• Power Supplies for LED Driving / Stevie Wonder
    Hi friends, I ask a lot of very difucult questions today because I am new and need help from you new friends. Light-emitting diodes are being widely used due to their efficient use of power....
  • About C51 library
    What is the result: memcmp(s1, s2, len) when len = 0?
  • External power supply
    hi I read the page described by you. but it does not say how to remove the resistor R37. Also where do I supply the external voltage. I want to drive the board using 9V battery ?? Can please anyone...
  • 3.3V supply for ttl/rs232
    Hi, I find a problem when I wanted to run a ATMEGA32 with VCC supply of 3.3V, everything is okay except USART. I see that if supply voltage is 5V then USART works well. With the same ttl/rs232 module...
  • C51 V6.20 & V6.21 still have reported bug
    On Nov. 11, 2001, I sent in a C51 V6.20 bug report via e-mail to support.us@keil.com. I never received a response, so assumed Keil's policy was to silently introduce the bug fix in a subsequent update...