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Author Topic:  F1 basic battery mod  (Read 1920 times)

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LazyTrommel

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F1 basic battery mod
« on: May 26, 2014, 19:50 »
Simple mod saved me 400 grams in weight.. lasts about 6.3 hours though voltage is dropping quick.. gotta love the power regulator in this machine.. battery drops below 6v.. no problem, charge the caps and keep on going ..

battery caddy 2 clamps, plug and socket.. done.. also works with a Lead Acid battery 6v 4.5amp or >spring cord, minelab harness.. :) you saved yourself 300 grams on the arm, and can go all day :D
Now i just need to route the power socket to the "front/back" panel.. 

Offline ray.m

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Re: F1 basic battery mod
« Reply #1 on: May 26, 2014, 20:59 »
That's great life out of 4 AAs, my quick day test near Laanecoorie, I reckon I only got 4 hours out of 8 AAs in the AA to D case (regular duracell).

I have put together a little setup with a 12v to 6v buck converter to use an rc 3S LIPO, as a back up have also put a standard 4pin in to use 6v sla on a harness or bum bag, with a on/off switch between the buck and the 4 pin so there is no back flow to the converter.

This connects to the power accessory socket with the milspec cable connector (mongrel of a price tho).

All in a little fishing tackle box to slip into the dd leather cover.
  • Detector(s) owned/used: Ace 250, AT Pro (US), SDC2300, GPX4500

LazyTrommel

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Re: F1 basic battery mod
« Reply #2 on: May 26, 2014, 22:31 »
That's great life out of 4 AAs, my quick day test near Laanecoorie, I reckon I only got 4 hours out of 8 AAs in the AA to D case (regular duracell). I have put together a little setup with a 12v to 6v buck converter to use an rc 3S LIPO, as a back up have also put a standard 4pin in to use 6v sla on a harness or bum bag, with a on/off switch between the buck and the 4 pin so there is no back flow to the converter. This connects to the power accessory socket with the milspec cable connector (mongrel of a price tho). All in a little fishing tackle box to slip into the dd leather cover.

I ordered the milspec plug from RS, made up the battery pack using the 6v SLA... but even with a coil cable it got in the way, and basically annoyed the hell out of me..

Battery life is due to the additional pull up capacitor.. though 6 hours would be more like 3-4 constant use.

I like your use of the Libo battery, I've got a box full of Turnigy 2200 mAh packs... The only thing i don't like about lipo's is the fact that they do on occasion explode (RIP AXN CLOUDS FLY) :( 

Maybe externally would be okay.

Spudee

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Re: F1 basic battery mod
« Reply #3 on: May 27, 2014, 17:15 »
Ah, are you blokes speaking English?
« Last Edit: May 27, 2014, 19:06 by Spudee »


Offline Rwork

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Re: F1 basic battery mod
« Reply #4 on: May 27, 2014, 17:20 »
Wondered if someone would have a comment.  :)
  • Detector(s) owned/used: Owned,Two Mlb 5000. Sovs,GT and XS, Ace 250's.
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LazyTrommel

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Re: F1 basic battery mod
« Reply #5 on: May 27, 2014, 17:53 »
Okay so, picked up a couple batteries, 6v 4500 mAh SLA battery, 6000 mAh SLA also..

I've got the detector running currently in the garage, 12v fan pwm circuit running it at 4 rpm, swinging a ruler a glued to the top of it with a nugget taped to the end "bit of lead" making the machine sound off constantly.
also used a 555 timer chip to monitor the voltage on the Capacitors inside the F1.. the second they stop charging the whole thing shuts off and stops my 7 segment display timer cricuit..

All this just to test battery life..  :) 

Ah, are you blokes speaking Ebglish?
Wondered if someone would have a comment. :)

Electrical Engineering is cool..
« Last Edit: May 27, 2014, 17:54 by LazyTrommel »

Offline bmzgold

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Re: F1 basic battery mod
« Reply #6 on: May 27, 2014, 21:30 »
Hi Guys
this is my first post, so any help will be muchly appreciated.
i have finally got a F1A4 and am still trying to figure out a few mods to it, i want to do the coil conversion, change headphone socket and install a GB button, i think i have got most of it figured out , but still trying to figure the head phone socket and how to wire it so it still works to disable the speaker and function properly and what i am suppose to do with the yellow wire.
also i am thinking about changing the battery setup to use 4 x 18650 lithium's wired in 2s2p configuration  giving me a 7.4v 9000mah battery pack my, y question is will the internal regulator handle the peak of 8.4v given out by a fully charged pack or would i need to add a second regulator to as not to damage the internal one.
thankyou
kind regards
  • Detector(s) owned/used: x-terra 705, minelab f1a4

Offline ray.m

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Re: F1 basic battery mod
« Reply #7 on: May 30, 2014, 21:09 »
Hey LT, how'd you go with the battery test?

cheers
ray
  • Detector(s) owned/used: Ace 250, AT Pro (US), SDC2300, GPX4500

LazyTrommel

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Re: F1 basic battery mod
« Reply #8 on: May 30, 2014, 21:30 »
The SLA 6v 4.5 amp hour battery ran for 8.2 hours.. which isn't too bad for a full charge, plus i was running the booster off it also.. 

the AA's basically crapped out within 3 hours the second time around, so i switched to 8 AA 2 sets of 4 running in series, got just over 5 hours out of those.. I'm thinking AA is not the way to go.

Oh and i just completed modding 2 machines a friend purchased.. they're somewhat different from mine, much older models, speaker shielding, and the whole thing was grounded to the case..


Offline Rwork

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Re: F1 basic battery mod
« Reply #9 on: May 31, 2014, 09:56 »
Guessing your machine is drawing around half an amp,pretty heavy for AA's. I wonder what the new Mlb is drawing. Do they have rechargable C cells or is it disposables ?
  • Detector(s) owned/used: Owned,Two Mlb 5000. Sovs,GT and XS, Ace 250's.
  • Oldest find: Ancient gold and 1797 cartwheel penny.

LazyTrommel

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Re: F1 basic battery mod
« Reply #10 on: May 31, 2014, 11:34 »
Steve, of detector prospector mentioned something about a set of rechargeable batteries coming with the machine.. I should hope so for that money..

I'm really tempted to pre-order one, thanks to my new job I'm actually in the money for once lol. 

LazyTrommel

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Re: F1 basic battery mod
« Reply #11 on: June 05, 2014, 00:07 »
New battery setup,  7.4v 7800 mAh battery ... better life than the SLA battery, lighter too..

The other option was 16x AA batteries, paired 4x 6v = a buttload of mAh lol however! days of charging, 

LazyTrommel

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Re: F1 basic battery mod
« Reply #12 on: June 13, 2014, 16:06 »
Pro tip, if you run the detector on more than 7 volts you risk burning out the coils in the regulator transformer.. keep it below 6.5v to be safe..

Offline bmzgold

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Re: F1 basic battery mod
« Reply #13 on: July 10, 2014, 18:31 »
Hi
if any one is looking for a dc-dc buck converter for there battery mod, i thought you might be interested in this one
http://www.ebay.com.au/itm/DC-Buck-Converter-voltage-Step-Down-CC-CV-Adjustable-Power-Supply-Module-LM2596/171003176697?_trksid=p2050601.c100103.m2451&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20140211150826%26meid%3D8211750029292634695%26pid%3D100103%26prg%3D20140211150826%26rkt%3D4%26clkid%3D8211752026821895655&_qi=RTM1714243 
sorry not sure how to set it as a link
it allows you to set the
voltage 
current
charge indicator
 takes a little bit of fiddling around with a multimeter , and variable power supply 
but works a treat
  • Detector(s) owned/used: x-terra 705, minelab f1a4

LazyTrommel

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Re: F1 basic battery mod
« Reply #14 on: July 10, 2014, 18:42 »
Not a bad idea, whack that in front of a 15Amp hour 12v Gel Cell.. and you're good for days..

Offline skyv

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