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EE 2303 Intro to ECE Voltage and Current Measurements 1 Introduction Glen Archer – Lab Coordinator 487-2789 (Office) Leave msg with secretary 482-4957 (Home) Between 1000 - 2100 [email protected] www.ee.mtu.edu/labs 2 Teaching Assistants Anand Ambardar David Pelster 3 Agenda Lab Safety (repeat) Voltage Current Electric Circuits Resistors Color code 4 Breadboards Circuit construction techniques Power Supply: 8102 Lodestar DC Power Supply Virtual Instruments: Multimeter NI 4060 5 Vocabulary Electric Circuit Voltage Current Parallel Series 6 Voltage Potential Difference between two points Always has polarity (+/-) Measure voltage in parallel 7 Current: Amperes (A) The flow of electrical charge through a conductor or circuit element Current flow requires a continuous path Measure current in SERIES Direction is important 8 Electric circuits Current flow requires a continuous path Voltage can appear across an open circuit 9 Series Circuits Current in Series circuits is the same 10 Parallel Circuits Voltage in parallel circuits is the same Va = Vb = Vc 11 4-stripe resistor Resistors Carbon Wire wound Precision Power Rating A B C D 5-stripe resistor A B C D E 12 4-stripe resistor A B C D Color Digit (A) (B) Multiplier C Tolerance (D) Black Brown Red Orange Yellow Green Blue Violet Grey White Gold Silver None 0 1 2 3 4 5 6 7 8 9 1 10 100 1000 10K 100K 1M 10 M 0.1 0.01 1% 2% 3% 4% Flame Proof 5% 10% 20% Bad Boy R O Y Great Britain Very Good Wife Go See Now 13 Breadboards Power and Ground Components Rows and Columns 14 Lodestar 8102 Power Supply Dual 30 V 3 A Independent Series Parallel Dual ended (+/-) 15 Lodestar 8102 Controls ON/OFF Mode Selector Volt – Fine and Coarse Current limiter Output Terminals Meters 16 Lodestar 8102 Operation Series Parallel Independent Dual Ended GROUND 17 Multimeter Control Panel Volts AC & DC Current AC & DC Resistance 18 Summary Lab Safety (repeat) Voltage Current Electric Circuits Resistors Color code Breadboards Circuit construction techniques Power Supply: 8102 Lodestar DC Power Supply Virtual Instruments: Multimeter NI 4060 19 Where to Get More Information www.astro.wisc.edu/~mukluk/resistor.html www.ee.mtu/labs/EE2303/references 20