For the last few days I have been trying without any luck to find a good tutorial on simple circuit simulations. I am a relatively new hobbyist and I figure if I use simulations and play around the circuit and see the output I would learn more. Can you please direct me to a simple tutorial which teaches simulation of circuits.
If you are on Windows I would download a copy of LTspice from Linear Technology. IIRC there is a tutorial in the download. If not it is on their website.
LTspice is very quick to get started with. A major advantage is that the package comes with all of the semiconductor models for the LT parts. Most models are copyright and end up having to download them from the manufacturer. This can be a major source of difficulty for people getting started.
Once you have the software I would start with a very simple circuit like a voltage source in series with a resistor in series with a capacitor. Setup your probes to plot the voltage across the capacitor and the voltage across the resistor. This will enable you to learn the quirks of the tool and hopefully get some instant gratification.
Make a copy of the simple circuit and start to add new elements to the new circuit.
Here is a java applet that allows you to simulate your circuits, I find it very useful, (dont have to make a whole new SPICE simulation.. :P )
This similar question lists a variety of circuit simulator options, including CircuitLab. It is a simple browser-based circuit simulator that lets you share your circuits with others. I've just started using it and have, so far, found it quite useful.
For your purposes, checking out the circuits that others have shared may be beneficial.
You can start designing your circuit on a Circuit Simulator. You can learn Spice Circuit Simulations Using LTspice. LTspice is available free from Linear Technology. LTspice is perhaps one of the most widely used free simulators. It is a powerful simulator with a simple interface to handle. For learning LTspice You can refer to the following link: Electronics circuit Spice Simulations