So, this is for people who want to be able to read schematics and know how things work. Please note that this article is for educational purposes only. Only qualified personnel should carry out any electrical work. I accept no responsibility for loss or damage, consequential or otherwise, caused through the use of information contained in this article. Nor do I encourage non qualified persons to modify or repair electrical equipment of any kind.
Electricity can kill, pass any electrical work requirements to a qualified person.
The circuit below shows a guitar pickup connected to a resistor. This simply means that the pickup generates an electrical current, which travels along the two wires and goes into the resistor and becomes heat. In our circuit there is a red and a black wire connecting the two items. It is also good practice to draw schematics showing the signal path going from left to right. In this example the signal starts life in the pickup and is used up in the resistor.