Checkpoint LAB USB-RS232 Bedienungsanleitung

PRACTICAL DESIGN CONSIDERATIONS Prof. George SlackLecturer, Electrical and Microelectronic EngineeringBlding 9, Office 09-3189(585) 475-5105Rochester

H BRIDGEHow H Bridges workThe switches are turned on in pairs, eitherhigh left and lower right, or lower left andhigh right, but never both switches o

H BRIDGEBUY OR BUILD H BRIDGE?• Your project’s Needs!• Cost?• Reliability?• Features?• If you buy an H Bridge, there are 100’s to pick from! For your

STEP 5. NOISE IMMUNITYKnow the project’s planned environmentCircuit noise immunity is the ability of a device or component to operate in the presence

NOISE IMMUNITY optoisolator, optocoupler – input signalThe LED input circuit is isolated from the photo transistor, as shown.Slower transient pulses (

NOISE IMMUNITY optoisolator, optocoupler – on-line signal & drive Analog and Digital Optocoupler /OptoisolatorsAnalog Devices:• http://www.analog.

NOISE IMMUNITY OVER-VOLTAGE PROTECTIONFuse1N5339 (5.6V for a 5.0V input)+input port–(+)(–)Zener diode(also MOV)Helps against transients and over volta

NOISE IMMUNITY A SOLUTION: LOWPASS FILTERRemove high frequency noise. Simple RC low pass filter (left) or active circuit (right) for improved isolati

NOISE IMMUNITY DECOUPLING CAPACITORS• Know your performance response needs. • Try to eliminate frequencies outside your performance needs (i.e. filte

STEP 6 HARNESSESHARNESS -TWISTED PAIRWhen purchasing harness cable:• Unshielded Twisted Pair (UTP)• Shielded Twisted Pair (STP) • Purchase or make you

PRACTICAL CONSIDERATIONS1. Current, Voltage Needs• Gauge of wire, insulation2. Customer’s Use and Abuse • Connect/ disconnect needs • Routing, protect

Typical Example list: Microcontroller, Software, OS needs. Data sample rate? Frequency response? Integrate / discrete components / hybridWarning:

• Start your schematic(s), if not already. • Sketch a drawing or visualization your project including the following:• Define I/O Design Needs• Speci

APPENDIXMore resources and notes41Step 1. Schematic Bullet List Planbest practices, fine print… Some example areas: Develop Engineering Specification

Step 2. Input Output DevicesWhere to start?1. Google search2. Wallace RIT Library http://library.rit.edu/3. RIT IEEE http://ieeexplore.ieee.org/Xplor

Step 2. Input Output Device Advice1. Impedance matching to your control electronicsOutputs• GPIO Logic (VOHand IOH) converted to either a lower or hig

STEP 5. NOISE IMMUNITY CONTINUEDHOW DOES NOISE GET INTO ELECTRONICS? Energy Coupling(Conductive, Inductive, Capacitive)• EMI - Current surges(ElectroM

Step 2. Input Output Device Adviceb. Spec Sheets & App NotesThe Devil is in the Details”Save Hours of design time! Exploit manufacture’s Design No

TEMPERATURE PROBES, THERMOCOUPLES, THERMISTORThermo monitoring:• One and 70 microvolts per degree Celsius (µV/°C) for standard metal combinations, air

HALL EFFECT SENSORRotation Movement• Uses internal magnetic fields. • External rotation blocks and unblocks a metallic slotted plate which changes th

(Continued) ANGULAR PLACEMENT: ENCODERS,Color FunctionBlack motor powerRed motor powerBlueHall sensor Vcc (3.5 –20 V)Green Hall sensor GNDYellow Hall

RFID –RADIO FREQUENCY IDENTIFICATIONWireless Short Range LocatorHow it works: RF unit transmits to listening devices (RFIDs) within its range. Once w

LEVEL SHIFTER• Needed for multiple voltage devices. That is, when mixing CMOS, TTL and other IC devices, the threshold voltage levels will be differe

IMUs AND ACCELEROMETERSInertial Measurement UnitMeasure acceleration and gyroscope• serve as orientation sensors in the human field of motion.• At the