Changes between Version 88 and Version 89 of MRI_Stimulator


Ignore:
Timestamp:
Jan 24, 2020, 12:03:49 PM (3 years ago)
Author:
Felex
Comment:

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  • MRI_Stimulator

    v88 v89  
    146146'''2020-01-24 Felex'''
    147147
    148 Switched out the 3rd piezo in the non-MRI setup (aka behavioral empanada with PiHAT 103 (see 2020-01-23 Felex)) with spare piezo. This new 3rd piezo does not exhibit the erratic behavior of the old 3rd piezo (see 2020-01-23 Felex) and in fact exhibits the same behavior as all the other piezos (see 2020-01-23 Felex).
     148Switched out the 3rd piezo in the non-MRI setup (aka "behavioral empanada" with PiHAT 103 (see 2020-01-23 Felex)) with spare piezo. This new 3rd piezo does not exhibit the erratic behavior of the old 3rd piezo (see 2020-01-23 Felex) and in fact exhibits the same behavior as all the other piezos (see 2020-01-23 Felex).
    149149
    150150At this point we consider the problem fixed and are contacting David Somers' group to give them back the non-MRI setup.
     
    152152'''2020-01-23 Felex'''
    153153
    154 Took all 5 piezos of the non-MRI setup (aka behavioral empanada with PiHAT 103) along with spare piezo and buzzed on all 5 channels (30 combinations). Piezos 1, 2, 4, 5, and spare exhibited the same behavior across all channels (25 combinations). They drew the same amount of current (~0.96A) and displayed the same boost and signal voltages on the oscilloscope.
     154Took all 5 piezos of the non-MRI setup (aka "behavioral empanada" with PiHAT 103) along with spare piezo and buzzed on all 5 channels (30 combinations). Piezos 1, 2, 4, 5, and spare exhibited the same behavior across all channels (25 combinations). They drew the same amount of current (~0.96A) and displayed the same boost and signal voltages on the oscilloscope.
    155155
    156156Piezo 3 exhibited very erratic behavior. Sometimes it drew 0.96A sometimes 0.74A and sometimes it displayed the same boost and signal voltage graphs as the other piezos, sometimes different graphs.