Electrical stimulator: Difference between revisions
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Most important specifications: | Most important specifications: | ||
* MDD CE certified and FDA cleared medical device | * MDD CE certified and FDA cleared medical device | ||
* Pulse durations from 50µs to 2ms | * Pulse durations from 50µs to 2ms | ||
* 100mA (DS7A) constant current output from 400V | * 100mA (DS7A) constant current output from 400V | ||
* Flexible TTL compatible trigger options or front panel push button | * Flexible TTL compatible trigger options or front panel push button | ||
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If you'd like to drive the stimulator with Matlab, make sure you initialise access to the driver with: config_io (http://apps.usd.edu/coglab/psyc770/IO64.html) | If you'd like to drive the stimulator with Matlab, make sure you initialise access to the driver with: config_io (http://apps.usd.edu/coglab/psyc770/IO64.html) | ||
Then assign the right address: | Then assign the right address: | ||
address = hex2dec('AFE8'); %check address device manager, ports (COM &LP), LPT1 resources 1st entry | address = hex2dec('AFE8'); %check address device manager, ports (COM &LP), LPT1 resources 1st entry io range | ||
and flip the bits, for example like this: | and flip the bits, for example like this: | ||
byte = 0; | byte = 0; | ||
Revision as of 17:07, 10 December 2021
For electrical current stimulation, we use a Digitimer Constant Current Stimulator, model DS7A. It can be used at 3T, 7T, as well as the mock scanner.
Most important specifications:
- MDD CE certified and FDA cleared medical device
- Pulse durations from 50µs to 2ms
- 100mA (DS7A) constant current output from 400V
- Flexible TTL compatible trigger options or front panel push button
- Alternating Polarity control – a toggle switch allows the stimulator to operate in +ve, -ve or alternating polarities during stimulation
If you'd like to drive the stimulator with Matlab, make sure you initialise access to the driver with: config_io (http://apps.usd.edu/coglab/psyc770/IO64.html) Then assign the right address: address = hex2dec('AFE8'); %check address device manager, ports (COM &LP), LPT1 resources 1st entry io range and flip the bits, for example like this:
byte = 0;
outp(address,byte);
byte = 255;
outp(address,byte);
Here you can find an example script.