On thursday we started straight away with hands-on work. The weather for a change was a bit moody, with clouds and some rain, which was good for two things – testing our data readings in the Media Lab Prado garden in suddenly different weather conditions; and focusing inside in further experiments with electronics.
By today we also noticed a very straight division within the group – and a very good one – those into electronics kept busy on one side of the workspace, and those into data meaning interpretation took their devices and computers with Magic Plot outside, to the garden, to experiment with various plants. We also gained a nicely explained a scientific research procedure in a form of a picture, which naturally participants had followed.
Indoors, the electronic enthusiasts, based on all previous days, found out that turning of the power on the opamp can prevent it from saturating the output values. We thought that perhaps one solution would be to keep resetting the arduino, in order to stop values from “drifting”. However we learnt after some research that it couldn’t work as it would loose the serial connection between arduino and computer.
Carlos thus had started to work on an addition to the current circuit, so that, with the help of a transistor, it will be possible to briefly turn off the opamp power from within a code.