Author Topic: Opensprinkler boards Round 2 Q & A  (Read 22781 times)

Offline mygoggie

Re: Opensprinkler boards Round 2 Q & A
« Reply #135 on: November 15, 2019, 01:00:05 PM »


@Mars67 how did you fit the Raspberry Zero as the cap on the sprinkler board is in the way ... did you use header extensions between the two boards or what?
Herman

~ To heal the soul is to embark on a new journey. ~

Offline Mars67

Re: Opensprinkler boards Round 2 Q & A
« Reply #136 on: November 19, 2019, 09:36:33 AM »
Yes the sprinkler board I received had the header supplied with so I used it. Jsut check if the stand-offs are the right length as the ones I received were a little short so I needed to space them with washers.

Offline Mars67

Re: Opensprinkler boards Round 2 Q & A
« Reply #137 on: November 19, 2019, 09:46:35 AM »
A new sd card seems to have did the trick.
Ill have to get some new sd cards to keep in the draw as backups, that was my last one.
Will also look into getting some backup power to the pi so I dont lose so many cards

Looks like I may have the same issue not. Also a power spike.

Offline mygoggie

Re: Opensprinkler boards Round 2 Q & A
« Reply #138 on: November 19, 2019, 05:05:40 PM »
Yes the sprinkler board I received had the header supplied with so I used it. Jsut check if the stand-offs are the right length as the ones I received were a little short so I needed to space them with washers.

OK, I thought so. The other option I have is to remove the cap and install another on that is shorter or laying on its side. Let me first try with a header extender.
Herman

~ To heal the soul is to embark on a new journey. ~

Offline mygoggie

Re: Opensprinkler boards Round 2 Q & A
« Reply #139 on: November 20, 2019, 06:55:19 AM »
Looks like I may have the same issue not. Also a power spike.

Normally a RPI is extremely demanding on  a SD card due to the many writes it does to the card. For that reason I only use industrial grade SD cards in the RPI. Seconly I create a RAM drive and move all /var/ files to the RAM drive.
Herman

~ To heal the soul is to embark on a new journey. ~

Offline rodga

Re: Opensprinkler boards Round 2 Q & A
« Reply #140 on: November 20, 2019, 07:12:37 AM »
Normally a RPI is extremely demanding on  a SD card due to the many writes it does to the card. For that reason I only use industrial grade SD cards in the RPI. Seconly I create a RAM drive and move all /var/ files to the RAM drive.
link to industrial grade cards please

Offline mygoggie

Re: Opensprinkler boards Round 2 Q & A
« Reply #141 on: November 20, 2019, 07:39:35 AM »
link to industrial grade cards please

This is the best value for money I use at the moment. There are other more robust cards on Farnell, but at 5x the price for a single card vs 5 cards of this. I make a disk image and if and when the card dies, I just write a new SD card.

https://www.pishop.co.za/store/sd-cards_0/sandisk-industrial-micro-sd-16gb-c10
Herman

~ To heal the soul is to embark on a new journey. ~

Offline rodga

Re: Opensprinkler boards Round 2 Q & A
« Reply #142 on: November 20, 2019, 08:12:27 AM »
thanks

Offline mygoggie

Re: Opensprinkler boards Round 2 Q & A
« Reply #143 on: November 26, 2019, 09:22:30 AM »
I have finally assembled my controller with a Pi Zero to fit onto a DIN rail. You can read more about my endeavors with it here.



Herman

~ To heal the soul is to embark on a new journey. ~

Offline sprinkler

Re: Opensprinkler boards Round 2 Q & A
« Reply #144 on: December 27, 2019, 12:21:05 PM »
Here you go. All equipment to be mounted in a IP65 rated enclosure. The isolator, two circuit breakers and the relay to be mounted on a DIN rail. Supply cable to be 2,5mm2, connecting wires to be 2,5mm2.




Would like to confirm that these parts are correct if i go according to your wiring diagram:

I already have the controller and transformer.

Isolator:
https://za.rs-online.com/web/p/products/7907434/
Relay:
https://za.rs-online.com/web/p/products/0353843/
Relay Socket:
https://za.rs-online.com/web/p/products/0353944/
MCB:
https://za.rs-online.com/web/p/products/8473125/


Offline mygoggie

Re: Opensprinkler boards Round 2 Q & A
« Reply #145 on: December 27, 2019, 12:51:07 PM »
Would like to confirm that these parts are correct if i go according to your wiring diagram:

I already have the controller and transformer.

Isolator:
https://za.rs-online.com/web/p/products/7907434/
Relay:
https://za.rs-online.com/web/p/products/0353843/
Relay Socket:
https://za.rs-online.com/web/p/products/0353944/
MCB:
https://za.rs-online.com/web/p/products/8473125/

The isolator must be 20A and be L+N. Normally a circuit breaker will be cheaper and is actually a better option.  The one you choose is incorrect.

The circuit breaker rating will depend on the pump wattage, which normally is a less than 1 kW pump. In this case then the amp rating will be 1000 W / 230V = 4,5A upscaled to 2x for startup amps to 10A then. So the circuit breaker will be a single pole 10A C-curve. The one you choose is incorrect.

The relays must be 230 V at 10A on the switching side and 24V DC on the coil side. The one you choose looks to be correct.

The relay base - You need to check if the base can handle 10A at 230VAC. I cannot find such details.

Hope this helps!

Herman

~ To heal the soul is to embark on a new journey. ~