Unit 1.2

Homework
PowerPoints
Skills learnedStudents will:
1. Differentiate among the various types of engineers and engineering technicians. 2. Measure forces and distances related to mechanisms. 3. Distinguish among the six simple machines, their attributes, and components. 4. Calculate mechanical advantage and drive ratios of mechanisms. 5. Design, create, and test systems using simple machines and drive mechanisms. 6. Calculate work and power in mechanical systems. 7. Determine efficiency in a mechanical system. 8. Design, create, test, and evaluate a compound machine design. 9. Communicate a design for a machine using annotated sketches and other documentation. 10. Collaborate effectively with others in a design team. 
Key TermsAmplitude
The instantaneous voltage of a waveform. Often used to mean maximum amplitude, or peak voltage, or a pulse. Boolean Expression An algebraic expression made up of Boolean variables and operators, such as AND (), OR (+), or NOT (). Also referred to as Boolean function or a logic function. Clocked D FlipFlop Type of flipflop in which the D (data) input is the synchronous input. Digital Waveform A series of logic 1s and 0s plotted as a function of time. Dual InLine Package (DIP) One style of integrated circuit package which has two rows of lead. Duty Cycle (DC) Fraction of the total period that a digital waveform is in the HIGH state. DC = th/T (often expressed as a percentage: %DC = th/Tx100%). Falling Edge The part of a pulse where the logic level is in transition from a HIGH to a LOW. FlipFlop A sequential circuit based on a latch whose output changes when its CLOCK input receives a pulse. Frequency The number of cycles per unit time of a periodic waveform. Hertz (Hz) Unit of frequency. One hertz equals one cycle per second. Integrated Circuit (IC) An electronic circuit having many components, such as transistors, diodes, resistors, and capacitors, in a single package Inverter Also called a NOT gate or an inverting buffer. A logic gate that changes its input logic level to the opposite state. Logic Diagram A diagram, similar to a schematic, showing the connection of logic gates. Oscilloscope A piece of test equipment used to view and measure a variety of different waveforms. Period The amount of time required for one complete cycle of a periodic event or waveform. Propagation Delays (tPLH/tPHL) Delay from the time a signal is applied to the time when the output makes its change. Schematic Entry A technique of entering CPLD design information by using a CAD (computer aided design) tool to draw a logic circuit as a schematic. The schematic can then be interpreted by design software to generate programming information for the CPLD. Sine Wave One in which amplitude varies in proportion to the sine function of an angle. Square Wave An almost instantaneous rise and decay of voltage or current in a periodic pattern with time and with a constant peak value. 555 Timer TTLcompatible IC that can be wired to operate in several different modes, such as a oneshot and an astable multivibrator. 