25 Depth finder power source (Read 53378 times)
Magicpaddler
Inukshuk
Offline



Posts: 1321
Location: Chicago Burbs
Joined: Jan 7th, 2004
Re: Depth finder power source
Reply #70 - Apr 9th, 2014 at 12:03pm
Quote Quote Print Post Print Post  
The protection circuit is not a big project and the parts can be purchased for $12. I no longer have steady enough hands to do a neat job. 
Enclosure 3*2*1 Radio shack 270-1801                              $3.19
100K resistor Radioshack 271-1347                              $1.49
Protection circuit board www-all-battery.com 32071                  $6.97
Connector (You need to Login or Register to view media files and links) 015000045                        $1.72- $1.45
2 6-32 X1/2” brass screws                                    ??
GLUE Marine Goop                                          ??
(You need to Login or Register to view media files and links)
(You need to Login or Register to view media files and links)
Like this only do not put the 2 output screws on the same side of the box.  If pliers are dropped on this one they could short out the unit or if in a aluminum canoe they could both touch the side at the same time. And do it neater!
This setup is only suitable for light loads of less than 1 amp because of the small leads. The card max continuous current is 4 amps.
Charging
Car battery charger set to trickle charge and with about 2 ohms in series with the charger. Charge through the protection board using the same connections as the load.
2 .91 ohm 10 Watt RadioShack 10WD91 resistors $1.21 each                        $2.42
I did not have a suitable resistor so I used about 8 inches of some Nickel-Titanium single strand wire I had for a different project.  That is some strange stuff makes a good resistor but hard to make good electrical connection to.
Puckster
A set of 9 Energizer Ultrimate Lithium will supply 250ma at > 11 volts for 12 hours. They can be purchased at Sams Club for about $17/set.
  
Back to top
 
IP Logged
 
mastertangler
Inukshuk
Offline



Posts: 3111
Location: florida
Joined: Feb 1st, 2010
Re: Depth finder power source
Reply #71 - Apr 9th, 2014 at 12:15pm
Quote Quote Print Post Print Post  
Puckster wrote on Apr 9th, 2014 at 2:35am:
Yeah MT, I have a hard time with this thread.  I suppose I am about to make this discussion a complete 180 degrees, but what-the-hell, bring along some more AA batteries and forget-about-it!!

I think you're over-analyzing.

Puckster


Nay way dude.......I brought 16 lithium AA's on last summers trip for only 2 weeks and it wasn't a fishing trip.......Maybe 5 hours a day with a few full days thrown in and I didn't get through the trip.

I had some major snafus thrown in however. I slapped on a skid plate before I left which unfortunately was over my thru-hull transducer AND my backlight was left on full power (there are 10 different levels which you control via the power button, who knew?)

So on what I would term a fishing trip, where I run a line all day everyday, I wouldn't get to fer down the road without a significant power source. Knowledge is power.......
  
Back to top
IP Logged
 
mastertangler
Inukshuk
Offline



Posts: 3111
Location: florida
Joined: Feb 1st, 2010
Re: Depth finder power source
Reply #72 - Apr 9th, 2014 at 12:18pm
Quote Quote Print Post Print Post  
Wow MP, looks awesome. How do I go about getting one? Grin Grin Grin
  
Back to top
IP Logged
 
Magicpaddler
Inukshuk
Offline



Posts: 1321
Location: Chicago Burbs
Joined: Jan 7th, 2004
Re: Depth finder power source
Reply #73 - Apr 9th, 2014 at 2:05pm
Quote Quote Print Post Print Post  
MT
If your unit were drawing 250ma you should get 12 hours of operations out of 8 or 9 lithium AA’s.
The Lithium AA’S are a 3000mAH source the LiPo I referenced below are a 5000mAH rechargeable. So you will only get about 1.5 times as much operations out of the LiPo’s as a set of Lithium AA’s. You will still need more than one of them.

mastertangler wrote on Apr 9th, 2014 at 12:18pm:
Wow MP, looks awesome. How do I go about getting one? Grin Grin Grin


Have you ever soldered parts to an electronic board? Can you neatly drill holes and assemble small parts in tight spaces? Do you have a car battery charger and can you hook it up through a resistor?   
  
Back to top
 
IP Logged
 
pine_knot
Inukshuk
Offline



Posts: 908
Location: Springboro, Ohio
Joined: Mar 31st, 2009
Re: Depth finder power source
Reply #74 - Apr 9th, 2014 at 9:30pm
Quote Quote Print Post Print Post  
My head hurts Embarrassed....
  
Back to top
 
IP Logged
 
pine_knot
Inukshuk
Offline



Posts: 908
Location: Springboro, Ohio
Joined: Mar 31st, 2009
Re: Depth finder power source
Reply #75 - Apr 9th, 2014 at 9:32pm
Quote Quote Print Post Print Post  
db wrote on Apr 8th, 2014 at 8:15pm:
My multiple firsthand testing with what I use is:
#1 - 8AAs  will easily last me 2 trips ~5hrs a day so.. 100+ hours.
#2 - Forget to turn it off at night in an overturned canoe and I consider myself lucky to hear the low battery warning in the morning.

A favor Magic? Can you test the bonehead current draw when forgetting to turn 'em off and pinging the Milky Way all night?

Since I'm the weakest link. For me that means 16 LI AAs per trip so about a half pound of batteries... plus FISH LO-K-TOR.


Thx, db.  That makes sense to me and is exactly what I do each trip...and I didn't hear the low battery alarm before morning too...  Smiley 
  
Back to top
 
IP Logged
 
Magicpaddler
Inukshuk
Offline



Posts: 1321
Location: Chicago Burbs
Joined: Jan 7th, 2004
Re: Depth finder power source
Reply #76 - Apr 9th, 2014 at 9:42pm
Quote Quote Print Post Print Post  
pine_knot wrote on Apr 9th, 2014 at 9:32pm:
db wrote on Apr 8th, 2014 at 8:15pm:
My multiple firsthand testing with what I use is:
#1 - 8AAs  will easily last me 2 trips ~5hrs a day so.. 100+ hours.
#2 - Forget to turn it off at night in an overturned canoe and I consider myself lucky to hear the low battery warning in the morning.

A favor Magic? Can you test the bonehead current draw when forgetting to turn 'em off and pinging the Milky Way all night?

Since I'm the weakest link. For me that means 16 LI AAs per trip so about a half pound of batteries... plus FISH LO-K-TOR.


Thx, db.  That makes sense to me and is exactly what I do each trip...and I didn't hear the low battery alarm before morning too...  Smiley 


That is why I prefer a couple of sets of batteries rather than one large set. 

Any one catch what I used for a resistor in the post below?
  
Back to top
 
IP Logged
 
Magicpaddler
Inukshuk
Offline



Posts: 1321
Location: Chicago Burbs
Joined: Jan 7th, 2004
Re: Depth finder power source
Reply #77 - Apr 9th, 2014 at 11:11pm
Quote Quote Print Post Print Post  
Thanks to Quentin and zski for the loan of fish detectors.  About 2 hours taking data on Whalon puddle and then plotting it up and this is what I get.

(You need to Login or Register to view media files and links)

So the deeper you go the more current you draw but for most detectors not more than 20%. By the way the detector that I liked the best is the Lowrence X-4
  
Back to top
 
IP Logged
 
Puckster
Inukshuk
Offline



Posts: 1208
Location: St. Paul, Minnesota
Joined: Feb 10th, 2009
Re: Depth finder power source
Reply #78 - Apr 10th, 2014 at 2:56am
Quote Quote Print Post Print Post  
My calculations:

Take the square root of your mother's hat size and divide it into the weight of your fish locator = the number of LI AA's to bring on a trip.

puckster
  
Back to top
 
IP Logged
 
zski
Inukshuk
Offline



Posts: 447
Location: IL
Joined: Sep 30th, 2010
Re: Depth finder power source
Reply #79 - Apr 10th, 2014 at 7:09am
Quote Quote Print Post Print Post  
MP: So how deep does that "Whalon puddle" actually get?
  
Back to top
 
IP Logged
 

 
  « The Put-In ‹ Board  ^Top