Jump to content
Cura Connect | Survey Read more... ×
Ultimaker Community of 3D Printing Experts
Sign in to follow this  
madoverlord

Fan drive -- how much current?

Recommended Posts

I'm running two blade nano RC helicopter tail rotors on the fan circuit. This is what I found out in doing it. The fan circuit has an NPN (low side) darlington transistor BD679 as a pwm circuit. That transistor is rated for 4 Amps. However, I couldn't get even 1 Amp from it due to noise problems that I couldn't solve. I put a 1K resistor across the connection and then built my own power control circuit using just the signal. I used a MOSFET and took power from the Ultimaker to run it.

regards

 

Scott Vader

 

Share this post


Link to post
Share on other sites

I've made a fanduct for two 40mm fans. Both are 0,05A 12V. Only at 80% fanspeed they turn very slowly, on lower or higher fanspeed nothing.

The fans run perfectly at 12V form a power supply. The original ones draw 0,09A, the new ones 0,05A.

Has anyone got a clue?

 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Our picks

    • Architect Design Contest | People
      The goal of this contest is to design a set of people figurines that could be used in such a project to make an area, office or mall seem populated. 
      Think of different types of people in different environments, like walking people, people standing still, working people, and both men and women.
       
      • 31 replies
    • Taking Advantage of DfAM
      This is a statement that’s often made about AM/3DP. I'll focus on the way DfAM can take advantage of some of the unique capabilities that AM and 3DP have to offer. I personally think that the use of AM/3DP for light-weighting is one of it’s most exciting possibilities and one that could play a key part in the sustainability of design and manufacturing in the future.
        • Like
      • 3 replies
×

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!