The mystem Project Board Quick Start

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Merilyn McDaniel
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This exercise will allow you to become quickly familiar with configuring Labview to process the information and create desired outputs.

1 The mystem Project Board Quick Start This activity will introduce you to the basic functions of the mystem Project Board to get you started. Introduction to the mystem The mystem Project Board is designed to allow you to incorporate all manner of sensors with easily configurable outputs. This exercise will allow you to become quickly familiar with configuring Labview to process the information and create desired outputs. The mystem board plugs into the side of the mydaq or the myrio, turning them into compact affordable programmable action controllers. Using the Breadboard The included onboard 400 pin breadboard on the face of the mystem is utilized to build and configure temporary circuits. A frequent use is for sensor connections. The picture below shows the surface of the breadboard. Some of the pins are connected under the board by metal strips to make connections between components easy. These strips connect the holes on the top to form nodes. Below you can see a matrix of holes. ABCDE and FGHIJ describe the five holes that line up in each column. The columns are numbered. Circled are the two nodes found on Column 4. ABCDE in Column 4 are connected to each other vertically. FGHIJ in Column 4 are also connected to each other vertically, but separately from ABCDE. The plastic groove running down the center of the board separates the two nodes and prevents electrical conduction. On this board there are 60 nodes. Each node is separate from all the other nodes.

2 At the outside of the board are two power rows. While the electrons do not care what the color of each row is general convention calls for the red rows to be used for the + or positive voltage on the board with the blue rows be used for the common ground row. If you learn to stay with color conventions others will understand your wiring scheme and it will help you eliminate errors. Connecting the mydaq Signals are passed to and from the mydaq through the five Quad Point Contact Blocks. These blocks behave similar to the breadboard. There are four interconnected holes that make up a node. The five blocks are from left to right: Voltage sources, Analog Output, Analog Input, and two blocks of Digital Input/Output. For a full discussion of these see the manual for the mydaq found at Connect the Power Source The mystem Project Board needs to be powered. You can supply any voltage between six and twenty six volts. There is an onboard regulator that produces the required 5 volts for the logic circuits. You should select a power supply that can supply the voltage and current your output devices need. The first method is to connect a wall transformer to supply the desired DC voltage. The connection is done through a standard 2.1 mm x 5.5 center positive plug. It is recommended that your power supply be a switching power supply that will protect the power supply in the event of over current or short circuit stituations. Nominally a 9V DC or 12V DC adapter with minimum 800ma to 1A output is desired if using the included DC Motor. Studica.com 2 mystem Quick Start

Typical 9V-12V DC wall transformer can be used.

bench DC power supply as shown below. The alternate power supply connections are labeled GND and SV+.

closest terminal to the switch, while the GND terminal is connected to the Ground (black) terminal of the power

3 Typical 9V-12V DC wall transformer can be used. For higher voltages (26 Volts DC Max) and currents (4 Amps max) you should use the Screw Terminals and a separate bench DC power supply as shown below. The alternate power supply connections are labeled GND and SV+. The SV+ (Supply Voltage) is connected to the Positive (red) terminal of the power supply connector which is the closest terminal to the switch, while the GND terminal is connected to the Ground (black) terminal of the power supply connector. AC adapters, and voltage transformers, are critical safety components. Correct sizing and polarity of the DC power supplies are critical to your safety. Studica.com 3 mystem Quick Start

electrical shock in certain cases. Studica will not be held responsible for damage to equipment, blown electronic parts, or personal injury that may result from the use of improper power supplies.

Connecting the Outputs The output screw blocks are labeled according to each channel. The blocks are labeled Output1 - Output4.

4 IMPORTANT! Damage may be caused by use of improperly rated or incompatible devices which can result in damage or destruction of the mystem Project Board, and/or powered equipment, as well as the risk of electrical shock in certain cases. Studica will not be held responsible for damage to equipment, blown electronic parts, or personal injury that may result from the use of improper power supplies. You should also be cautious when using higher currents as significant heating will occur in the controller output chips U1 and U2. Connecting the Outputs The output screw blocks are labeled according to each channel. The blocks are labeled Output1 - Output4. The polarity of the outputs can be reversed if so desired by grounding the direction signal input for the channel. This can be done by directly wiring the direction signal input to a ground or by the computer program which can be done through a digital I/O from the mydaq. This polarity can also be reversed directly on the outputs if so desired. At the end of the output blocks is a connection where the supply voltage (SV) and ground (GND) are available for testing output devices. Connecting the control Signals There is a 12 pin connector next to the 400 pin breadboard for making connections to the output channels. Output1 is controlled by the two pins En1 (Enable 1) and Dir1 (Direction 1). Output2 is controlled by the two pins En2 (Enable 2) and Dir2 (Direction2) and so on. Studica.com 4 mystem Quick Start

Output control signals on the mystem Project Board.

3 to 5V) to the enable pin of the channel.

When the board is powered and turned on this jumper wire will turn the current on to the Output 1.

Channel 1. If you desire the motor to change direction you need to provide a second signal.

5 Output control signals on the mystem Project Board. Printout of the Output Control Signals To power an output channel you need to provide a digital high level signal (3.3 to 5V) to the enable pin of the channel. In the picture below a motor connected to output 1 is turned on manually by providing a jumper wire from 5 V to En1. When the board is powered and turned on this jumper wire will turn the current on to the Output 1. The direction has a default setting so if you do not need to control direction you only need to provide the digital high signal to the Enable of Channel 1. If you desire the motor to change direction you need to provide a second signal. Since the motor is defaulted high level on the direction signal you need to provide a digital low level to the direction signal pin to have the output channel reverse direction. In the picture below the white jumper wire is added from the GND pin to the Dir1 pin. The motor should now spin the other way. Try hooking up a motor to Output 1 and running a jumper wire from 5V to En1. When the board is turned on the motor will spin. Add a jumper wire from GND to Dir1 and the motor will instantly switch directions. Studica.com 5 mystem Quick Start

Launch the NI ELVISmx Instrument Completed wire connections from the mydaq On your computer launch the NI ELVISmx Instrument Launcher.

6 Computer Control of the Outputs Connect your mystem Project Board to the mydaq and connect the USB cable to your computer. Now disconnect the input wires from 5V and GND and move them to the Digital Input and Output section (DIO). Use DIO 0 for En1 and DIO 1 for Dir1. See the connections in the pictures below. Launch the NI ELVISmx Instrument Completed wire connections from the mydaq On your computer launch the NI ELVISmx Instrument Launcher. It is found in the Start Menu>>All Programs>>National Instruments>>NI ELVISmx for NI ELVIS & NI mydaq>>ni ELVISmx Instrument Launcher. This brings up the instrument launcher. Using the Digital Writer VI to output the motor control signals From the menu select the DigOut icon. Studica.com 6 mystem Quick Start

7 This launches the Digital Writer. You can set the lines to Write to 0-3. Select run at the bottom of the window. When you push the switch to HI for DIO 0 you will see the motor turn on and an LED on the screen to let you know that DIO 0 is on. You can now change direction by taking the DIO 1 switch and move it to the HI setting. You will see the motor reverse direction. Be sure that the DIO 0 is returned to the LO position before stopping the VI with the stop button. If it is not turned off before you stop running the program the motor will keep running. If you accidently stop the program with the motor running you can select run button again and then stop the motor moving the switches to LO before stopping the Digital Writer. This completes the Quick Start Tutorial. For further information on the mystem Project Board and accessing the online curriculum on how to control the board with Labview programming, please visit; mydaq and myrio are Trademarks of National Instruments Corporation Studica.com 7 mystem Quick Start

GEORGIA INSTITUTE OF TECHNOLOGY School of Electrical and Computer Engineering ECE 2020 Fall 2017 Lab #1: Digital Logic Module

GEORGIA INSTITUTE OF TECHNOLOGY School of Electrical and Computer Engineering ECE 2020 Fall 2017 Lab #1: Digital Logic Module GOAL To introduce the physical implementation of digital logic circuits including