Here is a solution to protect your circuit assembly on Bread board. Usually we test the working of a circuit first on bread board before making the PCB assembly. Sometimes due to mistake in wiring, valuable components may destroy through short circuits. With the power on , we still continue the trouble shooting which may further destroy many components. Only after sensing heat or burning, we realize the problem. So here is the simple solution to assemble the circuit on bread board safely. If there is any short circuit in the bread board, the power to the board will cut off and Red LED lights. So immediately we can detach the board from power supply.
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