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Abstract. This paper has developed the circuit of equipment for CCTV operation and detecting failure, which enables to identify in naked eye failure of CCTV which is used to protect public facility and prevent safety accident. It is designed with shunt which has 0.5ohm, maximum current of 1A and over 0.5W class(P = 1A 2 * 0.5 and 10bit ADC in which built in MCU. Also current has been designated using VR(Voltage Regulator) as reference current. Status light of voltage and current is 2 color LED while green color means normal status and red color does abnormal status.

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