Adding A New Experimental Parameter
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Sensing only: optical sensor (photodiode, phototransistor) for new spectra, pH sensor
Actuation only: optical stimulation w/ new LED
Both: fluorescence measurements (LED/optical sensor pair), feedback driven optical stimulation
Can new hardware be fitted onto vial?
Hardware CAD files can be found .
Can the eVOLVER provide necessary power to control actuator?
The base eVOLVER can provide 5V or 12V signal to the vials.
Otherwise, look into changing the .
Is the signal you are sensing strong enough to be sensed using the components you will use?
The best way to answer these questions is to go through the datasheets of components you are interested in integrating and breadboarding with the eVOLVER Motherboard. This will help you also establish and tune dynamic ranges for new sensing capabilities. Additionally, you can explore swapping in new power supplies for components with higher power consumption specs. Once you've established compatibility and feasibility, you can begin integrating a new experimental parameter for eVOLVER.
Each Arduino is connected to 2 SA slots so that culture parameters that require sensing/actuation can share data, but Arduino is still capable of controlling each SA slot individually.
If parameter requires only sensing or actuation, then its best to pair with parameters that also require sensing or actuation (i.e. stir) for efficient usage of Arduinos
If the experimental parameter is sensing a culture condition, plug in a ADC Board
If the experimental parameter is applying a stimulus to the culture, plug in a PWM Board
All Arduinos communicate with Raspberry Pi along same serial line and either look for tags/add tags associated with the parameter they’re responsible for controlling
Smart Sleeve 3D printed housing may need to be redesigned to fit components
Solder component leads to correct Component Mount Board (CMB) pins, which is set by slot position of SA slot(s)
E.g. If using SA slot 8, make sure that components leads are wired to position 8 on CMB
If parameter is for actuating, 'fields_outgoing' set to 17 (see example below):
If parameter is for sensing, fields_outgoing set to 2 (see example below):
Basically, you need to create a new method in the EvolverNamespace class
, which can be called in your custom control code
Example below using default stir parameter:
GitHub and wiki more information regarding how to program Arduinos
of wiki goes in more depth on how to create culture control algorthms