Our Valued Sponsor
OpinionsConsumer ReviewsGuides and How TosCoffeeGeek ReviewsResourcesForums
Espresso: Espresso Mods and Restorations
Computer controlled temp and flow profiling
Cafe Solutions
Commercial sales and service, nationwide installation, equipment leasing options.
www.seattlecoffeegear.com
 
Not Logged in: Log In to Postlog in
New Topics updated topics   New Posts new posts   Unanswered Posts new unanswered  
Search Discussion Board search   Discussion Board FAQ faq   Signup sign up  
Discussions > Espresso > Espresso Mods > Computer...  
view previous topic | view next topic | view all topics
showing page 9 of 9 first page previous page
Author Messages
jonr
Senior Member


Joined: 25 Jun 2013
Posts: 298
Location: Americas
Expertise: I like coffee
Posted Sat Mar 29, 2014, 5:41pm
Subject: Re: Circuit diagram
 

I would draw the circuit with "Hot, 120VAC (isolated)" at the top, then a diode pointing downward, then the pump, then the IGBT, then "AC Neutral/Computer Ground" at the bottom.  Put the second diode (kickback/snubber) across the pump, but pointing up.
back to top
 View Profile Link to this post
jonr
Senior Member


Joined: 25 Jun 2013
Posts: 298
Location: Americas
Expertise: I like coffee
Posted Mon May 5, 2014, 4:01pm
Subject: New flow measurement
 

The hacking bug is kicking in again and I'm considering trying something other than the scale for measuring flow.  The scale works fine, but it does make cleaning a little harder.  Most people use a paddle wheel flow meter, so I'm considering something different.  How about a differential pressure transducer measuring the pressure drop across 12 inches of before the pump tubing?    According to my calculations, it should work.  Or maybe the pulsing of the pump will make it too noisy.  But I can sample it rapidly and average.
back to top
 View Profile Link to this post
dannyzee
Junior Member


Joined: 19 Jun 2014
Posts: 24
Location: Saskatchewan, Canada
Expertise: Just starting

Espresso: Gaggia Classic, Rancilio...
Grinder: Baratza 685 Virtuoso...
Posted Fri Jun 20, 2014, 11:14pm
Subject: Re: Computer controlled temp and flow profiling
 

So, where might one find a copy of your code, if I were to purchase the hardware?
back to top
 View Profile Link to this post
jonr
Senior Member


Joined: 25 Jun 2013
Posts: 298
Location: Americas
Expertise: I like coffee
Posted Fri Jul 4, 2014, 7:17pm
Subject: Re: Computer controlled temp and flow profiling
 

Just send me a private message and I'll get you the code.
back to top
 View Profile Link to this post
dannyzee
Junior Member


Joined: 19 Jun 2014
Posts: 24
Location: Saskatchewan, Canada
Expertise: Just starting

Espresso: Gaggia Classic, Rancilio...
Grinder: Baratza 685 Virtuoso...
Posted Sat Jul 5, 2014, 7:46am
Subject: Re: Computer controlled temp and flow profiling
 

At the risk of sounding less than intelligent, I don't see a method to PM you. Is this perhaps because I am a junior member? Or is it perhaps because I am using my phone to view the site?
back to top
 View Profile Link to this post
jonr
Senior Member


Joined: 25 Jun 2013
Posts: 298
Location: Americas
Expertise: I like coffee
Posted Sat Jul 5, 2014, 2:01pm
Subject: Re: Computer controlled temp and flow profiling
 

Sorry.  I have now sent you an email with a zip file that can be loaded into the mbed online development system.  The code is very well documented.
back to top
 View Profile Link to this post
dannyzee
Junior Member


Joined: 19 Jun 2014
Posts: 24
Location: Saskatchewan, Canada
Expertise: Just starting

Espresso: Gaggia Classic, Rancilio...
Grinder: Baratza 685 Virtuoso...
Posted Sat Jul 5, 2014, 3:22pm
Subject: Re: Computer controlled temp and flow profiling
 

ok, thanks, I got it, but no time to look at it just yet, hoping to be able to port the code into a pic. again, thanks, & I will let you know how it goes.
back to top
 View Profile Link to this post
dannyzee
Junior Member


Joined: 19 Jun 2014
Posts: 24
Location: Saskatchewan, Canada
Expertise: Just starting

Espresso: Gaggia Classic, Rancilio...
Grinder: Baratza 685 Virtuoso...
Posted Mon Jul 14, 2014, 10:13am
Subject: Re: Computer controlled temp and flow profiling
 

Where did you find an rtd for $4.00? I currently use a tc, but would prefer the rtd for more accurate temperatures.
Thanks
back to top
 View Profile Link to this post
showing page 9 of 9 first page previous page
view previous topic | view next topic | view all topics
Discussions > Espresso > Espresso Mods > Computer...  
New Topics updated topics   New Posts new posts   Unanswered Posts new unanswered     Search Discussion Board search   Discussion Board FAQ faq   Signup sign up  
Not Logged in: Log In to Postlog in
Discussions Quick Jump:
Symbols: New Posts= New Posts since your last visit      No New Posts= No New Posts since last visit     Go to most recent post= Newest post
Forum Rules:
No profanity, illegal acts or personal attacks will be tolerated in these discussion boards.
No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum.
No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek.
No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum.
Who Can Read The Forum? Anyone can read posts in these discussion boards.
Who Can Post New Topics? Any registered CoffeeGeek member can post new topics.
Who Can Post Replies? Any registered CoffeeGeek member can post replies.
Can Photos be posted? Anyone can post photos in their new topics or replies.
Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts.
Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.
Coffee Kids
Help folks who help folks in coffee producing nations.
coffeekids.org
Home | Opinions | Consumer Reviews | Guides & How Tos | CoffeeGeek Reviews | Resources | Forums | Contact Us
CoffeeGeek.com, CoffeeGeek, and Coffee Geek, along with all associated content & images are copyright ©2000-2014 by Mark Prince, all rights reserved, unless otherwise indicated. Content, code, and images may not be reused without permission. Usage of this website signifies agreement with our Terms and Conditions. (0.197789907455)
Privacy Policy | Copyright Info | Terms and Conditions | CoffeeGeek Advertisers | RSS | Find us on Google+