Check out the Latest Articles:
cheap nike jerseys cheap christian louboutin outlet cheap oakleys fake oakleys cheap jerseys paypal discount christian louboutin discount ray bans wholesale authentic jerseys cheap oakleys cheap michael kors store cheap christian louboutin online elite jerseys wholesale cheap nfl jerseys discount ray bans cheap michael kors cheap ray bans replica oakleys wholesale replica michael kors wholesale oakley sunglasses cheap fake ray bans cheap jerseys china cheap christian louboutin outlet fake cheap oakleys cheap oakleys cheap jerseys sale cheap christian louboutin discount oakleys wholesale nfl jerseys cheap michael kors handbags michael kors handbags discount christian louboutin cheap jerseys michael kors on sale discount ray bans wholesale jerseys cheap michael kors fake oakleys online cheap michael kors bags replica ray bans discount ray bans authentic jerseys cheap christian louboutin cheap oakleys cheap oakleys outlet nfl jerseys christian louboutin outlet cheap ray bans cheap authentic nfl jerseys cheap michael kors handbags michael kors bags christian louboutin outlet Jerseys Wholesale From China replica michael kors cheap michael kors outlet cheap nfl jerseys wholesale cheap fake oakleys fake sunglasses cheap michael kors outlet ray bans shop fake cheap oakleys cheap authentic nike jerseys christian louboutin online fake cheap oakleys fake oakleys store cheap jerseys wholesale cheap christian louboutin replica oakleys cheap jerseys wholesale cheap replica oakleys michael kors handbags wholesale jerseys china discount nhl jerseys wholesale replica michael kors cheap ray bans cheap jerseys cheap fake oakleys fake oakleys cheap michael kors store cheap ray bans wholesale oakleys jerseys wholesale christian louboutin outlet cheap mlb jerseys oakley sunglasses authentic jerseys christian louboutin outlet cheap replica oakleys wholesale authentic jerseys wholesale mlb jerseys michael kors handbags cheap jerseys online shopping cheap nhl jerseys replica michael kors bags cheap fake oakleys cheap jerseys from china cheap fake oakleys cheap oakleys sunglasses michael kors bags sale discount ray bans wholesale oakleys wholesale nike nfl jerseys discount christian louboutin wholesale nfl jerseys oakleys store wholesale jerseys wholesale christian louboutin cheap jerseys from china official jerseys fake cheap oakleys cheap michael kors handbags wholesale jerseys cheap wholesale jerseys michael kors on sale cheap fake oakleys oakley sunglasses cheap discount oakleys oakleys sunglasses usa cheap michael kors online wholesale and retail oakleys cheap michael kors outlet cheap wholesale jerseys wholesale cheap jerseys china cheap replica oakleys fake oakleys online authentic jerseys wholesale ray bans fake cheap oakleys jerseys wholesale replica ray bans wholesale sunglasses wholesale mlb jerseys cheap cheap nfl jerseys cheap michael kors outlet cheap fake ray bans cheap oakleys sale cheap fake ray bans oakleys sunglasses michael kors bags fake cheap oakleys fake cheap oakleys authentic wholesale jerseys nhl jerseys replica oakleys fake oakley sunglasses wholesale jerseys replica ray bans fake cheap oakleys cheap jerseys replica ray bans replica christian louboutin wholesale nba jerseys cheap fake ray bans ray bans sale wholesale nfl jerseys wholesale sunglasses michael kors bags outlet cheap ray bans on sale fake cheap oakleys cheap nfl jerseys cheap nhl jerseys cheap oakleys cheap jerseys cheap fake oakleys michael kors outlet cheap jerseys store fake ray bans christian louboutin shoes discount nba jerseys michael kors for sale cheap fake oakleys fake ray bans sunglasses cheap michael kors handbags oakley sunglasses michael kors handbags michael kors on sale fake cheap oakleys cheap nfl jerseys replica oakleys cheap oakleys outlet cheap oakleys cheap authentic nfl jerseys paypal cheap fake oakley sunglasses cheap oakleys cheap fake ray bans fake ray bans cheap ray bans cheap authentic jerseys replica michael kors bags cheap michael kors replica oakleys cheap replica oakleys wholesale oakleys cheap michael kors handbags michael kors outlet on sale wholesale oakleys authentic cheap jerseys cheap oakleys store cheap jerseys from china oakleys sales cheap jerseys paypal discount oakleys for shopping cheap oakleys jerseys wholesale Christian Louboutin Outlet discount fake oakleys cheap authentic nfl jerseys cheap michael kors handbags cheap fake oakleys fake oakleys cheap nfl jerseys christian louboutin outlet cheap michael kors cheap jerseys cheap jerseys cheap fake ray bans fake oakleys shop cheap jerseys cheap oakley sunglasses cheap michael kors cheap authentic jerseys wholesale jerseys fake ray bans online fake ray bans sunglasses cheap jerseys china fake oakleys cheap nhl jerseys fake oakleys cheap oakleys replica christian louboutin online cheap michael kors outlet wholesale nba jerseys cheap authentic ncaa jerseys cheap elite jerseys oakleys sale cheap replica oakleys wholesale jerseys ray bans sunglasses cheap ray bans cheap nba wholesale jerseys fake oakleys cheap nfl jerseys wholesale fake oakleys cheap jerseys free shopping cheap christian louboutin cheap fake oakleys
5 years of turbidity meter geeking… and now this!

Putting our newest device for OD-measurements on GitHub, i thought of reflecting a bit on the last 5 years of developments of the turbidity meter, also known as Kafi-Schnapps detektor or photospectrometer. The device measures the absorption of light through a defined volume of a sample. Part of the light intensity is absorbed and the transmitted light is detected using a simple light sensor (LDR). Using specific light sources (LED of different colors) and colorimetric tests a large variety of experiments can be performed ranging from environmental monitoring, water quality, bacterial growth measurements or bio-chemical assays. And it can also be used a synth for bio-sonifiation!
TurbiGnUSB_august2016
TurbiGnUSB, Shenzhen made board with voltage and current regulation, based on the BabyGnusbuino aka CocoMake7 bootloader. Now on GitHub!

800px-Dusjagr_pifCamp_DIY-Photometer_schematic

The Beginning Spring 2011: Connecting some data-sensing to the net, but what?
dani_dusjagr_latenightDuring a 24h pachube hackathon in the MechArtLab, Zurich, in 2011 we were focusing on IoT and live data streaming using (or not using) pachube. Geeking around with arduinos and LEDs and the newly developed idea of the Kresse Shield, dusjagr built a first prototype of a turbidity sensor shield using a cheap red laser and an LDR, sending the data to PD using a serial connection and from there further to the internet. The Kresse-Shields have then be further developed into a whole concept of inspiring arduino geeks into making their own laboratory instruments as Lab-on-an-Arduino. The shield itself comes completely emtpy, just pins to connect to the Arduino and a platform to start building whatever you like!
KresseShield

Kresse Shield 1.0: build your own lab instruments on an Arduino

Making it Cheap X-Mas 2012: Babygnusbuino by a.n.y.m.a. enters the stage
Babygnusbuino
BabyGnsubuino 1: A ridiculously small Arduino with USB interface and/or MIDI connection

While geeking around with Attinies during Summer 2012 our friend from the SGMK network, Michi Egger a.n.y.m.a., developed a nice bootloader for the attiny85 to turn it into a USB-programmable device using the Arduino IDE, that can be set as USB-Midi for bi-directional communication or USB-HID device, such as keyboards. The device uses minimal amount of parts and could cost less than 2 $.

Because of the history of Michi’s developments for the GNUSB, he named it BabyGnusbuino. Together with our friends in Indonesia, Lifepatch et al., we used it for many applications, turbidity meters, 8Bit MixTapes, MIDI-Theremins and other low-cost microcontroller educational activities, such as the CocoMake7. Thx to Budi who further developed the hardware compatibility and made it easy to install on all operating systems! Sometimes names as TeenyRiot. Meanwhile other similar platform have been developed such as AdaFruit’s Trinket or from the Hackerspace in Tel Aviv the ATtami.

Summer 2013: Kafi-Schnapps Detektor, Daphnia2Midi Converters and Bug-is-a-VJ (in a cave)
Daphnia_2_midiUsing the device as a MIDI allows you to control synthesizers and make some nice experimental music, just add a few daphnia from your local pond

DSC_0312Going to the caves… Caves are nice! During the Summer of 2013, besides laser micro-life projectors, we explored various ideas of sonification of life forms and site-specific performances. Such as small device like the MIDI-Turbidity meter allows you to very easily put some water sample into it and “hear” the motion of small insects and microorganisms. As they pass the light they’ll cast some shade onto the sensor and the data is sent at high rate to your computer as a MIDI signal. During the Cave Safari’s in Slovenia we used the devices inside and outside the cave to create various sounds and even used the cuvettes as visual elements for bio-visualizations.

Turbidity BugVJ session outside Mačkovica from dusjagr on Vimeo.

Autumn 2013: Connecting it to the Phone, FSK geeking and soft modem library
Baby_talks_modemStaayleWith the idea to connect the turbidity meter directly to a smartphone we were looking into that audio port, using the microphone input for a serial connection “bleeep bluuurp blepblep bleeeeep pip” with the FSK method and some library we ported to the attiny85 with Bengt. By using the microphone input it’s possible to circumvent all restrictions of published “official” apps on all those stores out there. The microphone can be read and the serial FSK signal de-coded using modern webaudio tools and HTML5 directly in your browser. Similar approaches have recently been investigated on PublicLab using WebJack.

Winter 2014: DIY-SATW – Workshop development on building / prototyping photospectrometers as means of interdisciplinary education for students
To introduce the DIY and hacking approach into a creative teaching environment we had a collaboration with SATW and FHNW to develop the idea further on the example of building your own turbidity meter, or more specific in this case a spectrophotometer. The development workshop is documented on the wiki. Through an open process the students are introduced both in some basics of electronics and microcontrollers (arduino) as well as into bio-analytics using enzymatic assays.
SATW_photometry_on_breadboard. Inspired by M. Resnick’s educational research paper “Beyond Black Boxes: Bringing Transparency and Aesthetics Back to Scientific Investigation”.

Spring 2014: Nyamuk Synthesizers and low-cost photometers, Yogyakarta
Nyamuk_Front_t_shirt_2014Throughout our visit to Yogyakarta and the collaborations with UGM we have explored the use of such low-cost laboratory instruments for local issues, student training, water quality measurements and monitoring of fermentation process. With the Babygnusbuino we were aiming at producing the turbidity meter aka OD-measurement using all locally available electronic parts and etching the boards ourselves. But where to get the cuvettes? Just use a box of Tic-Tac!

And of course… we made some synthesizers with it! The Nyamuk Synthesizer uses mosquita larvae to create crazy 8bit tunes, no Midi or computer needed. For simple readout we added a LED bar and dedicated chip. And yes, you can also buy the T-shirt!

Nyamuk Synthisaaaiza! from dusjagr on Vimeo.

Autumn 2014: DIY-SATW – developing the Turbidity Kit and educational materials
Selection_696The educational developments have been further intesified and we published an article in the SATW info, and also an educational curriculum to be used by the mentors of such collaborative learning environments. The article from SATW Info 2/15 – Biotechnology for all / DIY in bioanalytics: doing and grasping it yourself is available for download in German, English and French. The pedagogic concept and educational kits were developed during a project funded by the Swiss Academy for Engineering Sciences (SATW), together with hackteria, M. Dusseiller and U. Gaudenz, and FHNW School for Lifesciences, Dr. D. Gygax, during a workshop with an interdisciplinary group of participants.
Turbidity KitTurbidity Kit, getting started with DIY electronics prototyping and biological assays

Autumn 2015: Using the turbidity meter for real world OD-measurements during HTGAA
turbidity_meeterGaudiHTGAADuring the participation of GaudiLabs at HTGAA we further developed the code to get more reproducible and calibrated OD measurments, needed to follow growth curves of e.coli bacteria getting ready for transfection. To get the real OD values additional functions have been added to the code, measuring of the calibration value (clear water), logarithmic calculation of the absorbed light intensity according to the Beer-Lambert law and then outputting the value as keyboard strokes directly into your spreadsheet. All the devices needed are well documented on Gaudi’s final project “How to set up a microbiology lab” and other interesting summaries can also be found on the hackteria wiki.

Spring 2016 Going to Bavaria: Trübheitsmessgerät
TrubheitsmessgerätInvited by our friends from Make Munich we made a whole series of kits like the Trübheitsmessgerät, adapting a more German or Bavarian style of the laser-cut devices. This edition fits nicely on the breadboard and allows prototyping your own measurement setup, changing resistors and learning about the inner workings of photometric measurements. You can find the laser cutting files on thingyverse.

Summer 2016… AND NOW THIS: TurbiGnUSB by Gaudi Industries & Söhne Inc.
.

Continue following the developments on GitHub



  1. It‘s quite in here! Why not leave a response?



Leave a Reply

Your email address will not be published. Required fields are marked *