Oscillator Design:An astable multivibrator can be used as an oscillator. Here an astable multivibrator using 555 timeris designed. We know, frequency of oscillations for a 555 timer in astable mode is given by: f = 1.44/(R1+2*R2)*C where R1 is the resistance.
[pdf] How to make 3.7 v to 220v simple inverter | Converting Low Voltage to High Voltage In this informative video, we'll guide you through the process of creating a simple yet effective inverter that can convert a low voltage of 3.7 volts into a powerful 220-volt output.
[pdf] 10200W pure sine wave hybrid inverter with up to 95% efficiency seamlessly converts 48V DC to 220V AC power and vice versa. Compatible with the grid, solar panels, and generators, it offers versatile power options.
[pdf] 
