Difference between revisions of "Emg 2009"
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=known issues= | =known issues= | ||
*silk screen for PACONN1 doesnt show connector orientation | *silk screen for PACONN1 doesnt show connector orientation | ||
− | + | *V.FUSED net isn't driven on EMG | |
+ | *Pin 1 of the 2x10 connectors is on the right side. | ||
=previous= | =previous= | ||
[[EMG09]] | [[EMG09]] |
Revision as of 20:05, 26 March 2010
- BiomechDocs BL Knee PFresearchE
- Biomech Documentation links:
- AKCPU2z BLMD6c BLFT6c PSER1c Imu_2010 Emg_2009 Ric Upd_pcb
spiemg1 SCH/PCB
- 8 channel PRE-AMP style EMG amplifier with SPI interface
- SCH [1]
- SCH for 3.3V switcher : [2]
- SCH for 5.4V switcher : [3]
- ADS1258 PDF 24bit, 16 ch, 2 supplies
assembly instructions
- Start by assembling the 3.3V switching regulator and then testing it by verifying 3.3V at TP7. This module has reference designator in the 80s and physical reside in a tight location of the top side of the PCB.
- To power the 3.3V switcher you'll need to apply ~5V to V.PROT from a ~100mA current limited supply. A successful test is the output of 3.3V, with nothing getting hot. To apply power, you may wish to install P1, F1, and D1 and use one of my power pole to 1.25mm adapters.
- Next assemble the 5.4V switcher (refdes 90s) and test with ~7V. Verify ~5.4V at TP6.
- Assemble the -5V switcher (UN1 and support components) and test with ~7V. Verify ~-5V at TP10
- Assemble the +- 2.5V linear regulators (UA1, UA2, and support). Verify +-2.5V at TP8 and TP12.
- Assemble the ADC voltage reference (UR1, UR2 and support). For UR2 use REF3312 in the kit. Verify at TP18 that you see -1.3V WRT to GND, or 1.2V WRT to the -2.5V.
- At this point, it should be safe to assemble the primary IC US1 and the remainder of the PCB.
paconn1 SCH/PCB
known issues
- silk screen for PACONN1 doesnt show connector orientation
- V.FUSED net isn't driven on EMG
- Pin 1 of the 2x10 connectors is on the right side.