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Recent content by myle00

  1. M

    Multiple noise sources filtering with ferrite beads.

    Hi, I have an ADC board which I'm trying to improve by getting rid of some noise (although it does work fine now). The board from left right is basically an ADC <-> buffer <-> microcontroller <-> FT232R. There are 0.01uF and 10uF caps at each of the chips. Power comes from a 7805 regulator...
  2. M

    74HC595 (shidt register) data output is out of phase with clock

    The frequency is 250kHz. I tried entering the data to the first sr on rising edges, but now even the first sr doesn't output its 8 bits correctly, probably because the data that I input is still unstable when the clock goes high. So I think that I should enter the data on falling edges so that...
  3. M

    74HC595 (shidt register) data output is out of phase with clock

    Correct. Ohh, you're right. You were counting + edges in which you're correct that there's 8. But I was counting from when I first output the data line to high which was when the clock was low. So counting 1 low+high as a single cycle, the output was shown at 7.5 cycles. But I get it now that...
  4. M

    74HC595 (shidt register) data output is out of phase with clock

    Using the pin naming used in this data sheet (page 2): https://www.onsemi.com/pub/Collateral/MC74HC595A-D.PDF Orange trace is "Shift clock", blue trace is "A" (data input), and green trace is "SQh" (that you called Q7'). The purple trace is the "Latch clock". Matt
  5. M

    74HC595 (shidt register) data output is out of phase with clock

    Hi, I'm trying to connect multiple 74hc595 shift register in series so that I can get more than 8 bits output. The problem is that the data output of the first shift register, which is supposed to be the data input to the second sr, is early by half of a clock cycle relative to the input data...
  6. M

    FT2232H bit banging and serial interface simultaneusly on 2 channels

    So I tested the performance on two computers and following is the data. In the zip file is the cpp file that ran the test, 2 txt log files for both computers and a excel file analyzing the data and graphing. What I tested was as you increase the transfer size and you request reads/writes in...
  7. M

    FT2232H bit banging and serial interface simultaneusly on 2 channels

    @bigdogguru I have been using an FT232 for a while now on my own PCB board, it interfaces directly to an AVR micro (which interface to an ADC) as well as to a shift register controlling valves. Both I communicate with (simultaneously) using bit bang modes. I haven't used the FT2232H yet, but I'd...
  8. M

    FT2232H bit banging and serial interface simultaneusly on 2 channels

    Hi, I have seen that people on this board have used the FT2232H before. This IC has two separate ports which you can bit bang or use a USB to serial converter. I'm wondering if it's possible to use the bit bang interface on one channel and the serial interface on the other at the same time? The...

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