Neurotechnology Research Systems
Stimulator 2.0
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So the estimated capacitance of an electrode with impedance of 282 k
at 1 KHz is:
( )( )
Note that the capacitance estimated from the impedance measurement is nearly an order of
magnitude smaller than the capacitance of the electrode estimated from a constant (DC) current
pulse.
5.11
Starting stimulation from a digital input
To start stimulation from a digital input first configure the pulse parameters or load an arbitrary
waveform for the channel or channels you want to stimulate. Next, find the “Trigger Mode” control
at the bottom of the screen. There are two digital input trigger modes, “Rising” and “Level”. In the
rising trigger mode, stimulation begins when the digital input for the channel transitions from low
(~0V) to high (~5V). In the level trigger mode, stimulation also begins when the digital input
transitions from low to high, but in level trigger mode, if the digital input is still high when the
stimulation protocol completes then the stimulation protocol will begin again. Note that once the
stimulation pattern is triggered by the digital input, it will play to completion even if the digital
input goes low. This helps guard against un-balanced charge delivery.
Configure channel 1 using the “3_pulse_burst_variable” arbitrary pattern and set the No. of
repetitions to 2 and the Rate to 1000 Hz:
Now select the “Rising” Trigger Mode:
Download the stimulation parameters to the stimulator by selecting “Load”:
Содержание Stimulator 2.0
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