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Recent content by Telfo2002

  1. T

    long distance usb1.1 link

    Hi, I want to use a 4-wire unshielded and twisted cable of a indoor installation as a transmission system for a usb connection between a PC and several webcams across a house (25 to 40m away). My goal is only use 2 usb hubs (one in the connection to PC and other in a webcam). I have read that...
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    noise with tda 8703 adc converter

    I'm building a digital oscilloscope based on a tda 8703 adc, but i have a lot of noise, any trick or idea for solving noise? Thanks on advance
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    anyone has tried a bt8x8 card as a digital oscilloscope?

    I'm trying to use a bt8x8 as a digital oscilloscope. My idea is to "mount" signal over an artificial video sync and decoder later the adquired signal. But my problem is how can i adquire signal from visual c++ , does anybody has source code for adquiring video? Thanks on advance
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    algorithms for programming 16v8 gal?

    gal programming Hi, Someone knows algorithms for programming an old 16v8 gal? I'm trying to build a homemade gal programmer. Thank on advance
  5. T

    problem with pic programmer and 18f1320

    Hi, I'm using a JDM serial programmer variant (TE-20 model) for programming a 18f1320. Other pic chips are well programmed but this one not. I suspect reason could be a low MCLR voltage (between 12 and 12,30V on this programmer). Some ideas for programming that chip using this programmer? How...
  6. T

    Michochip Masters (A lot of info about pics)

    This is the official site for "Masters 2002: Microchip Summer Exchange Technical Review". A lot of application notes. **broken link removed** Enjoy
  7. T

    Using tv card as a oscilloscope

    tv card oscilloscope Is there any way of programming a PCI TV Card with a bt8x8 chip as a digital oscilloscope? I was thinking that by adapting signal levels to tv ones it could be possible in some way... Thanks in advance.
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    problem trying to program 16f818

    Hi I build a te20 programmer for PICs and it was fine for programming 16f84a devices. But by using it with 16f818, i get an error message (" verification failed "). I use ICPROG 1.05A software. Schematic of TE20 is attached (unfortunally explanations are in spanish) Thanks on advance.
  9. T

    Where can I find some datasheets of old integrated circuit?

    where I could find some datasheets of old integrated circuit? some link? Thank you on advance.
  10. T

    some circuit for PC logic analyzer?

    logic analyzer circuit I was planning a PC based logic analyzer. The idea is using a cache like sram (like 7cy199 or similar) and storing in it digital samples at high speed (40MHz) for later download to PC via PC port. First experiments demostrate concept is ok, but over 5MHz, strange digital...
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    problem with adc tda8703

    tda8703 I was building a PC based oscilloscope based on a parallel port and a tda8703 plus some glue logic. However i was having terrible problems with noise (in form of some spikes). Hardware is simple. Just a 74als244 connected to parallel port for data in(in epp mode). In one extreme and...
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    how to build an oscilloscope with 16f876 and a lcd?

    picbasic 16f876 I was thinking in using special analog I/O from 16F876 and a normal hitachi lcd with 2x32 char for having a miniscope, some ideas code for 16f876? Thanks on advance.
  13. T

    text about lego mechanics

    This perhaps would help someone. It's about how to build mechanical devices with lego (useful at building robots perhaps...) Best regards.
  14. T

    Digital 16f84 controlled power supply schematic

    Hi, does anyone where I can get information for designing and building a cheap digital power supply controlled by a 16f84? Thanks in advance
  15. T

    Question about Powerline communication circuit

    power line communication circuit I would like to communicate two computer using a 220V powerline. Where I could find schematics or information? Thanks in advance. 8)
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