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== General ==
== General ==
The buttonbox is used for time accurate(1ms) button press registration. We use it to register buttonpresses, soundkey, voicekey signals and to send tone onset, analog output, triggers with the BITSI protocol. It is suitable for Behavioral, EEG, MEG, and fMRI experiments. The buttonbox is connected to a computer with a usb connection.
== BITSI Protocol ==
BITSI stands for Bits to Serial Interface.The hardware design is based on an interface board called Arduino, which is named a BITSI shield or add-on. The shield is designed in a way that it can be duplicated easily. Find the technical design drawings attached.
The output connector has two binary eight bit ports: input and output. The two ports can be used for responses (input) and stimulus triggers (output). Two 8 bits analog outputs and three 8 bits analog inputs. The output connector has a sound and voicekey which triggers when a amplitude reaches a threshold?. The baseline for this treshold is determined for 1 sec when the BITSIbox is powered (no sound should be applied). By using the serial port, the BITSI can be used platform independently: it works on Windows, Linux and Mac OSX. Most programming environments and stimulus packages support serial communication.
== USB-Com port settings ==
== TSG ButtonBox hardware 2013 ==
== TSG ButtonBox hardware 2013 ==