input
sensors which monitor and measure a range of physical quantities
process
microcontrollers process and enhance function
output
produce a physical response from the system
LDR
increases resistance so doesn’t produce light
thermistor
increases resistance when cold
switch
any device used to interrupt the flow of electrons
microprocessor
at the centre of a computer
microcontroller
at the centre of an embedded system
disadvantage of programmable microcontroller
custom programs can be expensive
how to calculate mechanical advantage
load/effort
how to calculate velocity ratio
distance moved by effort/distance moved by load