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Old 02-26-2016, 08:33 AM   #1
Radiolocman Robot
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Default Discussion: Short-Circuit Protection in DC Low-Voltage Systems

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Pratik Panchal Many a times you need to power an adjoining accessory circuit from the power supply used in the main module circuit. Here is a circuit to derive the additional power supply from the main circuit.
More: Short-Circuit Protection in DC Low-Voltage Systems
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Old 02-26-2016, 08:33 AM   #2
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Hi Pratik Panchal,
I have tested my power supply with your short-circuit protection. I replace BC547 by 2SC1815, SK100 by 2SB772. Short-circuit protection is great but when i'm using with 1.5A load (include 3 Ohms resistor) then power cant operate. All of led (red and green) is turn on but weak light. I think PNP transistor isn't saturation and i have replace 270 Ohms resistor by 220 Ohms but it's still not ok. Can you help me?
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Old 02-29-2016, 09:02 PM   #3
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hello, Uoc

check options h21 ( BC547 - 2SC1815), (SK100 - 2SB772)
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