I used to have a software where you could virtually create an electronic circuit and test it. I am drawing a blank and cannot think of the name. Anyone remember / use the software ?? What was it called ?? Is there something similar ??

I got a scanner, i know it got a very simple circuit board because i open it once, but it need warm up if i didn’t use it for a month, if i use it yesterday, it won’t require warm up to function as normal. So what is the component that need to replace, i suspect it would be the capacitor, if it is the case, would the big capacitor fail 1st or the small one. Any electronic repair expert kindly give me some ideas, thanks.

Circuit diagrams show how electronic components are connected together. Each component is represented by a symbol and a few are shown here:

Circuit diagrams and component layouts
Circuit diagrams show the connections as clearly as possible with all wires drawn neatly as straight lines. The actual layout of the components is usually quite different from the circuit diagram and this can be confusing for the beginner. The secret is to concentrate on the connections, not the actual positions of components.