You are to design a battery charger for safe operation in a damp garage environment to use for charging your 12 VDC car battery.

Design specifications include:

• Input is a 110rms VAC. (VP=110x ) at 60 Hz from a three-wire service that meets the National Electrical Code.
• The output is a nominal 12 volts VDC at the cathode of the diode.
• Specify a resistor, R, to limit the maximum battery charging current to 10 amperes into the 12-volt car battery assuming the battery is completely dead (0 volts) when you first connect the charger.
• There is no ripple voltage design specification. Explain why this is unnecessary in this application.
• The battery charger case is metal.
• Assume a diode with VF = 0.7 V
• The fuse in the primary circuit is to protect the power supply from a short-circuit at the battery terminals either from the total battery failure or accidentally short-circuiting the charging cable to ground.

Your Design must include:

1. Key design equations and supporting calculations
2. Component specifications including:

• Transformer-turns ratio
• Diode-current and power ratings
• Your assessment and short discussion as to whether the laboratory 1N4001 diodes could be used
• Value for R1 serving as a current limiting resistor
• Current rating of a fuse in the primary circuit to protect the power supply against a short circuit condition at the battery terminal.

RI Curreng Recor FR 12V C B