Everything Flashcards
5 advantages of a microcontroller are…
- upload programs onto it
- it is small so it allows devices that use it to be smaller
- it can do more than one thing
- it is updatable
- it lasts longer than alternatives as the software is updatable
a unidirectional flow restrictor and a resevoir together creat a pneumatic…
time delay
To calculate force in a single acting cylinder use the formula…
force = pressure x area
In engineering area is always measured in…
and pressure measured in…
mm2
N/mm2
To find the force of the instroke of a double acting cylinder use the same formula, force = pressure x area, but to calculate the surface area of the instroke side of the piston use…
effective area = piston area - piston rod area
Open loop
everything is manual
eg. a tap - you have to turn it on and off
Closed loop automatic
set it to do something and it will constantly adjust to carry it out
eg. fridge - set the temperature and it keeps it the same
Closed loop manual
it will carry out an operation but you have to adjust it to your prefered settings
eg. shower - turn it out and adjust temperature to your preference, then turn it off when finished
What are the 2 main types of gearing mechanism?
A simple gear train
+
A compound gear train
Formula for kinetic energy…
Ek = 1/2 mv2
Formula for potential energy…
Ep = mgh
Formula for electrical energy…
Ee = ItV
Formula for heat energy…
Eh = mcΔT
(c = specific heat capacity)
V1 / V2 =
R1 / R2
Vout =
R1 / Rtotal x Vsupply
