1. Solar Powered Stop light The stop light consist of three main parts. The power source The Power converter/controller The stop light There are also a Remote control and a receiver placed inside, which allowed users to control the light on the stop light.

2. We are using a 12 volts sealed lead acid battery. The battery giving 5-Amp per hours charging time. The battery is being use as a back up power. The solar panel is the main power source. We are using a 6 by 12 inches, that provide a 20 Voltages and 100mA short circuit in a full sunlight. The a above circuit diagram is a charger that will drop the 20 volts given by the solar panel to 12 volts, the amount that will need to charge the battery. The charger also have another unique functions that it will indicate the user when the battery is full by light up the LED. It’s prevents the battery form over charging.

3. The stop light was originally consume a 110 Voltage AC. But we have to rewired the circuit so that it only have to use a 12 volt DC battery. We are using a radio frequency (RF) transmitter and receiver, since the Inferred (IR) doesn’t work well in the bright sun light. The sun light would have interfere with the Inferred signal we had replaced all the light bulb that generate more heat that light with a multiple of high efficiency ultra-bright LED. The stop light will be use outside, So the Radio Frequency would transmitter and receiver would be best for the situation.