What is cathode?

What is anode?

What does a resistor do?

Why is a resistor important?

True or false: V=IR, I=V/R, R=VI are the equations for ohm's law

This component is like a battery but with very low capacity. It can be used to introduce a time delay in a circuit. It can also be used to make the power supply of a circuit more stable.

Electrolytic Capacitor

Ceramic Capacitor

A ceramic capacitor can be connected any way in a circuit, it does not have a negative or positive leg

An electrolytic capacitor needs to be connected properly because it has a positive and negative leg

Is this true about the difference between NPN and PNP transistors? The difference between both transistors is that in an NPN transistor a positive voltage is given to the collector terminal to produce a current flow from the collector to the emitter. Now unlike the NPN transistor, a PNP transistor is basically flipped a positive voltage is given to the emitter terminal to produce a current flow from the emitter to the collector.

What component's symbol is this?

What component's symbol is this?

Which ones are the correct names for the terminals of a transistor? (SELECT ALL THAT APPLY)

An extrinsic semiconductor that has been doped with electron donor atoms.

An intrinsic semiconductor doped with boron or indium.

A point or area where multiple conductors or semiconductors make physical contact.

How is an electrical junction applied to transistors?

When the current through the inductor stays the same the built-up energy in the magnetic field will resist the current by changing the resistance of the inductor

When the current through the inductor changes, the inductor stays the same and does nothing

555 timers are used for timer, delay, pulse generation, and oscillator applications

Which ones are some of the correct names of the pins on a 555 timer? (SELECT ALL THAT APPLY)

What component's symbol is this?

Allows current to flow "backwards"

Which ones are the correct names of the pins on a MOSFET? (SELECT ALL THAT APPLY)

When the current in a circuit is being uninterrupted allowing the current to flow through the whole circuit

When something has interrupted the flow of electricity in the circuit

What is an arduino?

The range of wavelengths or frequencies

Is this true about how alkaline batteries work? It converts chemical energy into electrical energy by using manganese dioxide as the positive electrode and zinc cylinder as the negative electrode to power an external circuit

Is this true about what a fuel cell is? Work like batteries but they do not run down or need recharging. They produce electricity and heat as long as fuel is supplied. A fuel cell consists of two electrodes—a negative electrode (or anode) and a positive electrode (or cathode)—sandwiched around an electrolyte

A Thermoelectric cooling system that produces a heating and cooling effect when a dc power source is applied

Essentially flipped inside out, eliminating the need for brushes to flip the electromagnetic field

A simple circuit that lets you control a DC motor to go backward or forward

A device that is used to control a heater or other equipment by comparing a sensor signal with a set point and performing calculations according to the deviation between those values

Is this true about what a lithium battery is? An advanced battery technology that uses lithium ions as a key component of its electrochemistry. During a discharge cycle, lithium atoms in the anode are ionized and separated from their electrons

A basic circuit for when you need to test out an LED to make sure it works

The photoresistor comes into contact with darkness, and the resistance of the photoresistor goes high, causing the transistor base voltage to go high, allowing current to flow through the LED, which allows the LED to light up. The photoresistor in this circuit could also work the other way around, if the photoresistor comes into contact with light the resistance of the photoresistor goes low which then makes the base of the transistor go low but it still allows current to flow through the LED, it is enough current that the LED will light up

The circuit has 2 of each component which are resistors, capacitors, and transistors, and those components switch each other on and off making the LEDs flash

The 555 timer times the speaker to make a beeping noise every so often but what happens when you put a light near the photoresistor? The closer the light gets to the photoresistor the faster the speaker makes a beeping noise

The 555 timer in the circuit creates a delay in the circuit that causes the LED to start fading. This is why the circuit is called breathing LED because when it's fading it looks as if the LED was breathing

When you plug in the battery the LED is turned on but once you put your finger on the metal on the circuit the LED turns off which then sends a signal to the 555 on how long the LED should be turned on and how long it should be turned off. The 555 timer will then automatically turn it on and off

When the Peltier is connected to the temperature controller with a battery the temperature controller starts to give you the temperature of either the hot side or cold side of the Peltier

Once the TDS meter is connected to the Arduino and the Arduino is programmed, the TDS meter is put into water and the TDS meter will indicate the cleanliness of the water

When the water sensor is connected to the Arduino and a breadboard with 3 LEDs (Green, Yellow, and Red) and the Arduino is completely programmed, the water sensor goes into soil or water where a plant is and the water sensor will detect if there is enough water for the plant or if there is not enough water for the plant