Difference between revisions of "Rev200 mods"
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* populate so measurement of supply voltage is default (R222, R233 installed). its easier to remove components than to add them. | * populate so measurement of supply voltage is default (R222, R233 installed). its easier to remove components than to add them. | ||
* locate IMU header for easy access. possibly rot180 - or move 2mm away from edge. | * locate IMU header for easy access. possibly rot180 - or move 2mm away from edge. | ||
| − | * remove 1.25mm headers for EC30 encoder/hall sensor, replace with single 12x0.8mm header. Make a 5V clock output from one of the HALL C PIO. [http://dhcp-17-197.media.mit.edu/ankle/for_mpd/ | + | * remove 1.25mm headers for EC30 encoder/hall sensor, replace with single 12x0.8mm header. Make a 5V clock output from one of the HALL C PIO. [http://dhcp-17-197.media.mit.edu/ankle/for_mpd/prelim-EMILE3_070709.pdf interface cable] |
* need to determine the accuracy of the RTC. Seems to be drifting. | * need to determine the accuracy of the RTC. Seems to be drifting. | ||
Revision as of 19:43, 30 September 2009
- PF Top Nav; PCB; Hardware; Assembly PFCmdMenu iochan
- PCA : SC/MC 218 FET 217 IMU219 Swiffy Rev200_mods
- PFCMD : SC; MC; PFCMD_PY; Pf_calb_table_py; Virtual spring test; PF1_Code_History; PF EEPROM
- SERIES: S01 S02 S03 wow_left wow_right
PCB needed Revisions
- debug documentation should should show all TP pads, and not be the mirror image.
- KS - need to adjust PCB outlines
- height of coin cells is too great. need the original coin cell spec
current sensors
- presently 5V current sensor becomes 3.283V, but ADC reference is 3.0V so of the 75.76A range (0->5V), only 69.23A are viable. Thus range is -37.88A to +31.34A. The scale factor is 65536 / (5/.066 * 3/(5*10/15.23)) = 946.6789
FET
- populate coin charger as default with 6.3V target voltage (R=1.21meg). If non-rechargeable cells are installed, DNP the connecting resistor.
- way to measure coin cell voltage without charger enabled? MTR ENABLED -> disable 6V LDO
- change D13 to diode that actually has 200mV drop @ 1uA. BAS116-F-7 appears to have 427mV @ 0.3uA
SCMC
- SUGGEST : linear spring input will be used for some other 0-3V analog signal input. Would like AGND, Analog 3V reference, Analog 5V, and a pair of analog inputs. (Battery temp, and previous linear spring.)
- populate so measurement of supply voltage is default (R222, R233 installed). its easier to remove components than to add them.
- locate IMU header for easy access. possibly rot180 - or move 2mm away from edge.
- remove 1.25mm headers for EC30 encoder/hall sensor, replace with single 12x0.8mm header. Make a 5V clock output from one of the HALL C PIO. interface cable
- need to determine the accuracy of the RTC. Seems to be drifting.
- R206, R216 -> 6.66k to scale range 0-5V to 0-3.0V (current sensors)
- bridge current sense duplicate phase U,V sense
IMU
- probably want to upgrade dual axis IMU
- battery measurement circuit needs to be re-done.
