💬 Roller Shutter Node

[Soloam]

@fabien said in 💬 Roller Shutter Node:

@Soloam
2 relay for interlocking system and add more security.
I never mesure my current but it's low ... not 10A !
Internal clock is not very precise and can vary with external parameters like temperature. And for this project it's better to have good precision.
It's always better to use relay driver and not directly arduino pin.

Thank you @Fabien all very clarifying, only one thing that I don't understand (sorry, but I like to use this projects to learn and improve my personal knowledge) I still don't understand way the relays are different model numbers, from what I can see, one is 4 pins, and the other 5 pins, or I'm miss interpreting?

Thank you

[gohan]

one relay only needs to be on/off while the other needs to select between up and down motion.

[scalz]

@Soloam
about relays, imagine there would be two same relays:

• two SPDT would not make sense here, plus it would add more pins.

• two SPST wouldn't be secure, there could be a moment where you could have both relays activated (for example in case pins are not well set on startup, or of bad sketch). That would not be great for motor.
  So there is one (SPST) to enable power flowing to the SPDT which toggle between UP or DOWN.

• there are parts on my schematic which could be optional. I always put as much footprints as I can, for reference, and especially when I need to fix something it's handy.
  Sure crystal could be optional, and you could burn sensebender bootloader for example, or like fabien said it's good to have. It's an AC powered node, so not really needed to try saving something. And also, if you're paranoid about sourcing cheap, and why not out of specs, atmel on aliexpress, then you have the footprints available.

• the relay driver is nice because it helps protecting atmel and improve reliability. It integrates all parts for relays in one package (transistors, diodes, resistors etc.) so it simplifies schematic and takes less place on pcb too.

• 10amp omron relays, better oversize, so you're sure they won't suffer :) and the board can be used for other stuff needing more power than rollershutters in case.

[Soloam]

@scalz this is a great work, I'm planning on ordering a couple to use on my system.

Besides that, I'm most interested in the integrated Current Sensor, and planning on use it on my one PCB. I've been studding your PCB layout and reading regarding the ACS712 and is integration with the LM321. Way didn't you use the schematic on the ACS712 DataSheet (http://henrysbench.capnfatz.com/henrys-bench/arduino-current-measurements/acs712-current-sensor-user-manual/ page 12) to integrate with the LM321? I see that you use a lot more resistors and caps, and the values are not the same. Was this intencional or you did it to reuse a footprint? Would the layout on the DataSheet also work in you board? (From what I can tell it changes the sensitivity).

Also I see a couple 0 Ohm resistor, I think that that is to reuse footprints correct?

Thank you for your help and contribute to the community.

[scalz]

@Soloam
Your link is about DC. He has another howto for AC, which is based on sampling adc but i was not interested in this one. I didn't want the current measurement dependant on sampling reliability and misses.
So I used part of datasheet schematic, and I adjusted it to my application. If you use it in another projects, you may need to adjust resistor divider etc.
0ohms needs to be soldered.

[hitech2207]

Hi,

I have been searching for a longtime for some decent rollershutter solution. I have about 12 of them and i am currently using a sonoff relay solution which works but i never really know the position if it is open or closed or pourcentage position.

What your solution seems to do.

Is it possible to interface this with amazon echo or google home to ask to open/close the shutter but also ask the status. Are my shutters open or closed? Or open window shutter 1 at 50%?

Also there is a link to purchase 10 pcb at 21$ is the the complete solution (plug &play, including relays, connectors,,,) or is it just the board and do i need to solder everything my self?

Thank you and great job at doing this! :)

[gohan]

You still need to get parts and solder everything together.

[hitech2207]

Hi,

Where could i buy a finished version of this hardware?

[alexsh1]

@hitech2207 I do not think it is for sale as a finished product.
You still have to get everything assembled as @gohan had.

EDIT: re amazon echo or any other control can be done from RPi hosting a controller.

[artipi]

Hello, nice Node! How to order a NRF Version? If i click buy, i have no choice.

[Soloam]

I'm having difficult finding the IC4 ACS712_5A, if I search for "ACS712 5A" I only get the assembled unit. Can I get one of this and unsolder the IC and use it?

[berkseo]

@soloam said in 💬 Roller Shutter Node:

I'm having difficult finding the IC4 ACS712_5A, if I search for "ACS712 5A" I only get the assembled unit. Can I get one of this and unsolder the IC and use it?

ali

https://ru.aliexpress.com/item/ACS712-ACS712ELCTR-05B-ACS712TELC-05B/32789439410.html
https://ru.aliexpress.com/item/-/32875918012.html
https://ru.aliexpress.com/item/2-ACS712ELCTR-05B-T-ACS712T-SOP8-ACS712-SMD/32846519263.html
https://ru.aliexpress.com/item/10-ACS712ELCTR-05B-T-SOP8-ACS712T-ACS712-SMD/32850751652.html
https://ru.aliexpress.com/item/Pengiriman-gratis-10PCS-ALLEGRO-ACS712-ACS712T-ACS712ELCTR-ACS712ELCTR-05B-5A-5V-BI-8-SOIC-CURRENT-SENSOR/32437115332.html

ebay

https://www.ebay.com/itm/10pcs-New-ACS712TELC-05B-ACS712ELCTR-05B-T-ACS712ELCTR-05B-ALLEGRO-5A-SOP-8/281749030375?hash=item41998d05e7:g:7DAAAOSwu4BVpLn2
https://www.ebay.com/itm/1pcs-New-ACS712TELC-05B-ACS712ELCTR-05B-T-ACS712ELCTR-05B-ALLEGRO-5A-SOP-8/281749029814?hash=item41998d03b6:g:7DAAAOSwu4BVpLn2
https://www.ebay.com/itm/ACS712ELCTR-05B-T-Hall-Effect-High-Current-Sensor-159A/263615518167?hash=item3d60b595d7:g:hy8AAOSw6oBXEeIH
https://www.ebay.com/itm/1PC-ACS712T-ACS712ELCTR-05B-T-SOP8-Current-Sensor/183172053171?hash=item2aa5e7b8b3:g:OdYAAOSwNuVazHfK
https://www.ebay.com/itm/1PCS-IC-ALLEGRO-SOP-8-ACS712ELCTR-05B-T-ACS712TELC-05B-ACS712ELCTR-05B/162781088118?hash=item25e6824976:g:CUkAAOSwR2RaH452
https://www.ebay.com/itm/1PCS-New-ACS712TELC-05B-ACS712ELCTR-05B-T-ACS712ELCTR-05B-SOP-8-ALLEGRO-5A/332667654422?hash=item4d74899116:g:omAAAOSwvjBbDaVY
https://www.ebay.com/itm/5pcs-ACS712T-ACS712ELCTR-05B-T-SOP-8-Hall-Effect-Based-Linear-Current-Sensor/253838051714?hash=item3b19ed4982:g:KFYAAOSw6gRbhjes

you can unsolder, I have repeatedly had to do so))

by the way will share subtlety, in order to get good data from the sensor signal to untie from MCU. Then you forget about noise, electromagnetic interference and so on...

[scalz]

@soloam said in 💬 Roller Shutter Node:

I'm having difficult finding the IC4 ACS712_5A, if I search for "ACS712 5A" I only get the assembled unit. Can I get one of this and unsolder the IC and use it?

weird because it's easy to find on aliexpress/ebay like berkso said, or unsolder it it's easy. you can also find it on arrow, digikey.
for rollershutter mode, no need of very precise data, as it's used as a "switch" sensor, and my sketch, adc sampling/basic filtering etc are using state machine if i remember well, so nothing blocking. there is also available footprints for filtering if needed.
but if you don't have any Ic, you still can use the board, just take a look at the defines in sketch and proceed a manual calibration.
enjoy :)

[jeremushka]

My current roller roller Shutter switch are two pushed buttons up and down. No stop button. When release the push button up or down, the shutter will stop. WIll it be compatible with this board or will i have to change the buttons ?

[aramko aramko]

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