lesson 11 Flashcards
(28 cards)
what does the automated hand sanitizer consist of
a handset that will detect the hand and spray a liquid with the use of a pump,
relay,
buck converter,
IR sensor
a controller
a mini pump has 2 components …what are they
DC motor and the casing for the liquid
what is a DC motor
a device that converts electrical energy into mechanical rotational energy
how does a DC motor work
by using electrical energy to generate electromagnetic fields (EMF)
Magnets inside the motor create an electromagnetic field to push against. This causes rotation about an axis
look at lesson 11 page 2 to identify the parts of a mini pump
np
the DC motor will be used to …
pump the sanitiser from the storage container to the dispenser
what does a motor have
impeller attached to its axel
what is contained in the case
motor and impeller
how does the sanitizer move into the tubing system
the motor rotates the axle, the impeller turns and forces the sanitiser to move into the tubing system
RPM stands for
revolutions per minute
what is the speed of the motor rotation measured in
units called RPM (revolutions per minute).
what powers a DC motor
a Battery
what is RPM
the number of times a gear will complete a full rotation in one minute.
what is important for controlling the rotation speed of the motor
voltage
the monitor functions as a …
load, since the load represents anything that draws power.
the arduino is the … and what is it used for
The Arduino is the brain of the entire system
is used to check and control the operation of the circuit
how can arduinos be damaged
and what are they sensitive to
Arduinos are very sensitive to the flow of current
could be damaged if too high a load is connected directly to the Arduino
The Arduino is considered to be a …system and what is the solution the the problem
low powered
The solution to this problem is to use a Relay
what are relays used to do
adapt the current strength for the Arduino to handle
What is a relay?
a type of switch that is used to control a circuit without the need for humanintervention.
what do relays do
Relays control the circuit with the help of a signal to switch something on or off.
mainly used to control a high-powered circuit using a low-power signal.
Relays can allow the flow of high current levels while also protecting components, like the Arduino. They act as a gateway through which the Arduino can operate.
look at page 4 to look at the parts of a relay
np
a relay consists of
a high voltage system and a low voltage system
…connect the high-voltage systems, like a motor or a battery, to the circuit
The screw terminals
