2017-01-02 Leaf of my hydroponic coffee plant

Blogged by Twan as 2017 365 macro shots,Daily life,Photo — Twan Mon 2 Jan 2017 3:39 pm

2017-01-02 – Leaf of my hydroponic coffee plant


2017 Happy New Year – 365 macro shots challenge

Blogged by Twan as 2017 365 macro shots,Daily life — Twan Sun 1 Jan 2017 10:37 am

My challenge for 2017 is that I’m going to make a macro shot every day and post it here.

2017-01-01 – Peeled clementine skin


Deadly spider love

Blogged by Twan as Daily life — Twan Mon 14 Sep 2015 9:32 pm

Last weekend I could witness a brave male cross spider trying to impress a nice and big female.

Nice opportunity to try the new LED ring ‘flash’ 🙂




Macro virus

Blogged by Twan as Daily life,Photo — Twan Thu 27 Aug 2015 4:08 pm

Small things have been fascinating me for a long time. I love getting close and try to bring out the details that we normally don’t see or do not really pay attention to. Both under water and on land I have the need to shove a lens right up the nose of little creatures.

It’s quite a challenge to have enough light and to focus on these small things but sometimes, it works and when I look back at the picture on the computer I just think WOW!

I recently bought some Kenko extension tubes and have been wrestling with them together with my Canon 100mm.

Today I found this little jumping spider (Salticidae). It was a lot of fun trying to get him to smile at the camera ( and not jump on it ).


Playing with the camera

Blogged by Twan as Daily life,Photo — Twan Sun 9 Aug 2015 12:38 pm

I have been playing a bit with the magic lantern firmware for my camera (canon 60d). I tested the focus stacking on an orchid flower and used the trap focus feature to try to get a macro shot (100mm + Inon ucl 165) of a fly.

Pretty cool stuff! Definitely going to play some more with this.

2015-08-08-20.51.35 ZS PMax-Border


Dive pictures Lembeh, Indonesia

Blogged by Twan as Daily life,Diving,Gallery,Photo — Twan Sun 14 Jun 2015 7:49 am

I had a chance to go for another photography dive trip. Again Indonesia however, this time it was Lembeh. Lembeh is known for its muck diving. I added another strobe to my setup and also bought another macro wet lens. I tried to use them as much as possible ( stacked ).

You can find all the pictures in my gallery.

Dive pics Dive pics Dive pics

Communicating vessels for flow is risky

Blogged by Twan as Aeroponics,Daily life,Growing Chili pepper,Hydroponics — Twan Sat 16 Aug 2014 10:17 am

Oops, when I came home after work this week my chili plant looked half dead. The container for the plant was completely empty. Somehow the tube moved and resulted in emptying the plant container in the main container.

I need to find a better solution for this..

Experiment: large reservoir + water flow by communicating vessels

Blogged by Twan as Aeroponics,Daily life,Growing Chili pepper,Hydroponics — Twan Wed 6 Aug 2014 3:50 pm

Until recently, my aeroponic/hydroponic setups were made according to a simple system. Namely, the water container is also the container where the plant is growing in/on and where the pump to spray/wet the roots and aerate the water is in.

Over time I realized 3 things about this setup.
– You need a pump per plant, meaning adding plants equals adding pumps. This uses more energy and is noisier.
– Roots tend to clog the pump after a while.
– From the outside of the container, you can’t see what the water level is and you need to work with the sound that the pump is making ( unreliable ).

My idea was to experiment with a ‘shared’ reservoir. In this main reservoir I would pump the water to a separate container within this reservoir which would then overflow back into the main reservoir. The plant pots are connected by a small tube ( communicating vessels ) with the main reservoir and because the level in the main reservoir changes by pumping the water into a separate container, I would generate a flow of water and therefore transfer the aerated water to the plant pots.

– Flow is dependent on functioning communicating vessels. This is also not so reliable.
– Transparent hose got algae grow (eating up my nutrients)

Still missing a beat

Blogged by Twan as Daily life,Home automation — Twan Mon 19 May 2014 8:12 pm

The active USB hub did not do the trick.

Next steps:
– get some fresh batteries for the sensor ( although it reports to have enough battery power )
– try to relocate the Pi + RFXcom to another room

Missing the beat?

Blogged by Twan as Daily life,Home automation — Twan Sat 10 May 2014 11:06 am

Controlling things on 433mhz is cool however I also need to be able to rely on the signals to arrive.

I have been experiencing missing sensor values from one of the temperature/humidity sensors (located in the kitchen). I get readings, but I think I miss more of them. I tried to move around the RFXCom a bit but so far this hasn’t improved connectivity.

Since I have my pumps also in the loop I also saw that the ‘off’ signal doesn’t reach the switch once in a while. The distance between RFXCom and this switch is very low (5 meters).

At the moment the RFXCom and a USB wifi adapter are directly connected the USB ports of the raspberry pi. I think the next thing I will try is to get an active USB hub, and see if that improves the situation.

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