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There is a huge difference in these two..... Laptops having LED Screens has back up time upto 16, 18 Hours.... how it is possible i can explain.....
LCD is Liquid Crystal Display we all know LCD need a back light to display.... in formal displays LCDs uses LEDs in back to display Data...
Wifi stands for Wireless Fidelity..... Range depends at many factors,,,, like Transmitter Power mean which type of wireless router you are using for network set up..... Normal TP Link and D Link Routers with 4 Ports Provides a Range of 300 Feet Radius.... but in some areas wi fi range is 28000...
it is possible to charge your Lappy with Solar for this you have to make an inverter 12V DC to 220v A.C,,,, :) then use your Laptop's Original charger...... it will works like this
<<Solar Panel_____12v Battery_________Inverter_________Laptop Charger____________Laptop___>>>>
why u are using 555??? Make it like this .... <<< uC_____MOC________BT136>>> use PWM and set firing angle of BT 136....
if u didn't use MOC then u have to use a zero crossing detector! MOC series have built in Zero Crossing Setup..... use following circuit...
you have to use Hit and Trial Method to get exact results...... Try to make you program in less lines use less instruction avoid any delay..... better to get data of this sensor using Interrupt.... u know minimum instruction handling time in 1 us so if u use a delay then out put of sensor will...
Best and Cheap is Proteus....... Proteus uses less system resources less in size and easy to operate........
So in my opinion u should have to use proteus..... you can find its full version easily by googling it.....
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