×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

PC board/microcontroller to drive solenoid valves in pulse mode

PC board/microcontroller to drive solenoid valves in pulse mode

PC board/microcontroller to drive solenoid valves in pulse mode

(OP)
Hi all,

I need to drive three DC solenoid valves (12V, 0.6A) with pulses that I can adjust in 10-200 ms range with 10 ms step. Pulses follow with 2-20Hz frequencies. Duration of the sequences of pulses is 5 -15 min.
I'm currently using PC relay board but it cant generate pulses shorter than 100ms and lifetime is not long enough for my application. I'm planning to use IC PWM SOLENOID DRIVERs 7-DDPAK - DRV102FKTWT http://focus.ti.com/lit/ds/symlink/drv102.pdf (switching threshold, 1.7V) to drive the valves and a new PC board. I'm looking for a cheap PC card and software  or microcontroller that can drive  ICPWM drivers. Any ideas?

Thank you,
Alex
 

RE: PC board/microcontroller to drive solenoid valves in pulse mode

Have you looked for commercial solenoid drivers?
I'd check those out.

If I had to actually make one using a microcontroller I would be trying to go all the way and incorporate everything into the micro. That is, have it do all the control you're trying to achieve, not just the solenoids.

Keith Cress
kcress - http://www.flaminsystems.com

RE: PC board/microcontroller to drive solenoid valves in pulse mode

(OP)
I have to be able to set variable duty cycle. I could not  find any solenoid driver that has this function.

RE: PC board/microcontroller to drive solenoid valves in pulse mode

Can you say what you're driving?

Keith Cress
kcress - http://www.flaminsystems.com

RE: PC board/microcontroller to drive solenoid valves in pulse mode

(OP)
Valves control air pressure in a 400 ml cylinder.  I need to increase pressure in 1-5 psi steps to  5-10 psi and drop it down to 0 within 1-10 seconds.  

RE: PC board/microcontroller to drive solenoid valves in pulse mode

Ah.. Thanks.

What you might rather do is use the standard device for doing that kind of task.  Its name is nothing you would probably guess.  They are called "I to Pees" or I/Ps.  They are used all over industry.

They are current(I) to pressure(P) controllers. Hence "I/P".

You feed them an easy-to-generate 4-20mA signal, (a current(I)), and they accurately control the resulting pressure.

Here is an example:
http://www.omega.com/ppt/pptsc.asp?ref=ip610&Nav=prel01

Keith Cress
kcress - http://www.flaminsystems.com

RE: PC board/microcontroller to drive solenoid valves in pulse mode

(OP)

Thanks. It's a great device for my application.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close