Difference between revisions of "Rev200 mods"
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=PCB needed Revisions= | =PCB needed Revisions= | ||
* debug documentation should should show all TP pads, and not be the mirror image. | * 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== | ==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 | * 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== | ==FET== | ||
| − | * populate coin charger as default with 6.3V target voltage (R=1.21meg) | + | * 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 | * 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 | * change D13 to diode that actually has 200mV drop @ 1uA. BAS116-F-7 appears to have 427mV @ 0.3uA | ||
==SCMC== | ==SCMC== | ||
| − | * populate so local vbat is default (R222, R233 installed) | + | * populate so local vbat 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, replace with single 12x0.8mm header. add 3.3V to 5V level shift output. | + | * remove 1.25mm headers for EC30, replace with single 12x0.8mm header. add 3.3V to 5V level shift output.??? make a 5V clock output from one of the PIOs |
* need to determine the accuracy of the RTC. Seems to be drifting. | * 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 | + | * R206, R216 -> 6.66k to scale range 0-5V to 0-3.0V (current sensors) |
* bridge current sense duplicate phase U,V sense | * bridge current sense duplicate phase U,V sense | ||
Revision as of 18:58, 28 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
- populate so local vbat 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, replace with single 12x0.8mm header. add 3.3V to 5V level shift output.??? make a 5V clock output from one of the PIOs
- 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.
