CTyler
Veteran Member
You can put a cap on he output of the charger to smooth out the pulsed DC. A 35 volt 4700 micro farad cap would work. I did this to a batt charger 15 years ago to use as a power supply for sensitive peak charger.
Saving $ on electric filler pump (ideas?)
- Thread starter DiskDoctr
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CTyler
Veteran Member
I went and looked at the manual for recomendation and it says 25 volt 4700 micro farad. Any voltage above that will work fine. The max amp draw for the peak charger is 10 amps. This will smooth it out but at higher amp draws a larger cap would smooth it
out even more.
Basically it takes the pulsed DC, looks like a square wave on a scope _-_-_-_ and makes it more of a modified saw tooth shape_/-\_/-\_. The cap discharges and provides current between pulses. Can't do any justice to the wave forms on the keyboard, but you get the idea. The larger the cap the more current its able to store to a point.
To add.....
This would work ok however if I were doing it I'd get a $18 lawn tractor batt and use that as has been suggested. That way I don't have to find the charger every time and drag a cord over there.
out even more.
Basically it takes the pulsed DC, looks like a square wave on a scope _-_-_-_ and makes it more of a modified saw tooth shape_/-\_/-\_. The cap discharges and provides current between pulses. Can't do any justice to the wave forms on the keyboard, but you get the idea. The larger the cap the more current its able to store to a point.
To add.....
This would work ok however if I were doing it I'd get a $18 lawn tractor batt and use that as has been suggested. That way I don't have to find the charger every time and drag a cord over there.
Junkman
Super Member
How much differance in price between the 110 volt and 12 volt unit did you say? I am beginning to think that this might have been false economy...
Wannafish
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Ran into a similar problem on Sunday. Had hay to rake and bale but tractor was low on fuel, so pulled it up to the fuel tank. No fuel came out of the nozzle on my gravity feed fuel tank /forums/images/graemlins/shocked.gif. Darn thing is empty /forums/images/graemlins/frown.gif.
Hmmm...what was that thread I read on TBN? Don't have an electric pump so I grabbed a hand crank pump out of the garage and stuck it in the 500 gallon Fuel Oil tank that feeds our furnace. /forums/images/graemlins/laugh.gif
My arm was tired by the time I finished the first 5 gallon jug /forums/images/graemlins/crazy.gif, and with 3 more jugs to go I improvised. Took the nut and handle off the pump, found a pipe fitting that threaded on the shaft, put a bolt thru the fitting with a nut on the backside...added my Dewalt 18volt drill to the combination and I was in business. /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif
Got thinking about the "anti-theft" value afforded by the removal of the drill and decided I came up with a novel idea that I should share with my friends here on TBN!
BTW...if you get all excited when you come up with what you think is a great idea...don't show your wife. At least not if she is the one responsible for paying for the heating fuel /forums/images/graemlins/shocked.gif /forums/images/graemlins/frown.gif /forums/images/graemlins/mad.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif.
Hmmm...what was that thread I read on TBN? Don't have an electric pump so I grabbed a hand crank pump out of the garage and stuck it in the 500 gallon Fuel Oil tank that feeds our furnace. /forums/images/graemlins/laugh.gif
My arm was tired by the time I finished the first 5 gallon jug /forums/images/graemlins/crazy.gif, and with 3 more jugs to go I improvised. Took the nut and handle off the pump, found a pipe fitting that threaded on the shaft, put a bolt thru the fitting with a nut on the backside...added my Dewalt 18volt drill to the combination and I was in business. /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif
Got thinking about the "anti-theft" value afforded by the removal of the drill and decided I came up with a novel idea that I should share with my friends here on TBN!
BTW...if you get all excited when you come up with what you think is a great idea...don't show your wife. At least not if she is the one responsible for paying for the heating fuel /forums/images/graemlins/shocked.gif /forums/images/graemlins/frown.gif /forums/images/graemlins/mad.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif.
Soundguy
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Using a capacitor to filter DC has it's limitations. Under high load situations.. there simply won't be enough stored energy in the cap to filter out the troughs and keep a steady DC line.
On the other hand.. a motor running doesn't need pure clean DC like oh.. say.. a logic circuit does.
If you were running into emi nois on a radio nerby I would also go with a L or Pi filter.. but then.. we are getting into a 60 dollar fix.. and the original poster wanted a cheapy soloution...
Again... hard to get by that cheapy battery and flot charger idea...
Soundguy
On the other hand.. a motor running doesn't need pure clean DC like oh.. say.. a logic circuit does.
If you were running into emi nois on a radio nerby I would also go with a L or Pi filter.. but then.. we are getting into a 60 dollar fix.. and the original poster wanted a cheapy soloution...
Again... hard to get by that cheapy battery and flot charger idea...
Soundguy
Junkman
Super Member
After replacing a few of those batteries in coming years, the sweetness of the savings will become more sour than the original cost of a 110 volt unit. I have a 110 volt unit for the past 20 years and it still works like new. I also have a spare unit that I have never used and I am tired of moving it around the garage. Anyone close to MA/CT/RI border that needs one can purchase it reasonably from me. I believe it to be too heavy to ship any distance because of shipping costs today, but it might be worthwhile for someone that has a need for a unit like this.
Soundguy
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I will agree that if you figure in long term expense, the 12v unit will be more expensive if it uses its own battery. I didn't get the idea that this was a long term deal.. but more of a simple 'rig' for fuel.
Of course he could eliminate the redundant battery and power it off the tractor as another poster had sugested. Something as simple as a cig lighter hookup.. etc
Soundguy
Of course he could eliminate the redundant battery and power it off the tractor as another poster had sugested. Something as simple as a cig lighter hookup.. etc
Soundguy