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Recent content by lhaolongli

  1. L

    Help PNP & NPN transistor with high Voltage Supplier

    You can run out of coupling isolation, protect the controller.
  2. L

    Mini APPLE II - do it yourself

    It is cool!
  3. L

    4017 driver schematic

    What do you want to say?
  4. L

    Can 89C55 be used as a flash memory?

    Some 51 has eeprom into it.
  5. L

    8051 port mapping to variables

    Yes,you are right!But don't miss ";"after"sbit var = P1^0"
  6. L

    I want to improve my programming level

    Thank you very much BigDog!
  7. L

    I want to improve my programming level

    Thank you very much, I say is the C programming, mainly is aims at the micro controller, for example: 51 SCM, AVR microcontroller, STM32, FPGA. But these things, I'm most familiar or 51 SCM.
  8. L

    I want to improve my programming level

    There was a time, find my programming level do not have too great improve, seem to meet the bottleneck. Hope to have experience more give some advices of predecessors, thanks in advance.
  9. L

    Atmel 89c51 Changes its programe counter while switching on and of 12v relay

    You can try to use a transistor drive relay

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