Generating a single pulse without using delay and resources

hello,

for railroad project drive electro magnet. how can generate single pulse (-+ 200 - 250 ms)?
now use function reads values each time check takes of resources of arduino mega think.
delay,... isn't available in case.
i found topics wasn't thing.



regards,
minitreintje

code: [select]


void loop() {
  static unsigned long pulsetimer.
  if (timetodoapulse && !doingapulse) {
    doingapulse = true;
    pulsetimer = millis();
    digitalwrite(solenoidpin, high);
  }

  if (doingapulse && millis() - pulsetimer >= 225) {
    digitalwrite(solenoidpin, low);
    doingapulse=false;
  }
}

     

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