Answer Some Questions

• What is a Schematic Diagram - a schematic diagram is a representation of what a system of electronics includes and how it works.
• What is a Resistor - a resistor is an electronic device that restricts the flow of electricity through a circuit.
• What is a Rectifier Diode - a rectifier diode lets electricity flow only one direction in a circuit. It is mainly used for power supply operation.
• What is a capacitor - a capacitor is an electronic device that stores an electrical charge.
• What is the difference between a "polarized capacitor" and "non-polarized capacitor" - the difference between these two capacitors is that a non-polarized capacitor can be connected both ways in a circuit and the polarized can be connected only one way.
• What is an LED - an LED (or light emiting diode) is a diode that emits light when it is activated.
• What is a Transistor - a transistor can amplify or decrease the amount of electricity flowing through a circuit.
• What is a Relay - an electrical device that is activated by a current or signal in one circuit to open or close another circuit.
• What is Analog vs Digital Signals - Here is a main difference between analog and digital signals, analog is physical and digiatl is lighted displays.
• What is a Variable Resistor - variable resistors are resistors which can be tuned to different amounts of resistance.
• What is a Piezoelectric Buzzer - piezos buzzers are buzzers noises that are perfect for alarms. They contain a very thin plate inside the housing that moves when an electrical current is applied.
• What is a PowerSwitch Tail - a powerswitch tail can safely control an appliance that runs from the wall socket, such as a heater, lamp or another device with a digital output from your arduino.
• What is a pull down resistor - are used in logic circuits to ensure that inputs to the arduino settle at expected logic levels if external devices are disconnected or high-impedance.
• Why do we need a diode with a transistor + motor circuit - we need a transistor in the circuit because it will keep the electricity from flowing into the arduino and shorting it out.