Re: [57north-discuss] [57north-announce] Tuesday!

[Tony Travis]

On 17/11/15 12:54, Doc Ocassi wrote:
> Hello Everyone.
> 
> It is Tuesday, you hear that, Tuesday,
> 
> You Know what to do.

Hi, Doc.

I'll be in having a look at Carl's Banana Pi, which I've now got running
Ubuntu and looking at the spec. of the Banana Pi router!

Bye,

  Tony.

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[57north-discuss] Missing component

[Tanev, Ventsislav]

Dear hackers,


I am a fourth year student at the University of Aberdeen doing Computing 
Science. I am working on a project regarding message payload and its relation 
to battery usage. I was going to simulate this with Arduino/Raspberry pi. The 
idea is to get sensor data and
1) form a character string with all the necessary information and pass it 
via Wifi(ESP8266) - this will result in lighter message, but it would require 
some parsing on the other side

2) construct and object and send it via Wifi - this will result in a 
heavier message, but it wont require parsing

I was originally hoping to measure the current consumption with a multimeter, 
but the current consumption might fluctuate too quick for me to register 
meaningful data. What I believe will work is to measure how much power will be 
consumed with a current sensor (ACS712) and log the data. However as I don't 
have such sensor and the estimated delivery for one is way past my deadline I 
was hoping that you guys have 1 I could borrow.


In all cases any feedback would be greatly appreciated []


Kind regards,

Ventsislav
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Re: [57north-discuss] Missing component

[Robert McWilliam]

On Tue, Nov 17, 2015, at 12:37, Tanev, Ventsislav wrote:
> I was originally hoping to measure the current consumption with a
> multimeter, but the current consumption might fluctuate too quick for
> me to register meaningful data. What I believe will work is to measure
> how much power will be consumed with a current sensor (ACS712) and log
> the data. However as I don't have such sensor and the estimated
> delivery for one is way past my deadline I was hoping that you guys
> have 1 I could borrow.


> In all cases any feedback would be greatly appreciated 


I think the current sensor chips are overkill for what you're doing
here (and the power changes you'll be looking at will be a few orders
of magnitude from what they're designed for so might be lost in the
noise): the devices you're looking at are powered by low voltage DC;
just put a known small resistor in the power line and measure the
voltage across it.

The (slightly more) complicated part will be logging the data. What kind
of time frame are you talking about for the building and sending the
message/object? I expect it's much shorter than you have any change of
getting with a multimeter, pencil and paper. I have a Red Pitaya[1] in
the space that I think would work for this. It could be set up to grab
voltage readings at whatever period is needed (well, probably: max
sample rate is 125MS/s) based on trigger on the other channel, then put
one channel over the resistor and the other to a button that's also
connected to the pi/arduino to trigger message building and sending. Can
have the data output to python or matlab (or some other places) for
further processing.

Robert

[1]http://redpitaya.com/

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Re: [57north-discuss] [57north-announce] Tuesday!

[Hibberd, Dave]

It is Tuesday, you hear that, Tuesday,


No, I won't talk, you can't force me!

Oh, alright. I'll be in and about probably, muttering about things, 
stuff and likely one or two other bits and bobs.


I'll be returning the Doc's possessions to the Doc, Probably ANSI 
art-ing for the BBS. I dunno what else, spending time with my friends 
and stuff.


Hx
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Re: [57north-discuss] [57north-announce] Tuesday!

[Mike O'Hagan]

Hi,
If I come along tonight - would someone be able to hrlp me how to a Fritzing 
part? - I have Fritzing & Inkscape and will bring the laptop.
(The Graphic LCD panel I have turns out to be type A - the one in Fritzing is 
type B - it only needs the pin labels rearranging and should be easy...but I am 
struggling!)

Regards,

Mike O'Hagan
079 200 90 260 


From: 57north-announce <57north-announce-boun...@lists.57north.co> on behalf of 
Doc Ocassi 
Sent: 17 November 2015 12:54
To: 57north-annou...@lists.57north.co
Subject: [57north-announce] Tuesday!

Hello Everyone.

It is Tuesday, you hear that, Tuesday,

You Know what to do.

Doc


--
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"Any sufficiently advanced technology is indistinguishable from magic."
 - Clarke's 3rd Law.

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Re: [57north-discuss] Missing component

[Robert McWilliam]

On Tue, Nov 17, 2015, at 17:00, Tanev, Ventsislav wrote:
> For the logging of data I was originally thinking of running a loop
> and constantly sending messages. Then measuring the current
> consumption with the multimeter and getting some average over 20 sec.


The big advantage of simplifying code is that you get to finish
doing work and go back into a sleep state quicker. If you put the
work in a loop you'll always be doing work so you wont get the low
power sleep state.

The advantage of the red pitaya over an arduino would be the much higher
temporal resolution so you can see more of the transient changes in
power usage. I think it's a bit easier to get the data off as well,  but
that could easily be negated if you already know how to do it with the
arduino but need to learn for the red pitaya.

Robert

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Re: [57north-discuss] Missing component

[Tanev, Ventsislav]

For the logging of data I was originally thinking of running a loop and 
constantly sending messages. Then measuring the current consumption with the 
multimeter and getting some average over 20 sec. The other option - with the 
current sensor would be to do a measurement every 50ms for 20 sec and send 
every measurement from the sensor over the serial to my laptop. I might be 
approaching this from the wrong side... I like the idea of using a button to 
build and send messages. I don't consider myself expert in electronics, but 
here is how I was envisioning this in my head (see attached 
ProjectDiagram.png). Arduino 3 would be used purely to utilize the current 
sensor. It would measure the current consumption of Arduino 1 then the current 
consumption on Arduino 2; hence the dashed lines.


Example setup and run (purely theoretical) for measuring current consumption on 
Arduino 2:


Arduino 3:

SETUP

set pin 11 as Output (Arduino 2 pin 12)

set pin 12 as Input (Arduino 2 pin 11)

LOOP

if some event (button press or input from Serial) occurs

set pin 11 to HIGH (to start Arduino 2)

start measuring current on Arduino 2


if pin 12 is HIGH

stop measuring current on Arduino 2

set pin 11 to LOW


Arduino 2:

SETUP
set pin 11 as Output (Arduino 3 pin 12)
set pin 12 as Input (Arduino 3 pin 11)
LOOP
if pin 12 is HIGH
read sensor data
construct message (character string or object depending on the method 
being tested)
send message
set pin 11 to HIGH
delay(?) not sure for synchronisation???
else
set pin 11 to LOW

Throwing this aside I must admit I'm not familiar with the functionality of Red 
Pitaya, but from what you've written it might work in place of Arduino 3 in my 
design.

Regards,
Ventsislav


From: Robert McWilliam 
Sent: 17 November 2015 13:47
To: Tanev, Ventsislav; 57north-discuss@lists.57north.co
Subject: Re: [57north-discuss] Missing component

On Tue, Nov 17, 2015, at 12:37, Tanev, Ventsislav wrote:

I was originally hoping to measure the current consumption with a multimeter, 
but the current consumption might fluctuate too quick for me to register 
meaningful data. What I believe will work is to measure how much power will be 
consumed with a current sensor (ACS712) and log the data. However as I don't 
have such sensor and the estimated delivery for one is way past my deadline I 
was hoping that you guys have 1 I could borrow.

In all cases any feedback would be greatly appreciated [??]

I think the current sensor chips are overkill for what you're doing here (and 
the power changes you'll be looking at will be a few orders of magnitude from 
what they're designed for so might be lost in the noise): the devices you're 
looking at are powered by low voltage DC; just put a known small resistor in 
the power line and measure the voltage across it.

The (slightly more) complicated part will be logging the data. What kind of 
time frame are you talking about for the building and sending the 
message/object? I expect it's much shorter than you have any change of getting 
with a multimeter, pencil and paper. I have a Red Pitaya[1] in the space that I 
think would work for this. It could be set up to grab voltage readings at 
whatever period is needed (well, probably: max sample rate is 125MS/s) based on 
trigger on the other channel, then put one channel over the resistor and the 
other to a button that's also connected to the pi/arduino to trigger message 
building and sending. Can have the data output to python or matlab (or some 
other places) for further processing.

Robert

[1] http://redpitaya.com/

--
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Cleverly disguised as a responsible adult.

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Re: [57north-discuss] [57north-announce] Tuesday!

[Neil Pilgrim]

I shall be along, probably working on my latest ESP-01 board, possibly
making dinging noises, making lua noises, and maybe mapping.

Mike: I'm using Fritzing, but also haven't yet got to the stage of
rejigging parts, at least not entirely successfully yet. So, interested to
discuss it and see what can be done!

--
Neil


On 17 November 2015 at 15:25, Mike O'Hagan  wrote:

> Hi,
> If I come along tonight - would someone be able to hrlp me how to a
> Fritzing part? - I have Fritzing & Inkscape and will bring the laptop.
> (The Graphic LCD panel I have turns out to be type A - the one in Fritzing
> is type B - it only needs the pin labels rearranging and should be
> easy...but I am struggling!)
>
> Regards,
>
> Mike O'Hagan
> 079 200 90 260
>
> 
> From: 57north-announce <57north-announce-boun...@lists.57north.co> on
> behalf of Doc Ocassi 
> Sent: 17 November 2015 12:54
> To: 57north-annou...@lists.57north.co
> Subject: [57north-announce] Tuesday!
>
> Hello Everyone.
>
> It is Tuesday, you hear that, Tuesday,
>
> You Know what to do.
>
> Doc
>
>
> --
> Doc Ocassi
> Email: dococa...@boukom.com
> GPG Fingerprint: 4A71 BB35 A6D1 6F85 9DF8  4CD2 E58E 4715 6153 AAA8
>
> "Any sufficiently advanced technology is indistinguishable from magic."
>  - Clarke's 3rd Law.
>
> ___
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>
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Re: [57north-discuss] Missing component

[Doc Ocassi]

Hello Ventislav

I believe I have one of these.
https://www.sparkfun.com/products/8882

Though I will have to where it is and exactly what it is, it is a hall
effect, I will be at the space tonight.

Doc

On 17/11/15 12:37, Tanev, Ventsislav wrote:
> Dear hackers,
> 
> 
> I am a fourth year student at the University of Aberdeen doing Computing
> Science. I am working on a project regarding message payload and its
> relation to battery usage. I was going to simulate this with
> Arduino/Raspberry pi. The idea is to get sensor data and
> 1) form a character string with all the necessary information and
> pass it via Wifi(ESP8266) - this will result in lighter message, but it
> would require some parsing on the other side
> 
> 2) construct and object and send it via Wifi - this will result in a
> heavier message, but it wont require parsing
> 
> I was originally hoping to measure the current consumption with a
> multimeter, but the current consumption might fluctuate too quick for me
> to register meaningful data. What I believe will work is to measure how
> much power will be consumed with a current sensor (ACS712) and log the
> data. However as I don't have such sensor and the estimated delivery for
> one is way past my deadline I was hoping that you guys have 1 I could
> borrow. 
> 
> 
> In all cases any feedback would be greatly appreciated 
> 
> 
> Kind regards,
> 
> Ventsislav
> 
> 
> 
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> 

-- 
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Email: dococa...@boukom.com
GPG Fingerprint: 4A71 BB35 A6D1 6F85 9DF8  4CD2 E58E 4715 6153 AAA8

"Any sufficiently advanced technology is indistinguishable from magic."
 - Clarke's 3rd Law.



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Re: [57north-discuss] [57north-announce] Tuesday!

[Tom Jones]

On Tue, Nov 17, 2015 at 12:54:31PM +, Doc Ocassi wrote:
> Hello Everyone.
> 
> It is Tuesday, you hear that, Tuesday,
> 
> You Know what to do.

Wooo!

Wait, what do I put here?

Tomorrow being the third Wednesday of the month also means that it is
TechMeetUp. In fact it is the last TechMeetUp of the year!

Tomorrow we are running lightning talks, lightning talks are not given
by lightning(that would be thunder), but are 5 minute opportunites where
any one can jump up and ramble for 5 minutes. Only 5 minutes mind you,
there will be boos if you go over.

Tonight, I will be creating slides for my talk tomorrow(is a sekret)
and when that is boring I will be trying to get a pi to speak to one of
those cctv monitors.

Does anyone know if we have composite cables in the space?

- [tj]
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Re: [57north-discuss] [57north-announce] Tuesday!

[Dave]

No, I wasn't aware of this however it could be very beneficial to us. I'll not 
make it along in time, sadly.

The closing date is November 30th, I'll put in some calls for advise from my 
sekrit societies and get an application in before then with the other directors.

Andy, you're always down with the kids and hip to the groove, don't let anyone 
tell you otherwise.

Hx


On 17 November 2015 18:18:55 GMT+00:00, Andy Gaskell  wrote:
>I'll be heading down a bit later.
>
>Is anyone going to the meeting about the Creative Spaces Project at the
>The
>Anatomy Rooms in Marischal College just now?  There is maybe funding
>and
>space  available for groups like ours.
>
>Info at
>http://www.aberdeencity.gov.uk/community_life_leisure/arts/culture/Creative_Spaces.asp
>
>Maybe worth someone popping across, just and idea.  I'd go, but am down
>with the kids until about 8pm when the mrs get home.
>
>Cheers
>
>Andy
>
>
>
>On 17 November 2015 at 17:30, Neil Pilgrim <5...@kepier.clara.net>
>wrote:
>
>> I shall be along, probably working on my latest ESP-01 board,
>possibly
>> making dinging noises, making lua noises, and maybe mapping.
>>
>> Mike: I'm using Fritzing, but also haven't yet got to the stage of
>> rejigging parts, at least not entirely successfully yet. So,
>interested to
>> discuss it and see what can be done!
>>
>> --
>> Neil
>>
>>
>> On 17 November 2015 at 15:25, Mike O'Hagan 
>> wrote:
>>
>>> Hi,
>>> If I come along tonight - would someone be able to hrlp me how to a
>>> Fritzing part? - I have Fritzing & Inkscape and will bring the
>laptop.
>>> (The Graphic LCD panel I have turns out to be type A - the one in
>>> Fritzing is type B - it only needs the pin labels rearranging and
>should be
>>> easy...but I am struggling!)
>>>
>>> Regards,
>>>
>>> Mike O'Hagan
>>> 079 200 90 260
>>>
>>> 
>>> From: 57north-announce <57north-announce-boun...@lists.57north.co>
>on
>>> behalf of Doc Ocassi 
>>> Sent: 17 November 2015 12:54
>>> To: 57north-annou...@lists.57north.co
>>> Subject: [57north-announce] Tuesday!
>>>
>>> Hello Everyone.
>>>
>>> It is Tuesday, you hear that, Tuesday,
>>>
>>> You Know what to do.
>>>
>>> Doc
>>>
>>>
>>> --
>>> Doc Ocassi
>>> Email: dococa...@boukom.com
>>> GPG Fingerprint: 4A71 BB35 A6D1 6F85 9DF8  4CD2 E58E 4715 6153 AAA8
>>>
>>> "Any sufficiently advanced technology is indistinguishable from
>magic."
>>>  - Clarke's 3rd Law.
>>>
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>>>
>>
>>
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>>
>>
>
>
>-- 
>Andy Gaskell
>Head Developer
>Software Systems: Open For Business
>Email: a...@ssofb.co.uk
>Web: http://www.ssofb.co.uk
>Mobile: 07745 924 449
>Office: 01224 312857
>Skype: andy_at_ssofb
>LinkedIn: http://www.linkedin.com/in/agaskell
>Office: 40 Raeden Park Road, Aberdeen, AB15 5LQ.
>Limited company: SC347800
>
>
>
>
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[57north-discuss] odroid xu4, anyone wanting one less than rrp?

[Andy Gaskell]

Hiya

Was anyone planning on buying an Odroid XU4?

I've got one spare, and was going to return it, but just wanted to check if
anyone wanted it.

It's a beast of an mini sbc, see
http://www.hardkernel.com/main/products/prdt_info.php for details.  I tried
it with Linux and Android and it works nicely.  It'd make a good media
server, media player or NAS thing, as it has 2xGigEth and USB3.  I think,
on paper it's faster than all the computers in our house/office, except for
the mrs' new i5 laptop.

So, I bought it from http://lilliputdirect.com for £74 inc PSU, and a case
for £5, with shipping on top.

If anyone wants it £50 or so, with the case, let me know.

I know it's not so exciting, like being free or half price, sorry.  It's
just they have a 25% return fee, plus postage, so £50 is kind of what I'll
get back if I return it.

Thought it might possibly be handy, on the off-chance, to ask.  Email me or
catch me in the space later this eve.

Cheers

Andy


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Head Developer
Software Systems: Open For Business
Email: a...@ssofb.co.uk
Web: http://www.ssofb.co.uk
Mobile: 07745 924 449
Office: 01224 312857
Skype: andy_at_ssofb
LinkedIn: http://www.linkedin.com/in/agaskell
Office: 40 Raeden Park Road, Aberdeen, AB15 5LQ.
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[57north-discuss] odroid xu4, anyone wanting one less than rrp?

[Andy Gaskell]

> Hiya
>
> Was anyone planning on buying an Odroid XU4?
>
> I've got one spare, and was going to return it, but just wanted to check
if anyone wanted it.
>
> It's a beast of an mini sbc, see
http://www.hardkernel.com/main/products/prdt_info.php for details.  I tried
it with Linux and Android and it works nicely.  It'd make a good media
server, media player or NAS thing, as it has 2xGigEth and USB3.  I think,
on paper it's faster than all the computers in our house/office, except for
the mrs' new i5 laptop.
>
> So, I bought it from http://lilliputdirect.com for £74 inc PSU, and a
case for £5, with shipping on top.
>
> If anyone wants it £50 or so, with the case, let me know.
>
> I know it's not so exciting, like being free or half price, sorry.  It's
just they have a 25% return fee, plus postage, so £50 is kind of what I'll
get back if I return it.
>
> Thought it might possibly be handy, on the off-chance, to ask.  Email me
or catch me in the space later this eve.
>
> Cheers
>
> Andy
>
>
> --
> Andy Gaskell
> Head Developer
> Software Systems: Open For Business
> Email: a...@ssofb.co.uk
> Web: http://www.ssofb.co.uk
> Mobile: 07745 924 449
> Office: 01224 312857
> Skype: andy_at_ssofb
> LinkedIn: http://www.linkedin.com/in/agaskell
> Office: 40 Raeden Park Road, Aberdeen, AB15 5LQ.
> Limited company: SC347800
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