Components --------------- Two types of electronic components: 1) Active: Source of energy (includes amplifying components such as transistors). 2) Passive: Cannot introduce energy into the circuit. .. note:: You can design svg circuits using the `Electrical Symbols Library `__: .. image:: figures/esl.svg :align: center :width: 200px Generators ^^^^^^^^^^^^ .. include:: esl.rst There are two important generators to know: 1) Current generators |igen_c| that strive to maintain constant current on his terminals. Arrow must point towards the current direction (`source `__). 2) Voltage generators |igen_v| that strive to maintain constant voltage on his terminals.