Smart lighting system for rose / Wan Muhammad Lukman Wan Zainudin, Zulkifli Azhar and Syahmi Salim

Rose flowers need extended sunlight for optimal growth. Rose need light at night to do photosynthesis for extend the length of rose stem. If neon light not replace with sunlight at night, the rose flower will bloom at night and stop the photosynthesis. Sometimes, neon light will fee off because of power failure. For the last, neon light will turn off at night such as 12 a.m. to make sure the rose flower will bloom perfectly wife suitable stem. So, this project replace sunlight with neon light at night because the properties of neon light same with the sunlight The automatic switch circuit will turn on fee neon light if there are no sunlight. The Light Detector Resistor (LDR.) are used as a sensor to detect fee presence of sunlight During daylight, LDR will turn off fee neon light because it sensing fee presence of sunlight. LM358 and LM258 op-amp have two input and one output which input is inverting at pin#2 and non-mverting at pin#3. Without sunlight, voltage at pin#3 is higher than voltage at pin#2 and fee neon light will turn on. When voltage pm#3 is low than voltage at pin#2, the neon light will turn off. NE555 timer acts as a free running oscillator. It will generate fee frequency when high pulse is applied at RESET pin. The frequency of NE555 timer varied by varying resistor values R3, R2 or by varying the capacitor value Ci. Next, few features added in this project which are automatic light and alarm system. By the say, in this project we change fee neon light wife normal bulb because it difficult to find neon light from electronic shop. Normal bulb also can do photo synthesis but it not same wife neon light or sunlight.