Labview Lecture November 17

Difference between digital inputs is that the circuit is involved with a switch. In this way there is an all or nothing indicator that tells the device if it is reading or not. Analogue usually has a variable acting as a resistor input that changes the voltage that is read to display what is being recorded. with a 3.3V system it still works with the 5V system because the digital 1 is 2.6 and above and the digital 0 is 2.5 and below, effectively creating a binary system. Resistors are used to preserve the technology in the micro controller and the LED.

Voltage drop in LEDs are associated with their color. Current determines the brightness though a current that is too strong burn out the lights.  With the help of transistors or relays, digital outputs also control other more advanced electrical devices.

Review of binary:
numbers represent base 2 and the final answer is equal to the addition of each.
ex) 100 = 2^2*1+2^1*0+2^0*0=4
With 4 digital outputs you can have 16 options for what can be output.

BTD-British Telecom Digital (Left hand side plug)

POS.	DEFAULT
		COLOR	NOTE
Pin1	DIO0	YELLOW	3.3V or 5V High
Pin2	DIO1	BLACK
Pin3	DIO2	GREEN
Pin4	PWR (5.3V)	WHITE or BROWN
Pin5	GND	ORANGE
Pin6	DIO3	RED

A relay is nothing more than a switch. A relay is an electromechanical switch. Simply put, a relay will be used for an alarm or remote start installation for one or more of the four purposes:
o To turn something ON
o To turn something OFF or disable something o To change the polarity of a wire
o To increase the current supply of a wire.