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[on:]

HI all.
I want to make a programmable pulse generator using Arduino.
The "specifications" I need are the following:
A) first output generates 10 usec pulse with frequency 10 Hz.
B) One "enable" input. When it goes high all others pulses get generated.
All following pulses are generated once with relative delay to the first pulse A after B went high.
C) 10 usec pulse with variable 10-200 usec delay
D) 5-20 msec pulse with delay from 1 msec to 20 sec.
All pulses are TTL.
I would like to set up (throuhg comport or LPT port or USB) delay of pulse C, delay and width of pulse D.

Is it possible to do with one arduino uno board without a shield. 
Thank in advance for any advise where to start.

 

[Reply #1 on:]

Start reading the tutorial section - http://www.arduino.cc/en/Tutorial/HomePage - and the reference section - http://arduino.cc/en/Reference/HomePage

especially while()  micros() digitalRead() and digitalWrite() and last but not least the blink without delay example (reference page)

[Reply #2 on:]

Here is a script I use to do pulse width modulation for a electroplating tank
the pulse width is determined by a potentiometer to the analog in.

You could just as well control it with input from the USB port. There are lots of sample of how to do this in the Forum

Code:

// set pin numbers:
 int platepin = 2;
 int plateGrnd =3;
 int unplatepin =4;
 int unplateGrnd=5;
 int DutyHi;
 int DutyLo;   
float DutyRatio;
 
void setup() {
  // set the digital pin as output:
  pinMode(13, OUTPUT); 
  pinMode(2, OUTPUT);
  pinMode(3,OUTPUT); // go low when 6 is high
  pinMode(4, OUTPUT); 
  pinMode(5, OUTPUT);// go low when 7 is high
}
void Sequence_plating()
{
 
  digitalWrite(unplatepin,LOW);
  digitalWrite(unplateGrnd,HIGH);
  digitalWrite(platepin,HIGH);
  digitalWrite(plateGrnd,LOW);
  delay(10 *DutyHi/1023);
  digitalWrite(platepin, LOW);
  digitalWrite(plateGrnd,HIGH);
  digitalWrite(unplatepin, HIGH);
  digitalWrite(unplateGrnd,LOW);
  delay(10*(1023-DutyHi)/1023);
 }

void Get_Ratio()
{
    DutyHi = analogRead(0);
    DutyLo = 1023; //analogRead(1);
    DutyRatio = (DutyHi+1/(DutyLo+1)); // 1023/0 max
    if ( DutyHi <= 700) // warn that duty cycle is approching unplating
     {
       digitalWrite(13,HIGH);
      }
    else
      {
       digitalWrite(13,LOW);
      }
}


void loop()
{
  Get_Ratio();
  Sequence_plating();
 }

[Reply #3 on:]

first output generates 10 usec pulse with frequency 10 Hz.

for such short pulses you might need to take a look at the hardware timers - google playground timer arduino

Furthermore direct port manipulation might be needed for this kind of speed .