ECE 2900 The next couple of weeks Project 5: now Project 6: 2 weeks Faculty Biographies

Project 6 An Introduction to Transmitters and PC Control

Project 6 Build a simple crystal controlled transmitter and control this transmitter with MATLAB

What exactly is current? Flow of electrons Current is defined as the direction as positive charge flow. Current is also the amount of positive charge flowing by a region per second (dQ/dt).

V = R I I E = (1 + β DC )I B I C = β DC I B

What are the components that we will be using? What resistor value is BROWN – BLACK - ORANGE

How do I connect the Transistors?

What does this circuit look like?

How do I control this transmitter?

What kind of MATLAB code can I use? comport=serial('COM1','BaudRate',9600); set(comport,'RequestToSend','off'); get(comport) comport.PinStatus fopen(comport) % send the RTS state, off (+5v) or on (-5v), to the comport set(comport,'RequestToSend',y);

Various Tasks to Complete in Project 6 Calculate resistor values, currents and transistor parameters Build the transmitter circuit and verify its operation Insert the control transistor (2N7000) Write MATLAB code to generate a coded identification signal from the transmitter Verify the coded operation of the transmitter