[Eeglablist] Parallel port

[Andrew Hill]

USB to parallel adaptors have pretty poor latency, and what is worse, it's not a consistent latency, and will have variability ranging from 8-50ms or more, depending on other factors.  This isn't usable for inserting ERP codes into an EEG record, obviously.

A laptop with a ExpressCard slot can take a parallel adaptor, or Ido may be able to use an ethernet-to-parallel adaptor and modify the script to use that instead of parallel to send the event codes.

Best,
Andrew


On Dec 16, 2009, at 2:15 PM, Grega Repovs wrote:

> Hello,
> 
> The easiest way might be to go with a USB to parallel adapter, e.g.:
> 
> http://sewelldirect.com/usbtoparallel.asp
> http://www.buy.com/retail/product.asp?sku=211409432&listingid=45946112
> http://www.amazon.com/Syba-SD-USB-DB25-Parallel-Adapter-Prolific/dp/B000JPCAKY
> http://byterunner.com/byterunner/category=USB+to+Parallel+Adapters
> http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4397038&CatId=471
> 
> You might need to check the exact drivers and compatibility.
> 
> Best,
> 
> Grega
> 
> 
> 
> On Dec 16, 2009, at 4:24 PM, Ido Davidesko wrote:
> 
>> Hello,
>> In our EEG system we`re sending TTL codes through the parallel port of the display PC which are recorded in a separate EEG channel. These codes are used in order to synchronize the EEG data with the stimuli. Since this is a mobile system, we`re using a laptop in order to present the stimuli. Recently, we had to replace our laptop but couldn`t find any new laptops with built-in parallel port. 
>> 
>> I know that it is a bit out of the scope of this mailing list - but I was wondering if anyone has experience with this issue.
>> 
>> Thanks!
>> Ido
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