Exact start time

[MIsabel Cardeñosa]

Hi Paul, 

Thanks a lot for your answer!

I'm using this EEG recorder ( http://www.neuroelectrics.com/enobio ). It 
has a TCP/IP port opened for send triggers and it seems to be the easiest 
way of communication. 
Here ( http://wiki.neuroelectrics.com/index.php/Interacting_with_NIC ) is 
explained how to interact with NIC using other software, and the choices 
they give are TCP/IP and LSL.
Also, I saw they have an External TTL Input Recorder ( 
http://www.neuroelectrics.com/sites/neuroelectrics.com/files/enobio/NE_TTL_Trigger_Receiver_UserManual.pdf 
) but I don't have it . If there is not solution I guess I would have to 
buy it.

Hope anyone can help me. Thanks!!

El viernes, 25 de julio de 2014 09:35:44 UTC+2, Paul Groot escribió:
>
> Hi MIsabel,
>
> Unfortunately you cannot synchronize a stimulus computer and an EEG 
> recorder accurately this way. Most EEG systems have a special feature to 
> synchronize with external systems. Traditionally this is done by using a so 
> called TTL signal, which can be generated using a parallel printer port for 
> example. Such a signal can be generated by EPRime with millisecond 
> accuracy. But there exists other synchronization methods as well, so it 
> depends on the EEG recorder what type of synchronization is supported. 
> Perhaps I could be more specific if you mention the type of EEG device 
> you're using...
>
> Best,
> Paul
>
>
> On 24 July 2014 13:44, MIsabel Cardeñosa <misabe... at gmail.com 
> <javascript:>> wrote:
>
>> Hi all,
>>
>> I'm working on an integration of E-Prime 2 Standard edition with an EEG 
>> signal recorder, and I found a problem with time measurement:
>>
>> With E-Prime I can see the start time once the experiment is finished in 
>> the E-Data for example, but it comes with the format "dd/mm/yyyy HH:MM:SS". 
>> The problem is that I need to know milliseconds of start time too or the 
>> experiment won't worth it at all.
>>
>> I looked at Now() and Time$, and both return a Date object with the 
>> previous format.
>>
>> Trying to find a solution I though that maybe if I use 
>>       myDate = DateAdd("s",3,Now()) 
>> and after it
>>       While Now()  < myDate
>>       Wend
>> I could force the start 3 seconds later, but after test it I realized 
>> milliseconds are taken too although it doesn't show them.
>>
>> Does anyone now how to create a Date with only HH:MM:SS.00000000... or a 
>> better solution? 
>>
>>
>> Thanks in advance!
>>
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