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Recent content by hoang_quy

  1. H

    How to protect code when I used the EEPROM of DSPIC?

    I use the DSPIC 30F4011 for my project. When I config to protect code. The EEPROM alway readed is 0x00. My PCb have designed without the external EEPROM such as 24C04 ... Please help me ! Thanks a lot !
  2. H

    Looking for Orcad layout tutorial

    Re: orcad layout I think you can open 1 PCB sample (the *.max file).You click menu>hepl>learning layout on tab menu .A table will display .You choose the layout or layout plus .Then choose the lesson menu and continue .
  3. H

    How to print the POWERPCB with hole in via or pad ?

    I use the POWERPCB to design layout .But when I print it ,the Via ro pad has not the hole .I need print with hole to do PCB with hand .Please help me !.Thank you alot !
  4. H

    How to import schematic from DXP2004 to POWERPCB 4.0!

    I have schematic have designed in DXP2004 .I don't want drawn layout in the DXP2004 because it is slowly and difficult .I want import schematic from DXP2004 to POWERPCB 4.0! Please hepl me !Thank !
  5. H

    How to add free Via in POWERPCB4.0

    Thank you very much .
  6. H

    How to add free Via in POWERPCB4.0

    I am using POWERPCB4.0 but I don't know how to add free Via to connect the layer Copper ON the TOP and the BOTTOM (no net in there) .Please hepl me .Thank!
  7. H

    How can I read analog values with dsPIC?

    dspic adc example Example 17-5: Converting 4 Channels, Auto-Sample Start, TAD Conversion Start, Simultaneous Sampling Code ADPCFG = 0xFF78; // RB0,RB1,RB2 & RB7 = analog ADCON1 = 0x00EC; // SIMSAM bit = 1 implies ... // simultaneous sampling // ASAM = 1 for auto sample after convert // SSRC =...
  8. H

    How to make the dirll with oblong or oval shape in Pads

    Thank you very much .I design successful .
  9. H

    How to make the dirll with oblong or oval shape in Pads

    routing oval shape I design my project using POWER PCB and Pads2005 .But I don't how to make the dirll with oblong or oval shape .The default is round shape .Please help me !
  10. H

    Interfacing 3.3V microcontroller to a 5V devices

    74hct244 circuit +3.3 You can using 74LCX4245 for your project .
  11. H

    Difference between sine wave and PWM

    ups pwm v/s sine wave If you don't use feedback ,It is very easy .You design the sintable from exel .Examle :Use function ROUND(1024*SIN((2*3.14159*($C1))/400),0) for 400point per cycle .If you have feedback ,It is hard with some control such as PID,Fuzzy...
  12. H

    How translators schematic from Orcad Capture to PowerPCB ?

    orcad capture and powerpcb I want Translators schematic from Orcad Capture to PowerPCB .I want draw PCB for PowerPCB when I had schematic from Orcad Capture .Hepl me !
  13. H

    Make True Sin Inverter ?

    true-sinüs inverterler I have proplems when write the program to make a true sin Inverter .When the Load is R the output is good .But when the load is nonlinear ( as a full wave rectifier ) ,the output isn't sin wave .I use the PI control for output voltage .I think I need use the PI for the...
  14. H

    High speed USB host needed.

    I think you can use TUSB6250 from TI .It have high speed USB 2.0 .
  15. H

    Dot Matrix Display Simulation

    dot matrix simulation I think this file will useful for you
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