RC circuit
The following example shows the contents from a small LTspice schematic file for a simple RC circuit with four schematic symbols: V1 is 10 volt DC voltage source, R1 is 1K ohm resistor, C1 is 1 uF capacitor, ground. The bottom three TEXT lines are: 1) a transient simulation directive with a stop time parameter of 10 ms (codice_43), 2) a SPICE directive to set the initial condition of RC "out" net to zero volts (codice_44), and 3) a text comment (title).