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drewibbo
Posts: 41
Joined: Tue Feb 26, 2013 11:54 am
Location: Worthing, UK
Contact: Website

Cress-Growing Timelapse

Sat May 18, 2013 1:36 pm

I need to begin this post by saying that one good thing has come from McDonald's… (at last). Me and my son, Camden were having a treat one evening and in his Happy Meal was, what I thought to be, the usual annoying, useless toy. Not this time! This time he had received a cress growing kit. Yes! You did read correctly, A cress growing kit.

Instantly I thought… Raspberry Pi… My timelapse script and some lego…!
WP_20130518_001.jpg
WP_20130518_001.jpg (49.42 KiB) Viewed 1143 times
The project began on 18th May 2013 and the raspberry Pi is capturing images every ten minutes. You can view the latest snapshot on my Pi hosted site: http://drewibbo.no-ip.biz/worthingwatch/cresswatch.php

I used the lego to make a nice little resting place for the supplied greenhouse and to hold my Logitech HD Webcam in place. I had a bit of trouble watering the cress seeds on the first run and managing to keep the greenhouse in the same position.

You may notice that the webcam has a pair of “glasses”. This is due to the fixed focus. Without it I would need to place the camera about 1/2 meter from the cress seeds which meant that we would not be able to see anything.

I had read on the t’internet that by using a pair of magnifying reading glasses you could use the webcam at closer distances. With my 20/20 sight I have never needed to use glasses so set about trying to find something else to use instead. I spent about an hour searching the house when I came across my Celestron PowerSeeker telescope. I found the perfect lens to use on the attached viewfinder. I have no idea what focal length it has i’m afraid though. But it works perfectly meaning that I could place the camera about 20cm from the greenhouse… perfect!

The project began on 18th May 2013 and the raspberry Pi is capturing images every ten minutes. You can view the latest snapshot on my Pi hosted site: http://drewibbo.no-ip.biz/worthingwatch/cresswatch.php

When the cress has finished growing I will produce a time lapse video and post the link here.
Pi Pi Pi...

richardp
Posts: 117
Joined: Thu Jan 12, 2012 11:46 am

Re: Cress-Growing Timelapse

Sat May 18, 2013 1:47 pm

Nice one! Are the cress growing in a constant light? Or is there an infrared light source so that night-time activities can be observed? Webcams are good in the infrared spectrum.

Richard
RaspberryPi's galore
Solid run CuBox
ODroid U2

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drewibbo
Posts: 41
Joined: Tue Feb 26, 2013 11:54 am
Location: Worthing, UK
Contact: Website

Re: Cress-Growing Timelapse

Sat May 18, 2013 3:21 pm

richardp wrote:Nice one! Are the cress growing in a constant light? Or is there an infrared light source so that night-time activities can be observed? Webcams are good in the infrared spectrum.

Richard
Thanks Richard.

I'm afraid there is no posh technology going into this.
it is just sat on the windowsill trying to find some good old English sun... :lol:
Pi Pi Pi...

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ukscone
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Re: Cress-Growing Timelapse

Sat May 18, 2013 3:59 pm

i hope it's not to closer to your router otherwise you'll be filming for a very long time :)

http://science.slashdot.org/story/13/05 ... ar-routers

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drewibbo
Posts: 41
Joined: Tue Feb 26, 2013 11:54 am
Location: Worthing, UK
Contact: Website

Re: Cress-Growing Timelapse

Sat May 18, 2013 4:16 pm

ukscone wrote:i hope it's not to closer to your router otherwise you'll be filming for a very long time :)

http://science.slashdot.org/story/13/05 ... ar-routers
Luckily I have a wireless dongle and my router is at least 5 meters away.

Poor cress :lol:
Pi Pi Pi...

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