reef-pi :: An opensource reef tank controller based on Raspberry Pi.

[Schreiber]

How would you suggest using the ferrite core like you suggested above?

There are a few schools of thought on best ferrite placement. Typically just clipping one anywhere on the wire should suffice. Clipping one near both ends can be done if you want to get a little more extreme. It's usually common practice to wrap the cord around the bead once or twice like so:

I would occasionally help the electrical group with some of their EMI testing at my old lab, so I've put plenty of these on sensitive control system sensors. No idea why it didn't occur to me! @thaistalyn may be able to chime in on exactly why they're installed this way.

 

[AbjectMaelstroM]

Anyone on 3.1 having issues with the Dashboard and displaying temp readings? Was working fine in 3.0. I did a clean install of 3.1 on a new SD card.

Every time I add current or historical Temp readings to dashboard, nothing shows up...just a blank page. Health check seems to display current and historical info fine. Temp does not. Going directly to temp probes in Temperature tab, shows correct reading and graph.

Any thoughts on this UI/dashboard issue? Just tried another clean install of rasbian and reefpi 3.1....still can't see temp reading in dashboard.

 

[thaistalyn]

How would you suggest using the ferrite core like you suggested above?

Scheiber is correct. Simply buy the clamp on cores and attach them anywhere on the cable. The device is basically a magnet that focus the interference to the ferrite core and disappates heat to a ceramic core.

The practice of "wrapping" the cable is from the use of ferrite rings. By wrapping on the ferrite ring you create an inductor that creates impedance or resistance to the interference. No need to wrap on a clamp.

 

[Des Westcott]

Scheiber is correct. Simply buy the clamp on cores and attach them anywhere on the cable. The device is basically a magnet that focus the interference to the ferrite core and disappates heat to a ceramic core.

The practice of "wrapping" the cable is from the use of ferrite rings. By wrapping on the ferrite ring you create an inductor that creates impedance or resistance to the interference. No need to wrap on a clamp.

Great. Thank you. I've got a couple on order

 

[Ranjib]

@Ranjib any ideas on what could cause this?

I introduced a dashboard bug in 3.1 while fixing another one. I have fixed it, but yet to cut 3.2 release with this fix (in couple of days)

 

[Des Westcott]

I just noticed the amount of errors in my reef-pi dashboard and decided to check them out. I normally ignore them because I don't understand what the majority of them mean and I can virtually never fix any of them LOL.

But I noticed quite a few of them were about an invalid url for AIO. AIO is set up and seems to be working just fine. Curious why it should be generating errors.

Second I noticed that there are occasional errors related to pH. I'm currently trying to see if them relate to the anomalous reading I get occasionally.

 

[Alaa]

Hi
i need help connecting my Jebao dosing pump (PD4), i have the one with the controller built in not the sleeve, it has 2 boards one connected to the motors and the other seems to be for generating signals. this is done by the controlling a 74HC595 Shift Register on the first board.
I tested the rj45 connections and one is connected to ground (not 12 volt power like in the sleeve model as posted by @Michael Lane)
i know i can use 2 TB6621 boards to control the 4 motors, however i did some research online and found that the 74HC595 Shift Register can be controlled by raspberry pi but couldn't get any clear instructions
It Would be great if anyone can help with this, i need to control the 74HC595 Shift Register with PCA9685 through reef-pi
also if that is difficult can I try and use the rj45 poet to control the motors through ULN using the same wiring as reported by @Michael Lane
thanks

 

[Ranjib]

I just noticed the amount of errors in my reef-pi dashboard and decided to check them out. I normally ignore them because I don't understand what the majority of them mean and I can virtually never fix any of them LOL.

But I noticed quite a few of them were about an invalid url for AIO. AIO is set up and seems to be working just fine. Curious why it should be generating errors.

Second I noticed that there are occasional errors related to pH. I'm currently trying to see if them relate to the anomalous reading I get occasionally.

the adafruit io error likely indicate a temp or ph or ato name has space in it (that causes wrong feed name), the ph driver error is something i have experienced as well. Its either another electrical device interferring or some issues with driver / code. I have never seen it persistently in a stable build.

 

[Des Westcott]

the adafruit io error likely indicate a temp or ph or ato name has space in it (that causes wrong feed name), the ph driver error is something i have experienced as well. Its either another electrical device interferring or some issues with driver / code. I have never seen it persistently in a stable build.

Thanks. I have taken all Caps and spaces out of Temp, pH and ATO names. Cleared all errors - Lets see.

 

[Des Westcott]

Thanks. I have taken all Caps and spaces out of Temp, pH and ATO names. Cleared all errors - Lets see.

Hhhhhhmmmmm. Took all the Caps etc out and cleared the Errors and a whole lot popped right back.

 

[Ranjib]

I just noticed the amount of errors in my reef-pi dashboard and decided to check them out. I normally ignore them because I don't understand what the majority of them mean and I can virtually never fix any of them LOL.

But I noticed quite a few of them were about an invalid url for AIO. AIO is set up and seems to be working just fine. Curious why it should be generating errors.

Second I noticed that there are occasional errors related to pH. I'm currently trying to see if them relate to the anomalous reading I get occasionally.

the adafruit io error likely indicate a temp or ph or ato name has space in it (that causes wrong feed name), the ph driver error is something i have experienced as well. Its either another electrical device interferring or some issues with driver / code. I have never seen it persistently in a stable build.

 

[marekd1]

Hi
i need help connecting my Jebao dosing pump (PD4), i have the one with the controller built in not the sleeve, it has 2 boards one connected to the motors and the other seems to be for generating signals. this is done by the controlling a 74HC595 Shift Register on the first board.
I tested the rj45 connections and one is connected to ground (not 12 volt power like in the sleeve model as posted by @Michael Lane)
i know i can use 2 TB6621 boards to control the 4 motors, however i did some research online and found that the 74HC595 Shift Register can be controlled by raspberry pi but couldn't get any clear instructions
It Would be great if anyone can help with this, i need to control the 74HC595 Shift Register with PCA9685 through reef-pi
also if that is difficult can I try and use the rj45 poet to control the motors through ULN using the same wiring as reported by @Michael Lane
thanks

You will need to unplug the motor wires from the board on the expansion unit and plug into PCA9685 .

There is no need to use the original board. Program PCA9685 in Reef-Pi as doser and you should be good to go.

 

[skywurz]

Just wanted to drop in and show some pics of my build.

 

[Ranjib]

Just wanted to drop in and show some pics of my build.

Epic :-) .

 

[Phildago]

@Ranjib are there plans to add stepper motor control? Id have my reef pi controlling my doser, but if I were to ever upgrade I think a stepper motor would be the ideal choice

 

[Ranjib]

@Ranjib are there plans to add stepper motor control? Id have my reef pi controlling my doser, but if I were to ever upgrade I think a stepper motor would be the ideal choice

Yes there is plan for stepper motor control. The idea is to test it out with stepper based doser and also to use it as the foundation for titration related work in future.

 

[Schreiber]

Thought you may be interested in this, @Ranjib . The Reef Bot page has a developer section where you can apply for access to their API. I know Reef Bot implementation is probably way down the list of priorities, but cool to know the option is there.

 

[Ranjib]

My availability will be little think next few

Thought you may be interested in this, @Ranjib . The Reef Bot page has a developer section where you can apply for access to their API. I know Reef Bot implementation is probably way down the list of priorities, but cool to know the option is there.

Nice. I dont have any immediate plans to work on any of this.

 

[inktomi]

Hi! I wanted to run an idea past you all as a sanity check.. I have some LED lights that are controlled via 24V PWM. In looking, it seems like there's a Mean Well supply that accepts PWM signals and outputs a 24V PWM signal. It can also work based on varying the resistance between the input wires, which seems like it could perhaps make it easier vs generating and controlling a PWM signal.

ELG-75-12A

ELG-75-12A MEAN WELL | Mouser

ELG-75-12A MEAN WELL LED Power Supplies 60W 12V 5A CC+CV IP65 Io Adj w/pot datasheet, inventory, & pricing.

www.mouser.com

This should be possible to hook up as a light, right?

The data sheet is here https://www.mouser.com/datasheet/2/260/ELG-75-SPEC-1109967.pdf and the dimming specs are on page 4. It takes a 10V PWM signal in, and converts it to 24V out. Seems reasonable, seems easy.. right? I should be able to just use the PWM output signal following the Kessil guide, right?

 

[Ranjib]

Hi! I wanted to run an idea past you all as a sanity check.. I have some LED lights that are controlled via 24V PWM. In looking, it seems like there's a Mean Well supply that accepts PWM signals and outputs a 24V PWM signal. It can also work based on varying the resistance between the input wires, which seems like it could perhaps make it easier vs generating and controlling a PWM signal.

ELG-75-12A

ELG-75-12A MEAN WELL | Mouser

ELG-75-12A MEAN WELL LED Power Supplies 60W 12V 5A CC+CV IP65 Io Adj w/pot datasheet, inventory, & pricing.

www.mouser.com

This should be possible to hook up as a light, right?

The data sheet is here https://www.mouser.com/datasheet/2/260/ELG-75-SPEC-1109967.pdf and the dimming specs are on page 4. It takes a 10V PWM signal in, and converts it to 24V out. Seems reasonable, seems easy.. right? I should be able to just use the PWM output signal following the Kessil guide, right?

Pca9685 generates 3-5v pwm signal, you have to pass it through an intermediate circuit (similar to kessil controller) to convert it 10v. Ldd series mean we’ll drivers will work straight with 5v pwm