Plasma Ball anatomy

Forum 2005-2010 (read only) General Exhibition
19

Finally... Arduino!!
The square wave generator is replaced by a diecimila board:

A minimal code to emulate the wave generator

// PWM with adjustable frequency and duty cycle  -  stripped version tested for Diecimila board
// Credit to westfw and selfonlypath

int on = 12;            // Parameters for frequency and duty cycle
int off = 48;           // 16.45 kHz   20% duty

void setup()
{
  pinMode(3, OUTPUT);
}

void loop()
{
  cli();
  while (1) {
    PORTD |= 0x8;        delayMicroseconds(on);           // pin 3  HIGH
    PORTD &= ~0x8;       delayMicroseconds(off);          // pin 3  LOW
  } 
}

That's it,
the objective to replace 4 componants (2$) by 200$ worth of sophisticated equipment is fully reached ;D ;D ;D
Knowledge is priceless... :wink:

@ Selfonlypath
The scope is plugged between drain and V+ (HV transfo primary connections)
The MosFet drain is fed with 3.3V only