For brightness of LED a smaller LED is use because it more brightness from the big LED. Different designs have been created that incorporate various types of LEDs into a light fixture. The current trend is to use high power 1 watt LEDs, but some companies use low power LEDs in their products, including several low power LEDs packed together to perform the same purpose as a single high power LED. The shape of the LED street light depends on several factors, including LED configuration, the heat sink used with the LEDs, and aesthetic design preference. Heat sinks for LED street lights are similar in design to heat sinks used to cool other electronics such as computers. Heat sinks tend to have as many grooves as possible to facilitate the flow of hot air away from the LEDs. The area of heat exchange will directly affect the lifespan of the LED street light.

LED street light beam pattern

Before this the sensor that had been decide to use for this project is digital infrared sensor. As known this project need    had a prototype and this sensor been selected because the specification of this sensor is suitable with the prototypes that need to do. Below is the specification of this sensor:

Specification:

Diffuse reflective type
Light source: Infrared
Sensing range up to 30cm
Input voltage: 6-36VDC
NPN output
Dimension: 1.6cm (D) x 6.7cm (L)

Result from test:

5V can be use to power, maximum dectection distance is ~20cm
12V, maximum dectection distance is ~ 60cm
30V, maximum dectection distance is ~ 80cm
All above test is using Cytron's white box as obstacle, in our lab.

Briefing final year project 1 for the second times where in this briefing the committee brief about the presentation. The committee brief what should do and the contents should put in the slide show during presentation day.

Circuit had been construct and run the program to try either it get the same result as want for this project.

Try n error circuit

From what had been done the result that get when run the program, the result that showed is not as what that wanted and it maybe had problem at the programming.