Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
You must login to post a message.

10/15/2021 2:19 AM
merlot85, maycondelpiero and hoeltz, Welcome !

10/14/2021 10:06 AM
Thanks for the addition to the group. Seriously considering building a drum roaster along the lines of oldgrumpus's. Love the design and craftsmanship.

10/14/2021 4:00 AM
Morning, ar3mia ! and... coffee drink

10/12/2021 11:55 AM
Evan Slack and CupOfJoe, Welcome !

10/07/2021 3:24 AM
Larry140, Roastiva and fkrauthan, Welcome !

In Memory Of Ginny

Latest Donations
JackH - 25.00
snwcmpr - 10.00
Anonymous - 2.00
Anonymous - 5.00
Anonymous - 5.00
Users Online
Guests Online: 14

Members Online: 0

Total Members: 7,360
Newest Member: maycondelpiero

View Thread

Who is here? 1 guest(s)
 Print Thread
TC4+ Arduino coffee roaster shield (TC4-compatible)
I am a bit hesitant on where to connect the PWM 2A AC Light Dimmer Module into TC4+. The seller of the PWM module suggest one of the PWM output of the arduiono. If using this what code modification I would need for Artisan?
Can I still use the DC+ and DC- outputs? As I understand that this is for self powerring of the DC FAN by attaching the DC power supply to VIN and GND.
The PWM module is power from the arduino 5V instead. Would it work in a way that I do not attache any DC power supply, but use still the DC+ connected PWM and the DC- to GND of the PWM module? Thanks.
Assuming you're talking about the RobotDyn module dimmer...

You want the dimmer module to drive what ?

Anyway, no modification needed for Artisan to use this board.

The PWM module don't need any power, the Vcc pin can be left unconnected for TC4, it is provided for other Arduino projects.
The typical usage of this board is:
- Gnd pin to Ground of Arduino.
- ZCD pin to the Arduino gpio pin used for ZC detection
- PWM pin to the Arduino gpio pin used for OT1 or OT2, depends what is your intended usage. Don't use tc4 OT1/OT2 outputs, those are for driving a SSR !
DC+/- are dedicated outputs for the fan, don't try using them for this module board !!!

First, answer us the introductory question, what is the purpose you want for module ?
Edited by renatoa on 03/16/2021 2:16 AM
Assuming you're talking about the module from Tindie that only takes a PWM signal as input (and doesn't have a ZCD output), you would usually connect that to the IO3 header. That would then replace the DC OUT screw terminal. You could still use the DC OUT header, but it would always be at the same power level as the IO3 header, you can't control them separately. (If you do want the PWM AC dimmer board, and the DC OUT header, both separately controllable, you could use another PWM pin on the Arduino.)

If you just connect the PWM AC Dimmer board to the IO3 header, and have the Arduino connected via USB, you don't need a DC power supply. But DC OUT won't work then, of course.
I am sorry I wasn't detailed enough, but I didn't want to bother you with a lot of details. A few years back I bought a impeller for building a coffee roast cooler, but I never made it.
I thought I could use it as a both blower (lower speed, connected to the roaster column) and cooler (higher speed, using the suction side) in a arduino controlled fluid roaster. I bought suggested in
Looking back again, I noticed that there was an explanation to connect to IO3 in this, that I overlooked earlier. It is really nice on TCP4+ board that the IO3 is a 3 PIN connection (IO3, GND, 5V), so all the connection needed is in one place for the PWM board (VCC, PWM, GND). The order of the PINs needs to be changed though.
Thanks for your explanation.
This motor is an induction type, thus neither of TC4 control methods is appropriate to control its speed.
You need a variable frequency converter. Known also as VFD (Variable Frequency Drive)
Edited by renatoa on 03/16/2021 3:31 AM


renatoa wrote:
You need a variable frequency converter. Known also as VFD (Variable Frequency Drive)

I wasn't aware of that. THX.
I made exactly the same mistake, purchased a single phase blower and thought I could control it with a dimmer. Schoolboy error on my part.

Because itís single phase you will need a special single to single phase VFD, ATO make one - Iím sure others are available. The majority of VFDs are single phase input but control three phase motors. Iím mid learning curve at the moment Shock
Or, better go on the paved way... universal motors, as those used in most vac blowers, much easier to control with dimmers or TC4 PAC.
Wanted to share my SR540 TC4+ conversion. I'll create a separate thread as
Jump to Forum:

Similar Threads

Thread Forum Replies Last Post
"Well tempered roaster" more feedback Roasting Coffee 21 10/14/2021 6:26 AM
New Fluid bed roaster- Help with how to control it Fluidbed Roaster 5 10/12/2021 1:34 PM
Using a TC4 with Artisan Roaster Scope Dataloggers/Controllers/Rate of Rise Meters 28 10/10/2021 10:41 PM
Bean blend for iced coffee BLENDING COFFFE 12 10/08/2021 12:32 AM
Roaster build forced air and agitator Building a Coffee Roaster 9 10/07/2021 2:30 PM
Homeroasters Association Logo, and all Content, Images, and Icons © 2005-2016 Homeroasters Association - Logos are the property of their respective owners.
Powered by PHP-Fusion Copyright © 2021 PHP-Fusion Inc
Released as free software without warranties under GNU Affero GPL v3
Designed with by NetriX