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Recent content by martingn

  1. M

    FPGA board + Fx2 USB to PC

    cypress ez-usb fx2 avnet fpga thanks Purko, I'll take a look.
  2. M

    FPGA board + Fx2 USB to PC

    fx2 usb fpga ihearme, voho, Thanks both for your reply. ihearme, Throughput is not an issue for me. Which soft/firm do you use for this? Thansk for your help. Martin
  3. M

    FPGA board + Fx2 USB to PC

    fx2 fpga Hi All, My first project in FPGA and USB. I'd like to implement CY7C680013 usb as an interface for JTAG + data port for FPGA board (Cyclone). From my google/EDA research I already found a project to implement an usb_jtag . Also CY7C68013 had (slave)FIFO that could be...
  4. M

    LED PWM + BUCK with constant current

    constant current pwm circuit Pharo, Could not open the last file. (0bytes) Regards, Martin Added after 56 seconds: Now I could! Thanks! Martin
  5. M

    LED PWM + BUCK with constant current

    led pwm circuit Pharo, thanks for this good info. Regards, Martin
  6. M

    LED PWM + BUCK with constant current

    led pwm I've found a MAXIM chip that does what I want. MAX16802.
  7. M

    LED PWM + BUCK with constant current

    mc34063a led Hi All, Any idea to implement Buck step-down constant current converter for LED supply (350mA-700mA) but with also PWM for dimmering? It is suppose that there should be two frequencies involved... PWM (hundred of Hz) and Buck Switch ( KHz ). Also PWM is modulating BUCK. How is...
  8. M

    uC power supply filter

    Hi everyone, I need advice to design a filter for uC supply 220Vca to 15Vdc -1A It is running in a noisy environment and from time to time I found the uC hanged. By now it is just a transformed+full bridge diode+ cap filtering. Should I connect the (-) to earth ? Now is isolated. Should I...
  9. M

    Protel SCH/PCB to Eagle?

    Anyone can advise me how to convert some Protel files to Eagle? Thanks! Martin
  10. M

    high impedance wideband amplifiers

    Hi all! Please advice were to learn FET amplifier toplogies for high impedande wideband (50mhz) amplifier like used in oscilloscope input. thanks in advance. Martin
  11. M

    high impedance wideband FET amplifier

    Hi all! Please advice were to learn FET amplifier toplogies for high impedande wideband (50mhz) amplifier like used in oscilloscope input. thanks in advance. Martin
  12. M

    Ideas to build switch box - 4PC-to-1VGA

    Anyone has any info/idea/schematic to build a switchbox to use one keyboard/mouse/VGA with several PCs? Thanks in advance for your replies. Martin
  13. M

    help programmig 68HC908QT QY

    68hc908qt Hi All, I need advice about programming this motorola chips. I've made a programmer as per application note AN2317 and chip datasheet . I use Vtst and external 9.8304mhz. Also using P&E programmer 2.05 software with algorithm 1.20 for QT/QY. I have the following problem... I...
  14. M

    AT89C51SND1C MP3 decoder

    at89c51snd1c project Hi All, Does anybody has experience with this chip?? I appreciate any comments. Best regards, MArtin
  15. M

    How to implement FM antenna for portable system?

    FM antenna Thanks flatulent ! The case is going to be a plastic one. Should the wire be always a length multiple of a wavelength? Any suggestions? Mininun lenght? Isit posible to make it on pcb?? Is there any article to read about pcb antenna for fm broadcasting range (88-108 mhz) ? thanks in...

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