Roller Shutter
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@hek thank you! yes it would be coool.
It is not tested yet. I need to test it before send to fabhouse.
For detecting, I am thinking about sensing current consumption on motor. I hope acs712 will be do the job (I think with 610mv/A, it could handle small 90w motor, i should have something like 120 on adc...). If people have best ideas...
For detection:- reset : up until end stop detected.
- then calibration begins : start timer and down until end stop. Get the down travel time.
- then start timer and up until end stop. Get the up travel time.
- you can do another time and abs.
- then store in eeprom
To start calibration : button sequence or v_light command
And V_DIMMER to set your roller shutter with sunlight, temperature...
I think, it will need some adjustments (if the motor have a capa, relay response...).
I am a little disappointed because i was hoping to make something smaller but i would like to stay simple for others (mini pro, 1206 size...). and transfo takes place too! But it stays 5x5 ratio so cheap at fabhouse.
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@scalz , wonderful project, thanks for the initiative! With minor changes the board can also be used as a "mysensor dual-relay" (within consumption meeter) --- It is really very nice!
One suggestion so far, maybe an Resistor-Capacitor "Snubber" between relay contacts, in order to prevent relay DC Arc?
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@rvendrame : I was thinking about dual relay too! Good idea for the snubber, thank you. I did not think about this even I saw it in a datasheet yesterday, argh, my lack of knowledge (I have not some automatics yet). So I am happy to show you for this. I will check for the snubber and hope it will find its place! I missed some creepage too. and will add a capa near my adc.
if it can help people, I am more than happy! -
So, here my files (need to be tested) : https://github.com/scalz/MySensors-HW/tree/development/RollerShutterNode_small
Now I will work on my sketch and release when all will be ok. -
@tbowmo : I agree with you. and I was thinking to do like this. But if I had choosen this way, I would have used 0805 (but not under, it makes me nervous, lol) and maybe using lnk306 or tny to have compact transfo. So it would be less fun for those who just want to take files and are not friend with soldering. So I have 1206 (easy to soldier), and you are right there are some small ics but just a few... But it's sure, those who take files knows soldering I think.
Humm, you are tempting me to try to make it smaller version but I have others projects..You are right it could be smaller...I will see.
Thank you , I'm very interested with your feedback. I am learning a lot here.
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@rvendrame: exactly, I saw my mistake today. I will update files soon.
@tbowmo: thank you for advice. next time I will think about it.
For mysensors kicad project, wow, thank you for the link. team mysensors is making a great work. I noticed last weeks there is a kicad movement.
Too bad I started to learn Eagle some months ago and I am just starting to like it. What I like too with eagle is lots of libs, and that I can get some footprints at farnell. But in other hand when I see all of your projects with 3d rendering, it is very hard to not have a look. And kicad is opensource...and if I can contribute.. -
I updated screenshots and my github files. Now I think it can handle 12-220v motors. I had to change screw terminals (it was 5mm before, 3.5 now, i hope it is good). I have no place for capa snubber (too big unfortunately ) it will have to be external if needed. And I removed fuse too. Because it could change if 24v or 220v motor (not same current for 90w-24V and 90W-220v) and it is not easy to place it. So it will have to be external too if needed.
In case using 220v motors, now it needs to tie together Source and 12_220(Live) at the screw terminals.
I will see if I can make it better and smaller in the future (to put it in wall) and designed with kicad:wink:
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Hi,
So, I tried to reduce size board to be able to fit in wall. I thought about using switching ic or to use sealed ac dc step down. not very easy choice but I keep the sealed (for galvanic protection), because I think it should not gain so much space finally and sw ic is more expensive to use. RFs footprints, atmel, eeprom... takes place too.
Here is how it looks for the moment. I just tried 3d for eagle to see so 3d rendering not complete.
It is 42x43mm
Top: power, relay, ldo reg, eeprom, ftdi connector.
Bottom: atmel, atsha, acs712, nrf smd & rfm footprint
it is almost 0805 (i am just seeing I missed 2diodes).
But as you can see there is no snubber? I am thinking to add a capa only. Do you have a good not expensive ref smd that I can put on bottom.??
And there is no AVRSPI connector for the moment I need to find a little place for it, not easy.
Any remarks?See you soon
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@Fabien @tbowmo: thank you very much for your feedback.
So no tracks under the chip, or on the other plane? Arrgh, I will try. Is it related to nrf because on moteino designs it seems rfm don't care about it? Anyway I don't want to have problems. I don't know how I will do that but I will see this evening.Last night, I added spi for programmer so it's cool. I found capa for snubber but 2220 size...And for small SSR, I thought about it but the board must handle 12/24v motors too so current won't be the same and small SSR won't like that. That is why I choosed these relays. I want to be able to handle 12/24 and 220v so the board would be useful for lots of application.
I was lazy to move to kicad but I will move for sure :flushed: -
@fabien: so not under chip, but other side of board is ok i think? Anyway, I think I will have to do some reroute. Not easy. I am not electronician. I'm database soft archi. So I have not done lots of pcb yet. I am learning.. but at my job I played a lot with mikroelectronika even if I am not in charge to design pcb.
And I think I made a wrong choice with eagle (I saw lots of libs so I thought it would be easier. But I have to make lots of parts myself so...).
Here what I did last night : moved ant smd for rfm, spi connector, and 3d model for stepdown. Not a lot of things. And, tried to place snubber, but not good, clearance drc errors..I am thinking to add snubber externally.
Next screenshot I hope all will be ok :smiley:@tbowmo: which tools do you use to create 3d models for Kicad? I tried Sketchup yesterday but don't like interface as I usually use Solidworks at job when needed. Would be great if I could export Solidworks to kicad, I will see if it's possible..
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rfm modules have an external antenna, that is why they can be mounted like they do on moteino boards.
NRF modules incorporates an anteanna, and you need to keep the anteanna area (+ some space around it) clear of components and tracks. on both sides of the PCB. Otherwise they will interfere with the antenna radiation.
I use the build in 3D viewer in kicad. (Using almost bleeding edge of kicad on linux, with additions from CERN)
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@tbowmo: thank you for your explanation. So I think it is not a good news for me (nrf24) aaaaaaa I will loose my hairs on this:sweat_smile: even if I plan to use rfm, my brother have a lots of nrf24. I think he will need move to rfm. But I will try, big challenge for me.
For kicad, interesting info, thanks. -
@Fabien: I have an idea for nrf24 problem, maybe dumb I don't know.
- on bottom of nrf, paste piece of paper
- then add a piece aluminium sheet or anything else with a wire to connect it to gnd
- then paste another piece of paper
Do you think it could work? Or maybe antenna will not like the ground plane...
just ideas, in case.
