Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.

Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).

💬 "Drömsyn" Weather prediction lamp

openhardware.io last edited by openhardware.io

https://www.openhardware.io/view/743/Dromsyn-Weather-prediction-lamp
Reply Quote 1
1 Reply Last reply
skywatch last edited by @openhardware.io

@openhardware-io That looks great! - Perhaps they could make a version for the UK market called "regnsyn" ??? ;0
Reply Quote 1
1 Reply Last reply

2
Posts

184
Views

Suggested Topics

💬 Homini Pulse Meter Monitor
OpenHardware.io • mysensors contest2017 power pulse homini power consumption pulse sensor power monitor • • openhardware.io

13

1
Votes

13
Posts

3242
Views

Testing and updating can resume now my first year at university has finished and I now have 4 months worth of MySensors development to get started on!
💬 Wall Socket Insertable Node
OpenHardware.io • mysensors rfm69 relay atsha204a power supply • • openhardware.io

77

4
Votes

77
Posts

23948
Views

@yury said in Wall Socket Insertable Node: Looks cool! Do you have experience with capacities switches? I did not play much with them. afraid to use close to AC interference though... You need to use a capacitive IC with active shielding, basically you have an extra electrode around your touch electrode and the touch IC will compare capacitive change of the touch electrode with capacitive change from the shield electrode. If the change is due to electrical interference then both electrodes will be changed in a similar way and the IC will not trigger.
💬 MDMSGate
OpenHardware.io • mysensors gateway nrf24l01 rfm69 esp8266 atsha204a ethernet atmega328 usb mysensors gateway • • openhardware.io

82

2
Votes

82
Posts

27499
Views

Hi @berkseo. Thanks for the suggestion, but could you describe in more detail? As for my TODO list, there is already a task to add 485 interface to the gateway. My latest device "xRoom" have this interface. ps/ Where have you gone? I have been working on "xRoom" shield. A small announce: Do you remember the discussion about multinode? So, it will be available soon))
💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1_Ver_C2)
OpenHardware.io • mysensors livolo • • openhardware.io

47

1
Votes

47
Posts

13470
Views

Hello all, I studied a little bit more this part of the circuit and it's a standard self oscillating flyback converter or a ringing choke converter as others call it. Indeed it provides the most compact solution for space constrained designs. But all of this comes at a cost: it's difficult to obtain a stable circuit and it has to be tuned by trial and error - at least this is what the literature says. I'm not a switching power supplies expert here(even though I want to learn more about SMPS's in general but my time is limited for now) but I've come to a conclusion: it's difficult to tune this or to change the existing circuit to accommodate the mysensors circuits power requirements. I tried various combinations using sleep schemes and to change the flyback converter components as other mentioned in the mysensors forum and indeed I can power up my custom design that is presented in this thread BUT it's NOT STABLE. From time to time the switching transistor(mje13003) burns out and this is because I removed the resistor placed at the input of this power supply - near the bridge rectifier and replaced it with a wire(this is not the same resistor as @Lukaspp replaced from the base of the transistor which is the startup resistor for the flyback converter). Now the only purpose that I imagine for this resistor is to suppress the transients - but it has a big value(100Kohm) which limits the current to a non-usable value for our purpose. I know that there are other solutions to overcome the transients but they are either bulky or too slow for this(correct me if I'm wrong here). More than that let's not forget that we have 2 power supplies here and when the lights go on the first supply(flyback) input gets shorted by the relays contact(I have the relays variant btw not the one with triac) so I'm thinking that other transients appear here as the primary inductor doesn't like that as far as I know - so I assume the above mentioned resistor of 100Kohm comes into play here too. Another role for it would be to limit the inrush currents. I played with that value too but it needs to be very low to have something stable and I got a value around 200ohms but that doesn't help as it's too low and after some time the resistor burned up and saved my transistor :simple_smile: . Now with all the tricks in the world and tuning the flyback converter to give more current this won't help as again let's not forget we have a SERIES circuit here so without external intervention we can't achieve that(only if we break somehow the laws of physics or maybe my thinking is limited :simple_smile: ). In this case the external capacitor placed across the light bulb comes into play to supply enough current to the standby circuit which is our flyback converter over here. I played with that one too and from 0,47uF I got to 4.7uF to have a decent result - but this one gets bulky and more expensive from obvious reasons. And let's not forget that the light bulb itself has some impact overall because this is the actual LOAD that we want to control and there are various light bulbs over there with various requirements. More than that they have their power supply embedded which in most of the cases is a(you guessed maybe): a self oscillating FLYBACK CONVERTER or similar. So this one too has inrush currents, transients which are sensed down the line to our dear Livolo switch and affects my custom board stability again :simple_smile: - isn't life beautiful? :simple_smile: So far these are the results of my trials and none of them proved to be stable so I kinda gave up on this and will try to use a normal powering scheme somehow(as Sonoff switches with a battery powered touch switch on the wall). Not the best solution of all but this is what you get when the infrastructure wasn't thought for this scenarios from the beginning. The Livolo guys thought of all of this I assume so that's why they stayed only with a simple circuit - a PIC mcu which maybe sleeps most of the time and a simple radio receiver which draws around 5mA or even less - so yeah that's why this works and it's stable in its original form.
SCT-013-000 Calibration Value
General Discussion • mysensors • • Junior Ximenes

1

0
Votes

1
Posts

23
Views

No one has replied
Mother/daughter board system
OpenHardware.io • mysensors rfm69 leak • • openhardware.io

3

0
Votes

3
Posts

1410
Views

I've added all the files manually so things should be there now (though I'd recommend grabbing things from github to preserve directory structure and get all the files).
💬 NModule PIR sensor shield
OpenHardware.io • mysensors contest2017 pir nmodule am312 am612 • • openhardware.io

13

0
Votes

13
Posts

3376
Views

@Nca78 FWIW, I used 1.55mm holes. There may be no perfect diameter since we don't even know for sure yet which lens will turn out best.
💬 Dual Channel 0-10V Dimmer
OpenHardware.io • mysensors dimmer 0-10v • • openhardware.io

2

0
Votes

2
Posts

990
Views

Hi Mardah, how this the progress on this project related to the software and testing? kind regards

💬 "Drömsyn" Weather prediction lamp

Suggested Topics

💬 Homini Pulse Meter Monitor
OpenHardware.io • mysensors contest2017 power pulse homini power consumption pulse sensor power monitor • • openhardware.io

💬 Wall Socket Insertable Node
OpenHardware.io • mysensors rfm69 relay atsha204a power supply • • openhardware.io

💬 MDMSGate
OpenHardware.io • mysensors gateway nrf24l01 rfm69 esp8266 atsha204a ethernet atmega328 usb mysensors gateway • • openhardware.io

💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1_Ver_C2)
OpenHardware.io • mysensors livolo • • openhardware.io

SCT-013-000 Calibration Value
General Discussion • mysensors • • Junior Ximenes

Mother/daughter board system
OpenHardware.io • mysensors rfm69 leak • • openhardware.io

💬 NModule PIR sensor shield
OpenHardware.io • mysensors contest2017 pir nmodule am312 am612 • • openhardware.io

💬 Dual Channel 0-10V Dimmer
OpenHardware.io • mysensors dimmer 0-10v • • openhardware.io

37
Online

11.5k
Users

11.1k
Topics

112.7k
Posts

💬 "Drömsyn" Weather prediction lamp

Suggested Topics

💬 Homini Pulse Meter Monitor OpenHardware.io • mysensors contest2017 power pulse homini power consumption pulse sensor power monitor • • openhardware.io

💬 Wall Socket Insertable Node OpenHardware.io • mysensors rfm69 relay atsha204a power supply • • openhardware.io

💬 MDMSGate OpenHardware.io • mysensors gateway nrf24l01 rfm69 esp8266 atsha204a ethernet atmega328 usb mysensors gateway • • openhardware.io

💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1_Ver_C2) OpenHardware.io • mysensors livolo • • openhardware.io

SCT-013-000 Calibration Value General Discussion • mysensors • • Junior Ximenes

Mother/daughter board system OpenHardware.io • mysensors rfm69 leak • • openhardware.io

💬 NModule PIR sensor shield OpenHardware.io • mysensors contest2017 pir nmodule am312 am612 • • openhardware.io

💬 Dual Channel 0-10V Dimmer OpenHardware.io • mysensors dimmer 0-10v • • openhardware.io

37Online

11.5kUsers

11.1kTopics

112.7kPosts

💬 Homini Pulse Meter Monitor
OpenHardware.io • mysensors contest2017 power pulse homini power consumption pulse sensor power monitor • • openhardware.io

💬 Wall Socket Insertable Node
OpenHardware.io • mysensors rfm69 relay atsha204a power supply • • openhardware.io

💬 MDMSGate
OpenHardware.io • mysensors gateway nrf24l01 rfm69 esp8266 atsha204a ethernet atmega328 usb mysensors gateway • • openhardware.io

💬 RFM69 Livolo 2 channels 1 way EU switch(VL-C700X-1_Ver_C2)
OpenHardware.io • mysensors livolo • • openhardware.io

SCT-013-000 Calibration Value
General Discussion • mysensors • • Junior Ximenes

Mother/daughter board system
OpenHardware.io • mysensors rfm69 leak • • openhardware.io

💬 NModule PIR sensor shield
OpenHardware.io • mysensors contest2017 pir nmodule am312 am612 • • openhardware.io

💬 Dual Channel 0-10V Dimmer
OpenHardware.io • mysensors dimmer 0-10v • • openhardware.io

37
Online

11.5k
Users

11.1k
Topics

112.7k
Posts