* Download eSim ans Sky130 Library file by clicking on the link below
   https://esim.fossee.in/downloads
   https://static.fossee.in/esim/installation-files/sky130_fd_pr.zip
* Installed and learned how todesign and simulate the circuit using esim and ngspice by using Sky 130 nanometer technology
* To understand the complete working of esim I went through the online courses sent by FOSSEE team
* I designed 2 bit DAC which is basically potentiometer/ voltage divider based Digital to analog converter which includes following steps
1. Draw a simple switch circuit using esim schematic by making use of MOSFET's, wires, Port for supply, ground and Power flag
2. Once the circuit design is done the electrical rule check has to be done to check whether all circuit elements and power elements are connected proper or not
3. Once  ERC test is done next step is to obtain the netlist of the circuit by clicking on create netlist on top tool bar
4. After creating netlist file  edit the netlist in notepad and include sky130 library file and change the components to sky130 component type which is available inside library in cells folder
5. Once the netlist is edited, the .cir file is made to run using ngspice to obtain input and output waveform.

Similarly Same steps were followed during design of CMOS INVERTER circuit  