all about PCB design, is there anything similar for PCB manufacturing and mass production?
  8. S

    Low cost RF solution for midrange communication

    Hi all, I am new to working with RF communication, i am looking for a low cost RF solution that has a range of about 200 meters. Preferably a multipoint network.I am not looking for something with high data rates. I have looked at the ZigBee modules 900Mhz series, but they are a bit on the...
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    PCB Design good practices

    Hi all, I am designing a circuit board for a batch of 10000 boards, I have a few questions about good practices in PCB design, mostly pertaining to reliability and manufacturability. It would be really helpful if you could give me advice or direct me to any resources . The first 3 are related...
  10. S

    [SOLVED] MSP430 Programming - Connections

    Thanks a lot ! We are just using it to program the target...
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    [SOLVED] MSP430 Programming - Connections

    Hi All, Sorry for a noobish question i am working with the TI Launchpad board . I have made a separate target board with another microcontroller and am using the Launchpad board to programme the target board. I was initially connecting the VCC, GND, RX, TX , TEST and RESET lines from the...
  12. S

    Boost converter options for Li-Po to 9V ?

    The TL496 looks really interesting, but is it recommended to use switched capacitor power supplies for audio applications ? ( i am noob in this area)
  13. S

    Boost converter options for Li-Po to 9V ?

    Thanks, that seems to be easily available here...
  14. S

    Boost converter options for Li-Po to 9V ?

    I am trying to build a headphone amp based on the LM386, nothing fancy, the thing is that i want it to run off a single cell li-po battery. Can anyone suggest a common, cheap boost converter ic that can do so? I am looking through Digikey for the parts, but i just wanted to know whether there...
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    Suggestions for common FET's

    Thanks you very much for the suggestion. I will look into CMOS analog switches, maxim seems to have a good selection. But i also wanted to know a few part number of commonly used n and p channel FET's....

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