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Recent content by code_slave

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    My pcb layout, any comment?

    It will work and it's fine for hobby but: 1. Don't come into the SMT pads at a corner angle if you can help it 2. 'Neck down' any pads that take SMT pad directly to track of same width, it will stop solder getting under the resist layer on reflow. 3. 'cross hatch' that area under the chip if...
  2. C

    bit flipping algorithm

    Yes, That's why I sit on these guys….. In reality I know FS-express scans at collection within 10 minutes, they show scanning yesterday (13th), 4 days AFTER seller stated them as shipped.(It's 1-2 day delivery to H.K) I need these silicon sheets to get a bigger heatsink on the FPGA, it's...
  3. C

    bit flipping algorithm

    The rest of the post is missing. There was a paragraph above the code section that included ' dis is d PSEUDO CODE' ,. But it should be clear that it is 'PSEUDO' 'if somevariable_bitposition', Obviously neither verilog/VHDL Yep, there is a mixture, I had two projects open , VHDL/ Vlog ...
  4. C

    bit flipping algorithm

    genvar i; generate for( i=0; i<length; i=i+1 ) begin : if somevariable_bitposition assign working[i] = not working[i]; else assign working[i] = working[i]; endif end endgenerate
  5. C

    Camera Interfacing with Microcontroller or FPGA

    You want this: www.vimicro.com VC706 The output is JPG or others, communication is RS232 there are full data-sheets available and test applications BE WARNED…. There are MANY conmen on Taobao, alibaba, Ebay offering 'VC706' they are NOT. They are poor implementations using cheap 8051...
  6. C

    how to shrink an equale pulse

    Perhaps you could have come back and said , "I have found the following 3 types , could you give me any more of a pointer, I'm really stuck?" Instead you spend you time being rude, It's ok to show your true colours don't be embarrassed, i'm not. As for my level, my only talent is research...
  7. C

    how to shrink an equale pulse

    Have you researched 'multivibrator' , I'm not going to give you the full name because there are only 3 to choose from. That way you can say you found the answer yourself via research, about 5 minutes worth.
  8. C

    [moved] Design Techniques for Reduction of Digital Circuit Design

    Not completely clear about what you are trying to accomplish? Are you looking for software to help design and lay out the functions OR The actual functionality? if the actual functionality have you thought about a 'State machine'?
  9. C

    Very simple circuit with a switch

    Why think so grandiose….. Just use a self locking switch. ( these are DIFFERENT from on off switches), They have a mechanical 'latch' inside but the button ALWAYS returns to the start position, however the internal contacts 'remember' the state. So : 1.button down and up = switch internally...
  10. C

    How to eliminate jitter using verilog

    No … sorry, 'Schrödinger's Cat ' shows us there are at least THREE states. Dead, Alive …. and something else. I should not have used such an analogy OT: The POINT I was trying to make was that Jitter is something that MUST be dealt with in the design. It is not just written off with some...
  11. C

    How to eliminate jitter using verilog

    And of digital signals, in fact everything in the universe suffers from jitter.
  12. C

    Read Range calculation in RFID reader using HFSS

    Anyone even a non-engineer can use google. https://www.google.com/patents/US20070241904 **broken link removed** Patents , whilst maybe not a direct solution to many of our own problems are an excellent source for out of the box thinking.
  13. C

    [SOLVED] PCB design(2 layer) Topology

    You must have some very 'limited' exposure to manufacturing then, because I have seen it across many areas and in many companies and big name testing agencies. I have an interesting photo collection of when/how things go wrong, some several thousand images. Once you get down to the grass roots...
  14. C

    [SOLVED] PCB design(2 layer) Topology

    Design/material tolerance is one of the biggest killers of production ( considering for a moment you are using good production methodology and genuine components) That and shear stupidity……….. Background Several years ago I received a good 'slapping' from a couple of directors. A fellow...

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