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Joined: Dec 2013
Posts: 1,123
Former BMW Rider
I can tell you firsthand that the step down charger works fantastic! My elliptical machine required 4 Size D batteries. I used an old charger from one of the kid's video games with 9V DC output. The battery terminals have been connected with the step down charger which has been set at 6.2V DC.

No more batteries.......

Thanks for the tip Deve!


His: 1947 Chevrolet 3104 []
Hers: 2008 American Saddlebred []

"I proudly Stand for the Flag and Kneel for the Cross" Unknown
Joined: Feb 2002
Posts: 12,860
Cruising in the Passing Lane
old computer power supplies work well for powering 3V, 5V, 12V DC stuff in the shop and home


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details [] & TF heater pics []
Joined: Dec 2000
Posts: 3,543
Gas Pumper
Very true Bill! Lots of people have them lying around too. What the circuit that I suggested in my rant does however is augment that capability to give you all of the in-between voltages with resolutions in the millivolts. Any combination of battery operated stuff can be made battery-less.


1950 Chevy 3100 Deluxe Cab
1950 Chevy 3100 Standard Cab
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More info and tips at Deve's Technet
Joined: Jun 2005
Posts: 426
Shop Shark
On my 6 volt 53 that works fine with my cell phone... until I true the lights on at whatever RPM... check it out.

Note: I used another adapter for the cigar lighter socket and there was no problem when the lights were turned on??

Last edited by AD_Pickup; Thu Feb 18 2016 01:39 AM.
Joined: May 2005
Posts: 9,189
Sounds like to much voltage drop due to the draw the f the headlights. I'd first check and clean connections and then evaluate if the cigar lighter is connected and grounded at ideal locations to minimize effects of voltage drop from other loads.

1951 GMC 250 in the Project Journals
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Joined: May 2005
Posts: 1,638
Shop Shark
The reason all of us have things working with a 6 volt battery is what's called 'TTL' logic. It is based on bi-polar transistors and is 5 volt based. 0 volts is low and 5 volts is high in a binary operation.

Six volt guy living in a twelve volt world
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