Even though there are fuses in the car, resetting a circuit breaker is a lot easier than buying and replacing a “one-time-use” fuse. This circuit is simple, uses a handful of readily available parts, is completely electronic, and has a very fast cut off time. A picture of the completed circuit breaker and remotely located FET/Rsense is shown in Figures 1, 2, and 3. Also shown is the completed project PC board. This application is used in a high-amp, low voltage DC supply.
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Circuits 2005-10 (Figures 5&6 Printed Circuit Board layout)