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* electronics
digital devices - deal with 1s and 0s
analog - deal with continious devices, often these circuits can do things like following a line without using a microprocessor
voltage regulator regulates voltage
amplifiers - amplify
op amp - operational amplifiers
ceramic capacitors, electrolytic capacitors (cylinderical)
bjt - bipolar junction transistor
the TI msp430g2 launchpad is based on a MSP430G2553 microcontroller, programmable in C
hello world program - the blinking led
connect battery, resistor and a led, it shall light
you can use the voltage regulator (LM 1086) in order to convert the 9V input to a 3.3V output
it has IN, OUT and GND. that's it
they need capacitors as well. why?
potentiometer - variable resistance based on how much you turn the knob
ideal ammeters are suppose to have zero voltage difference across them
this means that resistors have voltage difference across them which is equal to i*R across them
the wheatstone that can be used to measure unknown resistances
amplifiers
open-loop amplifier known as the comparator
Comparators are active devices, meaning that they must be powered to function.
ground is a reference point, we pick a node in a circuit as a reference point and all other voltages are given wrt to the ground.
it is much like we choose ground as the zero potential energy and potential energy of everything else wrt to it
by definition voltage is not an absolute quantity but rather the difference in electric potential between two locations
it is sometimes convenient to select a reference point in the circuit, label it ground, and then speak of the voltage at any point in the circuit with respect to that ground point
comparator - drawn as triangles
V+ and V- at back, 1 output at opp vertex Vout
Vout = f(V+, V-)
the function can be anything, linear non linear etc
in linear, f() is just a constant (open loop gain)
we use a diamond shape (rhombus) to show for a non constant voltage source
now as the amplifier amplifies, it needs a power source to function
the amplifier can have limits, and if the amplified output is higher than the limits, the output is capped to the limit