Project

General

Profile

Actions

Feature #3566

open

power supply / battery / charge for our GSM-R OPS 940

Added by roh over 5 years ago. Updated 12 months ago.

Status:
Stalled
Priority:
Normal
Assignee:
Target version:
-
Start date:
09/18/2018
Due date:
% Done:

50%

Spec Reference:
Tags:

Description

figure out a pinout/spec for these 2 kinds of devices:
  • sagem NNG OPS 940
    • pogopins from device to battery
    • ericcson style flat connector row on bottom end
    • 3.6V 2.3Ah li-ion battery
  • timba tec pocket pc
    • 5V DC 2.4A label
    • 3.7V 4Ah li-ion battery

Files

P9180011.jpg View P9180011.jpg 370 KB roh, 09/18/2018 02:46 PM
P9180012.jpg View P9180012.jpg 337 KB roh, 09/18/2018 02:46 PM
P9180010.jpg View P9180010.jpg 366 KB roh, 09/18/2018 02:46 PM
P9180009.jpg View P9180009.jpg 378 KB roh, 09/18/2018 02:46 PM
P9180008.jpg View P9180008.jpg 335 KB roh, 09/18/2018 02:46 PM
P9180005.jpg View P9180005.jpg 374 KB roh, 09/18/2018 02:46 PM
P9180007.jpg View P9180007.jpg 365 KB roh, 09/18/2018 02:46 PM
P9180004.jpg View P9180004.jpg 398 KB roh, 09/18/2018 02:46 PM
P9180002.jpg View P9180002.jpg 332 KB roh, 09/18/2018 02:46 PM
P9180003.jpg View P9180003.jpg 461 KB roh, 09/18/2018 02:46 PM

Checklist

  • source some suitable batteries
  • solution for charing the batteries
Actions #1

Updated by roh over 5 years ago

timba:
5V (+ center - ring) 2.4A

Actions #2

Updated by roh over 5 years ago

i disassembled one ops 940nd which had some mechanical defects (2 of the screw-sockets are broken out)

from what i can tell http://pinouts.ru/CellularPhones-A-N/sagem_9xx_pinout.shtml this pinout comes close enough.

the pins are staggered in a up-down pattern on this device, and not in a linear row, but the numbers make sense. the one closest to the coax (1) is plus, the gnd os on pin6 or coax shield.

for daily fnord: this phone seems to be a completely different phone wrapped into 2 extra add-on boards (new keyboard/display pcb and backshell pcb to adapt different battery)

Actions #3

Updated by laforge over 5 years ago

  • Priority changed from Normal to Low
Actions #4

Updated by laforge over 4 years ago

  • Status changed from In Progress to Stalled
  • Assignee changed from roh to laforge
Actions #5

Updated by laforge over 1 year ago

  • Tags set to ASCI
  • Assignee changed from laforge to roh
Actions #6

Updated by laforge about 1 year ago

  • Priority changed from Low to Normal
Actions #7

Updated by laforge about 1 year ago

I've picked this up after quite some time. I can confirm the findings regarding the pinout / polarity for the charger.

Sadly, the batteries we have are not able to charge anymore. I've opened one of the battery packs and tried to carefully (with 50mA limit) apply charging directly to the Li-Ion cell (directly, without a protection circuit) - it doesn't draw a single milli-ampere.

Luckily there is a company offering commercial battery replacement service for this type of battery. I'll try that with two of the three batteries we have.

Actions #8

Updated by laforge about 1 year ago

  • Checklist item source some suitable batteries added
  • Checklist item solution for charing the batteries added
  • Subject changed from build charger for gsm-r toys to power supply / battery / charge for our GSM-R OPS 940
  • Assignee changed from roh to laforge

I have reversed the pin-out of the battery connectors. Providing 3.7V from a lab power supply on those pins makes all three of our OPS940 power up. With a stock sysmoISIM-SJA2 they (rightfully) complain that railway emergency calls are not permitted. There are plenty of GSM-R specific menus on the UI, registering for functional addressing and group calls. So it looks good in terms of using those for testing any upcoming related features in Osmocom CNI.

Actions #9

Updated by laforge about 1 year ago

See also Sagem_OPS_940

Actions

Also available in: Atom PDF

Add picture from clipboard (Maximum size: 48.8 MB)