CO2 doser and things out of my league - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 01-11-2018, 08:34 PM Thread Starter
Planted Tank Guru
 
PTrader: (0/0%)
Join Date: Jun 2013
Location: WI
Posts: 11,070
CO2 doser and things out of my league

In the real world they sell a "carbon doser" based primarily on a 555 timing chip and a Clippard mouse solenoid.
Like the concept and Theatrus has attempted (probably succeeded but proj appears dormant) to duplicate it here:
Micro solenoids for CO2 regulators - Reef Central Online Community

It dawned on me that using PWM and a MOSFET seems a somewhat similar concept but not the same...
Being mostly electronic basics idiot.. that may, in effect be what the 555 chip does but looking for alternates to skin a catfish..

Basic concept would be to control the PWM "duration" as usual. (bubble size)
Change the PWM dwell (on time) using a change in frequency. (bps)
All fed to a MOSFET to run a Clippard.
http://www.onsemi.com/pub/Collateral/TL594-D.PDF
Advantage is w/ the right chip I believe one could eliminate the MOSFET
The above chip could output up to a 6w coil (?) giving one a one chip board..


excuse the ignorance of this but a Thurs thought

Addendum: Looking at the output waveforms.. seems one could "log" the output.. i.e like a slow ramp up in CO2.. ramp down..


does any of this make sense to anyone?

"A man with a watch knows what time it is. A man with two watches is never sure."

Last edited by jeffkrol; 01-11-2018 at 08:52 PM. Reason: edit
jeffkrol is offline  
Sponsored Links
Advertisement
 
post #2 of 2 (permalink) Old 01-11-2018, 11:36 PM
Planted Tank Guru
 
Maryland Guppy's Avatar
 
PTrader: (10/100%)
Join Date: Dec 2014
Location: Arnold
Posts: 3,164
Quote:
Originally Posted by jeffkrol View Post
does any of this make sense to anyone?
Yes!
Control valves @ my work are operated in similar fashion, high PSI(540) to control a blow-off operation.
All coils require correct polarity on this equipment though!
Specialized valves from MAC & Festo in facility.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Growing is not that difficult.
Maryland Guppy is online now  
Reply

Tags
None

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome