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ENGG1015 Tutorial

Pro-Project Laboratory and Project 15 Oct (Supplementary notes, may be obsolete,

NOT for examination) Learning Objectives

Identify components that can be used in the pre-project labs and project (i.e. Build a Rube Goldberg Machine)

Identify electrical safety rules, electrical units, electrical symbols rules

Electrical Safety

5-10 ma can cause death Skin resistance can range from 1kΩ for wet

skin to 500kΩ for dry skin. Death can result from as low as 50 volts Body can sense 9 volts under the right

conditions

Report TA or technician for any emergency case

Electrical Units

Voltage (V): volts (μv → kv) Current (I): amperes (amps), milliampere (ma

10-3) Resistance (R): ohms Ω, k-ohms (k 103), meg

ohms (m 106) Capacitance (C): farad, microfarad (µf 10-6),

nanofarad (nf 10-9), picofarad (pf 10-12) Inductance (H): henry, millihenry, microhenry Frequency (freq.): mhz, ghz 109

Electrical Symbols

AC sourcerelay

DC source

lamp

speaker

bellbuzzer

contact

battery

resistorground

Knowledge for the Pre-Project Lab From circuit diagram to implementation

Knowledge for the Pre-Project Lab From circuit diagram

to implementation

Knowledge for the Pre-Project Lab

Terminal Board

Sensor / Switch

Motor / Driver

Wire to power supply

Wire color scheme (red (DC), black (GND), yellow, blue, green)

SS relay

Digital Multi-meter (DMM)

Important debugging tool Voltage DC: 2mv-1000v Voltage AC: 2vac-750vac Current: 2ua-10A Resistance: 2-2m BJT: beta test Diode test