BATTERY CONNECTO

(no name) ((no email))
Thu, 15 Sep 94 14:44:25

Here it is, by popular demand, the pinout for the 1701 and 1702
power connector.

/-----U-----\
pin / \
1-12volt / O O O \
2-15.6volts / 7 6 5 \
3-5volts | _ (index |
4-HL (used | O | | pin) O |
to determine | 4 - 3 |
full charge) \ O O /
5-controller (?) \ 2 1 /
6- ground \_______________/
7- ground
This is the view from the rear of the
ultralite

You would of course, connect your 12 volt battery to pins 1 and 6 or 7
I soldered 6 and 7 together in the external power supply which I built.
Pin 1 would be the positive lead from the battery, don't get them switched
or you will have smoke and a dead Ultralite. Also, I should point out that
when using the Ultralite on 12volts, you are not charging the internal 5v
battery for the "silcon disk", so you will need to plug into the regular
charger to keep a charge in that battery. No 5v = no data on your silicon
drive! As far as a replacement for the 5v battery, I was thinking of
using a lithium cell such as those used to maintain Cmos setup data
in a 286 or newer desktop computer. I have not tried this yet, but some
day perhaps I may be forced to if it dies.


After reading the post about using "D" cells, it occured to me that buying

a small 12v "gel cell" would be a good idea, a gel cell is a lead acid
battery much like a car battery except the electrolyte is sealed inside
the battery, if you have a UPS, it has some in it.
They are available from places
such as Digi-key, they also stock the connector for the Ultralite power
as well as the connector for the serial port. The number for them is
800 344 4539 (800 digikey), the part number for the serial connector is
CP2090ND the current price is $1.65 US. The power connector is the same
as the one used for Mac printers, also known as Philmore EMA8.
As long as I'm at it here, I might as well include the pinout
for the serial port.

---------
/ \
/ 7 8 9 \
/ \
| 3 4 5 6 |
| |
\ 1 2 /
\ /
\ /
---------
In this diagram you are looking
at the pins on the end of the connector

pin number on UL | equivalent 24 pin "D" | equivalent 9 pin "D"

1 ring indicator RI 22 9
2 transmit data TXD 2 3
3 recieve data RXD 3 2
4 req to send RTS 4 7
5 clear to send CTS 5 8
6 data set ready DSR 6 6
7 ground GND 7 5
8 data carrier detect8 DCD 1
9 DTR 20 4

I know all of this looks immpossibly complicated but keep in mind
that all you need to run laplink are pins 2 and 3 along with a ground.
BTW, if you connect pins 2 and 3 directly to pins 2 and 3 respectively
between the ultralite connector and a standard 9 pin serial cable, then
you will have a null modem laplink cable and that is exactly what you
need to laplink to your desktop machine. I use the interlink and interserv
utilities which come with dos 6.2. First you must load interserv to the
ultra, (using laplink), then connect using it. The Ultra will then
appear as an additional hard drive
on your desktop machine, mine usually comes up as drive F:, ( I am using
doublespace also). Any questions ? e-mail me or post to the group, cuz
chances are you ain't the only one with the same question. Good luck, all!

Frank

No affiliation with Nec or Digikey!