Forum Discussion
MEXICOWANDERER
Dec 20, 2017Explorer
TWEAKING VOLTAGE to your liking.
A rough voltage setting can be easily done before connecting the power supply to the battery.
A digital voltmeter and a tiny straight blade screwdriver can be used. How tiny of screwdriver...one with a blade width about the width of the wooden end of a kitchen match.
BE CAREFUL AROUND EXPOSED HIGH VOLTAGE SCREW TERMINALS you attached the cord and rocker switch to. Seal up the three terminals with silicone sealant and let it cure before handling a plugged-in power supply.
BE SURE to throw the slide switch hidden on the side to 115V
Plug it in.
Read volts on the meter
The orange cap block to the left side of the terminal strip is the adjustment. It is incredibly touchy. Voltage jumps quickly so don't be surprised when it does.
Clockwise to increase voltage.
The Negative wire from DC - terminal strip runs directly to the battery negative post.
The Positive wire from DC + runs to the 12 volt light bulb base which has two terminals underneath. Doesn't matter which is which. Hook the wire from the converter to one screw. Then from the other screw run the wire to the battery + positive terminal.
The light bulb filament has resistance. Filaments are not perfect current regulators - but, they are definitely good enough. At 16 volts the 50 watt bulb will permit a shade less than 5 amps current, and the 100 watt will permit close to 10-amps (close enough).
A rough voltage setting can be easily done before connecting the power supply to the battery.
A digital voltmeter and a tiny straight blade screwdriver can be used. How tiny of screwdriver...one with a blade width about the width of the wooden end of a kitchen match.
BE CAREFUL AROUND EXPOSED HIGH VOLTAGE SCREW TERMINALS you attached the cord and rocker switch to. Seal up the three terminals with silicone sealant and let it cure before handling a plugged-in power supply.
BE SURE to throw the slide switch hidden on the side to 115V
Plug it in.
Read volts on the meter
The orange cap block to the left side of the terminal strip is the adjustment. It is incredibly touchy. Voltage jumps quickly so don't be surprised when it does.
Clockwise to increase voltage.
The Negative wire from DC - terminal strip runs directly to the battery negative post.
The Positive wire from DC + runs to the 12 volt light bulb base which has two terminals underneath. Doesn't matter which is which. Hook the wire from the converter to one screw. Then from the other screw run the wire to the battery + positive terminal.
The light bulb filament has resistance. Filaments are not perfect current regulators - but, they are definitely good enough. At 16 volts the 50 watt bulb will permit a shade less than 5 amps current, and the 100 watt will permit close to 10-amps (close enough).
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