pic based oscilloscope clock


Posted on Feb 4, 2014

For those are not into electronics, you must know that an oscilloscope has basically only one timebase to move the spot horizontally from left to right with the same intensity. The vertical deviation is function to the input voltage. You understand immediately that you can`t directly display 7 segment digits, because you can`t move the spot from r


pic based oscilloscope clock
Click here to download the full size of the above Circuit.

ight to left. By using X/Y mode, where the spot is controlled on two axes by two different voltages, it is possible to draw a picture (as in the examples mentioned above), but a fast digital to analog converter with two channels and at least 8 bits of resolution would be needed. By using 2 PIC outputs and a basic R2R digital to analog converter, we can have up to four different voltage levels : 3 for the vertical segment, and another one where to put the spot when it is not in use to draw a segment. But the problem is that a 7 segment digit may have up to 3 horizontal lines at a time (like 2, 3, 8, 9. ) but we can draw only one during one spot deviation. So we will have to cheat with retinal persistence and use multiple frames : since we can have only one vertical segment per period, three periods will be needed to draw a full 7 segment digit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    FrontDesigner 3.0
    89Sxx Development Board
    Count Down Timer with PIC16F84A
    5V 0.5A power supply
    AM portable Reciever Using ZN414
    The Hall A Wire-chamber Gas System Ops Manual
    10hz 60mhz frequency meter
    buffer amplifiers
    alternating flasher circuit diagram
    Home Automation through Cellphone Keying
    Yaesu FT-101 HF Transceiver
    SYNTHESIZER BASICS
    A-3-7-type air compressor control circuit
    BE-150 mainframe computer switching power supply circuit



    Top