WARNING: Electricity can be deadly! Capacitors will hold charge even when disconnected! This type of charger can damage batteries if built or used incorrectly. This video is a build documentation only, and does not claim to teach correct or safe practices.
Pr-assembled units can be purchased from Electronic Enterprises
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Parts List
Large Capacitor (larger batteries, or battery banks, require larger, and/or more, capacitors)
45 5 uf Round Capacitor ($15) (this is the one we used)
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Bridge Rectifier, 1000v 25a ($3)
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120v (for USA) Power Supply Cord Cable ($7)
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Battery Terminal Clamps ($12)
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3-way Switch ($5)
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Programmable Timer Switch ($25)
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6 x 6 x 4 PVC Box ($25)
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Cheap Voltmeter ($12 online. These practically free at Harbor Freight)
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Heat Sink ($10 or build your own from 1/4" aluminum bar)
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Wire-nuts, screws, wire spade connectors.
Tools
Wire Strippers / Cutters ($7)
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Stepper Drill Bits ($10)
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A drill and a saw
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