The purpose of the presented project is to monitor up to four micro cam sequentially through a monitor. It also has an infrared presence sensor, output via relay to activate lamps that assist in the vision of micro cam, if installed in dark places, output to feed micro cams and a 5-inch TV monitor. An astable is responsible for the sequence that determines which micro cam is being activated through a 4017 counter, from which only 5 of its outputs are used. Four of them (4017) are connected to a set of analog keys (4016). Through the common cathode display we have the indication of which camera is being activated. Through CN-1 we jump how many micro cams will be installed in a total of up to 4. The warning system is monitored by an infrared sensor. When its beam is cut, a 12 V piezoelectric horn is activated.
