Difference between revisions of "Rev200 mods"

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m (→‎PCB needed Revisions)
m (→‎SCMC)
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==SCMC==
 
==SCMC==
−
* change cutoff freq to ~15Khz for temp circuit (U22) R102=1k, C73=0.01u  
+
* pg 7/18 : change cutoff freq to ~15Khz for temp circuit (U22) R102=1k, C73=0.01u  
  
 
* pg 7/18 : remove R232 - 10k for batt_temp_mon pullup
 
* pg 7/18 : remove R232 - 10k for batt_temp_mon pullup
Line 40: Line 40:
 
* pg 8/18 : populate so measurement of supply voltage is default (R222, R233 installed).  its easier to remove components than to add them.
 
* pg 8/18 : populate so measurement of supply voltage is default (R222, R233 installed).  its easier to remove components than to add them.
  
−
* pg 14/18 : Add DNP 1k? to the TP252 node that connects to the new previous linear spring connector
 
  
 
* pg 3/18 : replace 1.25mm header for EC30 enc/hall w/ 12x0.8mm header
 
* pg 3/18 : replace 1.25mm header for EC30 enc/hall w/ 12x0.8mm header
 
** [[http://mediawiki.dideas.com/index.php?title=Upd_2x0_218_controller#pinout  12x8 pinout]]
 
** [[http://mediawiki.dideas.com/index.php?title=Upd_2x0_218_controller#pinout  12x8 pinout]]
 
** [http://dhcp-17-197.media.mit.edu/ankle/for_mpd/prelim-EMILE3_070709.pdf  interface cable]
 
** [http://dhcp-17-197.media.mit.edu/ankle/for_mpd/prelim-EMILE3_070709.pdf  interface cable]
−
* replace hall_c input with SSI_CLK 5V output
 
  
−
* need to determine the accuracy of the RTC.  Seems to be drifting.
+
* pg 6/18 : replace HALL_C input with SSI_CLK 5V output
  
−
* need to workout : linear spring input to be used for some other 0-3V analog signal inputs.  Would like AGND, Analog 3V reference, Analog 5V, and a pair of analog inputs.   
+
* pg 11/18 : (CB) need to determine the accuracy of the RTC.  Seems to be drifting.
−
** Battery temp, and previous linear spring.
 
−
** Add zero ohm, DNP at TP252 and route to linear spring input
 
  
−
* locate IMU header for easy access.  possibly rot180 - or move 2mm away from edge.
+
* pg 18/18 : Remove LSSGA before TP56
−
** KS - lower position. CB in V2 appears to be much more space in the shell
+
 
 +
* Connect TP56 to LSSGA connector. needs to protect dsPIC, but no other circuity.
 +
** adjust C95 for 15khz cutoff freq
 +
* pg 14/18 : Connect TP252 to LSSGA connector.  Needs to protect dsPIC, but no other circuity.
 +
 
 +
 
 +
* 3/18 : LSSGA connector  signals:
 +
** AGND
 +
** A3V ref
 +
** A 3V supply
 +
** TP56 analog in
 +
** TP252 analog in
 +
 
 +
 
 +
 
 +
* locate IMU header for easier access.  possibly rot180 - or move 2mm away from edge.
 +
** KS - lower position for V2.  
 +
** CB - in V2 appears to be much more space in the shell, no other changes may be needed.
  
 
==IMU==
 
==IMU==
 
* probably want to upgrade dual axis IMU  
 
* probably want to upgrade dual axis IMU  
 
* battery measurement circuit needs to be re-done.
 
* battery measurement circuit needs to be re-done.

Revision as of 21:45, 30 September 2009


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

  • w/clamp circuit - use thermal vias for R4 - this device is impossible to replace
    • will try low temp solder and send to MPD


  • populate coin charger as default with 6.3V target voltage (R=1.21meg). If non-rechargeable cells are installed, DNP the connecting resistor. (pg 4/8)
  • way to measure coin cell voltage without charger enabled? Connect pin 3 of U10 to something like the SFTYSNS_EN, or MTR_EN signal at TP97 or U20B
  • change D13 to diode that actually has 200mV drop @ 1uA. BAS116-F-7 appears to have 427mV @ 0.3uA


SCMC

  • pg 7/18 : change cutoff freq to ~15Khz for temp circuit (U22) R102=1k, C73=0.01u
  • pg 7/18 : remove R232 - 10k for batt_temp_mon pullup
  • pg 7/18 : remove R245 - 220 ohm for mtr_temp_mon pullup
  • pg 7/18 : R206, R216 -> 6.66k to scale range 0-5V to 0-3.0V (current sensors)
  • pg 7/18 : bridge current sensor use same values phase U,V


  • Pg 8/18 : increase size of resisters (by 10x) for supply voltage measurement (R91, R94, R221, R88). Keep cut off freq the same.
  • pg 8/18 : populate so measurement of supply voltage is default (R222, R233 installed). its easier to remove components than to add them.


  • pg 6/18 : replace HALL_C input with SSI_CLK 5V output
  • pg 11/18 : (CB) need to determine the accuracy of the RTC. Seems to be drifting.
  • pg 18/18 : Remove LSSGA before TP56
  • Connect TP56 to LSSGA connector. needs to protect dsPIC, but no other circuity.
    • adjust C95 for 15khz cutoff freq
  • pg 14/18 : Connect TP252 to LSSGA connector. Needs to protect dsPIC, but no other circuity.


  • 3/18 : LSSGA connector signals:
    • AGND
    • A3V ref
    • A 3V supply
    • TP56 analog in
    • TP252 analog in


  • locate IMU header for easier access. possibly rot180 - or move 2mm away from edge.
    • KS - lower position for V2.
    • CB - in V2 appears to be much more space in the shell, no other changes may be needed.

IMU

  • probably want to upgrade dual axis IMU
  • battery measurement circuit needs to be re-done.
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