Basic devices made with electronic components.

Electronic components are usually used to build devices:

TIMERS.

It is a device that operates for a period of time and shuts itself off automatically. A timer works in a circuit by that way:

∎At first, when we push the button, a current flows and pass through the base of the transistor, and then the LED turns on. The capacitor begins to store electric current.
∎When we reléase the button, the LED stills on for a period of time, using current from the capacitor. Finally, when there isn´t more current in the capacitor, the transistor cuts off and the LED turns off.

INTEGRATED CIRCUITS.

They consist of miniature electronic components, for example capacitors, transistors and resistors.