Kingpin094
New Member
Well first I guess I should explain what I am trying to do. Everyone has
seen the effect of things infront of a stobe light. Or using a strobe light to
adjust the timing on a car engine. What I am trying to do is to make an
80mm fan appear to stop in mid-air. I have seen several schematics on
the internet for them but the all uses 5+ chips. I have used a PIC 16F628
to generate the pulses and the unit works. Here is the problem I can't get
enough power to the leds to get to full brightness or even 10% for that
matter.
The PIC generatess a PWM signal that is in sync with the fans tach output.
The actual pulse train has roughly a .1% duty cycle at 150Hz to 200Hz (4
pulses per revolution at ~2800rpm).
The question is how can I get more power to the leds while still keeping
the same or shorter duty cycle? I can get the leds to light but you have to
have the room pitch black in order to see the fan. I can post the code if
that would help.
Thanks in advance.
seen the effect of things infront of a stobe light. Or using a strobe light to
adjust the timing on a car engine. What I am trying to do is to make an
80mm fan appear to stop in mid-air. I have seen several schematics on
the internet for them but the all uses 5+ chips. I have used a PIC 16F628
to generate the pulses and the unit works. Here is the problem I can't get
enough power to the leds to get to full brightness or even 10% for that
matter.
The PIC generatess a PWM signal that is in sync with the fans tach output.
The actual pulse train has roughly a .1% duty cycle at 150Hz to 200Hz (4
pulses per revolution at ~2800rpm).
The question is how can I get more power to the leds while still keeping
the same or shorter duty cycle? I can get the leds to light but you have to
have the room pitch black in order to see the fan. I can post the code if
that would help.
Thanks in advance.