Hi
is it posibel to set the frequency of the PWM to 10 HZ ?
And if so, how is it done ?
I have been reading this page : https://arduino-info.wikispaces.com/Arduino-PWM-Frequency
And here it look's like that the lovest HZ it can run is 30.64 HZ. on D9, D10 and D3 & D11
thank you for your help 
Best regards
Thomas
//---------------------------------------------- Set PWM frequency for D5 & D6 -------------------------------
//TCCR0B = TCCR0B & B11111000 | B00000001; // set timer 0 divisor to 1 for PWM frequency of 62500.00 Hz
//TCCR0B = TCCR0B & B11111000 | B00000010; // set timer 0 divisor to 8 for PWM frequency of 7812.50 Hz
TCCR0B = TCCR0B & B11111000 | B00000011; // set timer 0 divisor to 64 for PWM frequency of 976.56 Hz (The DEFAULT)
//TCCR0B = TCCR0B & B11111000 | B00000100; // set timer 0 divisor to 256 for PWM frequency of 244.14 Hz
//TCCR0B = TCCR0B & B11111000 | B00000101; // set timer 0 divisor to 1024 for PWM frequency of 61.04 Hz
//---------------------------------------------- Set PWM frequency for D9 & D10 ------------------------------
//TCCR1B = TCCR1B & B11111000 | B00000001; // set timer 1 divisor to 1 for PWM frequency of 31372.55 Hz
//TCCR1B = TCCR1B & B11111000 | B00000010; // set timer 1 divisor to 8 for PWM frequency of 3921.16 Hz
TCCR1B = TCCR1B & B11111000 | B00000011; // set timer 1 divisor to 64 for PWM frequency of 490.20 Hz (The DEFAULT)
//TCCR1B = TCCR1B & B11111000 | B00000100; // set timer 1 divisor to 256 for PWM frequency of 122.55 Hz
//TCCR1B = TCCR1B & B11111000 | B00000101; // set timer 1 divisor to 1024 for PWM frequency of 30.64 Hz
//---------------------------------------------- Set PWM frequency for D3 & D11 ------------------------------
//TCCR2B = TCCR2B & B11111000 | B00000001; // set timer 2 divisor to 1 for PWM frequency of 31372.55 Hz
//TCCR2B = TCCR2B & B11111000 | B00000010; // set timer 2 divisor to 8 for PWM frequency of 3921.16 Hz
//TCCR2B = TCCR2B & B11111000 | B00000011; // set timer 2 divisor to 32 for PWM frequency of 980.39 Hz
TCCR2B = TCCR2B & B11111000 | B00000100; // set timer 2 divisor to 64 for PWM frequency of 490.20 Hz (The DEFAULT)
//TCCR2B = TCCR2B & B11111000 | B00000101; // set timer 2 divisor to 128 for PWM frequency of 245.10 Hz
//TCCR2B = TCCR2B & B11111000 | B00000110; // set timer 2 divisor to 256 for PWM frequency of 122.55 Hz
//TCCR2B = TCCR2B & B11111000 | B00000111; // set timer 2 divisor to 1024 for PWM frequency of 30.64 Hz