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by Massi
Fri Jun 06, 2014 12:59 pm
Forum: Beginners
Topic: USB irda dongle
Replies: 21
Views: 6013

Re: USB irda dongle

Ok, all is wrong, it seems to me that the emitter is modulating at 38kHz :( and more than this i'm not sure it has a transistor to give some juice to the led..
that's not good :(
by Massi
Fri Jun 06, 2014 12:25 pm
Forum: Beginners
Topic: USB irda dongle
Replies: 21
Views: 6013

Re: USB irda dongle

eventually, i got one of these http://www.arduiner.com/2419-large_default/1-Channel-IR-transmitter-module.jpg i've not a receiver, but i have an emitter LOL So, can i assume a pullup is not needed using the internal pullup of the PI? (i still have not the datasheet of the emitter..) Then i'll try to...
by Massi
Tue Jun 03, 2014 3:17 pm
Forum: Beginners
Topic: USB irda dongle
Replies: 21
Views: 6013

Re: USB irda dongle

OK, well it has a 33kHz filter, so it's in the range you want, assuming the Daikin is indeed running with 32kHz modulation. Hooking it up to the Pi shouldn't be too hard. I'll look at the datasheet later. i'm expecting it to work in this way https://learn.adafruit.com/ir-sensor/using-an-ir-sensor i...
by Massi
Mon Jun 02, 2014 2:14 pm
Forum: Beginners
Topic: USB irda dongle
Replies: 21
Views: 6013

Re: USB irda dongle

and what about a TSOP1133
http://pdf.datasheetcatalog.com/datashe ... 097_DS.pdf
can i link this directly to the pi or am i missing some resistors here and there? :)

thanks a lot ame!
by Massi
Mon Jun 02, 2014 1:11 pm
Forum: Beginners
Topic: USB irda dongle
Replies: 21
Views: 6013

Re: USB irda dongle

let's say something like this :)
https://learn.adafruit.com/ir-sensor/overview

it says "from 35 to 41", damn.. 32 is far :)
and i can't find similar receiver for 32kHz modulation..
Ok, i'll try :)
by Massi
Mon Jun 02, 2014 12:55 pm
Forum: Beginners
Topic: USB irda dongle
Replies: 21
Views: 6013

Re: USB irda dongle

I thank you a lot :)
This is so clear that i have to ask you one more thing: how a 32kHz modulated message can be received by a 38kHz receiver?

incredibly the emission part seems easier :)
by Massi
Mon Jun 02, 2014 11:53 am
Forum: Beginners
Topic: USB irda dongle
Replies: 21
Views: 6013

Re: USB irda dongle

The transmitter does have a driver transistor on-board (it's Q1). There is no schematic, but I wouldn't expect any surprises. Ok, so we have a transmitter :) The receiver has a pre-assembled module tuned to 38kHz, so the caveats above apply (it might not work as the Daikin carrier frequency is alle...
by Massi
Mon Jun 02, 2014 8:56 am
Forum: Beginners
Topic: USB irda dongle
Replies: 21
Views: 6013

Re: USB irda dongle

Hello guys, do you think something like this http://www.dx.com/p/produino-ir-transmitter-module-for-arduino-blue-works-with-official-arduino-boards-288657#.U4w7b_l_tgo can be driven by my raspberry without breaking it? i cannot see a proper transistor on that board, but there's a VCC pin and a signa...
by Massi
Sun Jun 01, 2014 6:20 am
Forum: Beginners
Topic: Getting started on garden irrigation automation
Replies: 6
Views: 1173

Re: Getting started on garden irrigation automation

check valve type. If you have "simple" valves, you can use one relay for each valve and control them in this way. I'm doing something similar, but i have a "irrigation computer" from gardenia and it's valve is not that simple: to open up, it needs SOME voltage, to close it needs ANOTHER voltage, so ...
by Massi
Sun Jun 01, 2014 6:14 am
Forum: Beginners
Topic: USB irda dongle
Replies: 21
Views: 6013

Re: USB irda dongle

Hi, i think i've managed to get a usb irda dongle to work. i'd like to manage output (and input) and timings to be able to decode my daikin AC protocol IrDA is incompatible with Daikin AC protocol (or better: Daikin AC protocol is not compatible with IrDA). Best wishes, Ivan Zilic. why? daikin remo...
by Massi
Sat May 31, 2014 8:09 pm
Forum: Beginners
Topic: USB irda dongle
Replies: 21
Views: 6013

USB irda dongle

Hi all, i think i've managed to get a usb irda dongle to work. But now i've a question: how can i manage "bit by bit" input and output from the interface? i'd like to manage output (and input) and timings to be able to decode my daikin AC protocol, but i have to admit that LIRC faq are scaring me (i...
by Massi
Fri May 09, 2014 1:39 pm
Forum: Automation, sensing and robotics
Topic: Distance sensor..
Replies: 20
Views: 3509

Re: Distance sensor..

looking at the chip datasheet you have a minimum Vref of 1.6v (page17, VRef min = Vdd +1.6). Yes, but if on the board Vdd and Vref are together i think i can't go under 2,5V (minimum supply), so 3,3 from raspberry is not far and a resistive partitor to go back to 2.5 is only loosing time (and curre...
by Massi
Fri May 09, 2014 12:41 pm
Forum: Automation, sensing and robotics
Topic: Distance sensor..
Replies: 20
Views: 3509

Re: Distance sensor..

variable resistor monitoring awning angle / distance, the resistance feedback will tell you how far open the awning is. (feedback through an Analogue to digital converter) this is so easy that i didn't even think to that :) i'd like to know if close to maximum extension is there enough resolution t...
by Massi
Fri May 09, 2014 9:57 am
Forum: Automation, sensing and robotics
Topic: Distance sensor..
Replies: 20
Views: 3509

Distance sensor..

Hi all, i'm trying to understand if a sensor exists that can tell to my raspberry "how much" my awnings have moved.. how much they are opened.. It should be something like a mouse sensor with only one direction possibile, and for sure it can be only "relative" if i track the rotation of the drive sh...
by Massi
Fri May 02, 2014 4:08 pm
Forum: General discussion
Topic: Analog or Digital on long distances
Replies: 18
Views: 5831

Re: Analog or Digital on long distances

You might also find out that a "star topology" (each I2C device has dedicated wires connected to junction at RasPi) has also very different properties related to "bus topology" where you have a single bus wires with I2C devices attached to it. so is it better to join all I2C wires "sensor side" tha...
by Massi
Fri May 02, 2014 1:58 pm
Forum: General discussion
Topic: Analog or Digital on long distances
Replies: 18
Views: 5831

Re: Analog or Digital on long distances

2. If our goal is to find out how much we can push I2C over its standard boundaries (this might be very interesting discussion), then we're hijacking this thread. this would be interesting indeed :) i'm going to connect some sensors (let's say 5) from outdoor (let's say 20 meters). some of them are...

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