Simple PWM Stirplate Controller - Page 3 - Home Brew Forums
Home Brew Forums > Home Brewing Beer > DIY Projects > Chillers & Stir Plates > Simple PWM Stirplate Controller
Cool Brewing Giveaway - Supporting Membership Drive & Discount

Reply
 
Thread Tools
Old 01-29-2011, 03:42 PM   #21
gunner65
Recipes 
 
Feb 2010
Lexington, KY
Posts: 843
Liked 17 Times on 14 Posts


Quote:
Originally Posted by rocketman768 View Post
Good god man...555s are like $0.50 or less at mouser.com. Talk about markup.
Radio hack is high but they are local. So we pay for instant gratification I support them when I can because they are the last place that has parts and pieces. You can buy a PWM kit for $7.99 that was what I bought for my PWM boil kettle control.


__________________
Single Vessel BIAB is all I need....Until we figure out the no vessel technique.

 
Reply With Quote
Old 01-30-2011, 06:57 PM   #22
rocketman768
HBT_LIFETIMESUPPORTER.png
 
rocketman768's Avatar
Recipes 
 
Feb 2008
Evanston, IL
Posts: 1,083
Liked 24 Times on 21 Posts


Updated diagrams to be more accurate and less messy; added NPN option.



 
Reply With Quote
Old 01-30-2011, 07:30 PM   #23
Flomaster
Recipes 
 
Nov 2010
Orange, Ca
Posts: 2,087
Liked 38 Times on 35 Posts


rocketman, if I could trouble you for links to the actual products on mouser.com


R1 = resistor ?

sorry electronic noob here.

I can solder and follow directions well. its just that those electrical diagrams are way over my head.

-=jason=-

 
Reply With Quote
Old 01-30-2011, 07:41 PM   #24
rocketman768
HBT_LIFETIMESUPPORTER.png
 
rocketman768's Avatar
Recipes 
 
Feb 2008
Evanston, IL
Posts: 1,083
Liked 24 Times on 21 Posts


Quote:
Originally Posted by Flomaster View Post
rocketman, if I could trouble you for links to the actual products on mouser.com


R1 = resistor ?

sorry electronic noob here.

I can solder and follow directions well. its just that those electrical diagrams are way over my head.

-=jason=-
Yup. R = resistor, C = capacitor, Q = transistor. Be sure to read my notes immediately following the pictures.

 
Reply With Quote
Old 01-30-2011, 11:24 PM   #25
kladue
Senior Member
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Dec 2006
Turner, Oregon, Oregon most of the time now
Posts: 2,305
Liked 53 Times on 47 Posts


Here is a I2C controlled PWM gadget if you are into PWM control with a Arduino or other platform http://shop.moderndevice.com/product...bs-dimmer-plug. It looks like it should be able to drive SSR's as they draw about the same current as LED's do.

YeasternStar Likes This 
Reply With Quote
Old 03-01-2012, 07:33 AM   #26
hexman
Recipes 
 
Apr 2010
Melbourne AU
Posts: 2

Hi rocketman, great looking design, i'm planning to build one asap, but i wanted to ask about what would a suitable mosfet transistor be...
I can only get my hands on a IRF1405 which is rated for 55V/169A
I know it's way over spec, but will it work? Are there any drawbacks to using it?

Thanks

 
Reply With Quote
Old 03-01-2012, 01:46 PM   #27
thargrav
Registered User
Recipes 
 
Dec 2009
Huntsville, Alabama
Posts: 817
Liked 38 Times on 35 Posts


Quote:
Originally Posted by rocketman768 View Post
That's what I was talking about when I said resistor voltage division. Until you turn the pot up to about 1/3 or 1/2, the fan won't move. I hate that, because the lower end of the speed range is gone.
The problem with a potentiometer is at the lower end you have no torque. This causes the motor to stall under a slower spinning starter.

 
Reply With Quote
Old 03-01-2012, 02:59 PM   #28
rocketman768
HBT_LIFETIMESUPPORTER.png
 
rocketman768's Avatar
Recipes 
 
Feb 2008
Evanston, IL
Posts: 1,083
Liked 24 Times on 21 Posts


Quote:
Originally Posted by hexman View Post
Hi rocketman, great looking design, i'm planning to build one asap, but i wanted to ask about what would a suitable mosfet transistor be...
I can only get my hands on a IRF1405 which is rated for 55V/169A
I know it's way over spec, but will it work? Are there any drawbacks to using it?

Thanks
Should work perfectly well.

 
Reply With Quote
Old 03-01-2012, 04:14 PM   #29
phertwo
Recipes 
 
Aug 2011
Burlington, Ontario
Posts: 32

Rocketman, I just came across your post just before I was going to pick up some components for making a stir plate. I like your design and want to give it a try, but just one question... What is the voltage for the power supply? 12VDC?

Thanks!!

 
Reply With Quote
Old 03-01-2012, 04:41 PM   #30
rocketman768
HBT_LIFETIMESUPPORTER.png
 
rocketman768's Avatar
Recipes 
 
Feb 2008
Evanston, IL
Posts: 1,083
Liked 24 Times on 21 Posts


Quote:
Originally Posted by phertwo View Post
Rocketman, I just came across your post just before I was going to pick up some components for making a stir plate. I like your design and want to give it a try, but just one question... What is the voltage for the power supply? 12VDC?

Thanks!!
Depends on your motor. The 555 usually accepts 5V-15V, so whatever in that range works best for your motor.



 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
And one more DIY stirplate... -TH- Chillers & Stir Plates 9 01-03-2012 09:05 PM
Inline Thermometer Build - 3/4" - Simple Simple passedpawn Kettles, Mash Tuns & Hot Liquor Tanks 22 07-21-2011 11:42 AM
DIY Stirplate help chode720 Chillers & Stir Plates 19 03-02-2011 04:19 AM
blender stirplate anderj Chillers & Stir Plates 3 02-04-2008 05:54 PM
Simple Stirplate DRAGGER Chillers & Stir Plates 2 01-05-2008 11:28 PM


Forum Jump