Subject:
|
Excessive clutziness when replacing the NiCad battery pack
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Tue, 7 Dec 1999 21:41:01 GMT
|
Original-From:
|
Bill Bynum <bynum@cs+AvoidSpam+.wm.edu>
|
Viewed:
|
751 times
|
| |
|
|
Hello, everyone:
I'm having problems when I replace the HandyBoard's NiCad battery.
I have probably replaced around 10 battery packs by now on different
HandyBoards. On 4 or 5 of the replacements, I end up having to
replace the 74HC373 latch, sometimes the 373 AND the memory, and
on one occasion, the 373, the memory, AND the CPU.
I disconnect the old battery from the leads soldered into the
HandyBoard, plus lead first, then the negative. I leave the other
ends of the two leads soldered into the HandyBoard. Yes, I realize
that this is opposite to the way that Fred Martin tells us to attach
the battery on original assembly, but once the HandyBoard is built,
I hate to tamper with the board any more than I have to. I especially
don't like to have to replace the 74HC373 latch, hence my posting!
I solder the leads to the new battery in the reverse order,
negative first, then the positive.
The 373 gets destroyed in those times when I end up fumbling
around with the positive lead, trying to poke it through the hole
in the battery (shakey hands due to advanced age, I suppose).
I suspect that this fumbling is causing a high enough transient
voltage to ruin the 373.
Do any of you have any tips for me? Is there a better way to
swap HandyBoard batteries than I'm using?
Thanks in advance for your advice.
Bill Bynum
|
|
Message has 2 Replies:
6 Messages in This Thread:
  
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
