Digital Electronics Microcontrollers and Robotics 1 Digital Electronics

Digital Electronics, Microcontrollers, and Robotics 1 Digital Electronics, Microcontrollers, Robotics

Outline • Who – Dave Wittry & Don Allen (Troy), Ken Gracey (Parallax) • Why – show you enough fun things that you might want to start/add to a class • Game plan – ICT, Microcontroller Course, Parallax • www. troyhigh. com/wittry – all info today can be found here • docs, this presentation, more… (for tests/quizzes, contact us) 2 Digital Electronics, Microcontrollers, Robotics

ICT • History of the development of the class. • from general electronics to digital/computer electronics • the infusion of ACSL-like topics 3 Digital Electronics, Microcontrollers, Robotics

A bit - about - the bits … that make up the class 4 Digital Electronics, Microcontrollers, Robotics

Numbering Systems (1. 5 weeks) • conversions: Baseany. Other • addition/subtraction 5 Digital Electronics, Microcontrollers, Robotics

Logic gates (3 weeks) • AND, OR, NOT, NAND, NOR, XNOR • wiring the labs – breadboards, chips, led’s (little exploding devices) • lab sheets/assignments • the lab itself 6 Digital Electronics, Microcontrollers, Robotics

Karnaugh (K-Maps), NAND Implementations, Minterms (2 weeks) • method of simplifying boolean algebra expressions 7 Digital Electronics, Microcontrollers, Robotics

Boolean Algebra (2 weeks) • basic laws plus some specific only to boolean values • De. Morgan’s Laws 8 Digital Electronics, Microcontrollers, Robotics

Door–Goat–Wolf, Air. Lock, Football Projects • ties all topics to this point together • requirements Project 9 Digital Electronics, Microcontrollers, Robotics

Flip-Flops (2 weeks) • RS, RS-clocked, D, J-K • basic building block of shift-registers, counters, memory devices • students find it cool that the same switch combination can result in a different output (output based on last outcome) 10 Digital Electronics, Microcontrollers, Robotics

Counters (3 weeks) • up, down, mod-N counters, using a 555 timer 11 Digital Electronics, Microcontrollers, Robotics

Shift Registers (2 weeks) • left, right, re-circulating • multiplying/dividing by 2 • bit string flicking (ACSL) 12 Digital Electronics, Microcontrollers, Robotics

Adders/Subtractors (3 weeks) • ½ adders, full adders, ½ subtractor, full subtractors • 1’s and 2’s Complement, integer math • binary multiplication 13 Digital Electronics, Microcontrollers, Robotics

Equipment costs • Per group (2 students) – – breadboard, power supply ($75) 20 chips ($15) wires, template 6 LED’s ($1) • Class set – logic probe ($10), multi-meter ($15) – pliers, cutters, stripers, solder-iron, misc. ($50) 14 Digital Electronics, Microcontrollers, Robotics

Programming Microcontrollers & Robotics • History and Motivation for the class – melding of hardware & software – freedom to experiment and have fun with practical labs before it gets serious in college – BS 2 sounded like fun and the means to my end – took 2 -day educator course from Parallax • great if you’re a newbie to controllers – the curriculum is fun (WAM, BAD, IC, Robotics) 15 Digital Electronics, Microcontrollers, Robotics

Programming Microcontrollers & Robotics (cont’d) • much harder to get physical, real-world projects to do exactly what you want (neat!) as opposed to a software (theoretical) class – they’ll need time to experiment and try algorithms • cool thing I learned right away: watch out how much you tell them – they’re smarter/more creative than you! Let them suggest lab ideas and then try some. 16 Digital Electronics, Microcontrollers, Robotics

Teaching Style & Prerequisites • if you plan on teaching this type of course using a facilitative approach, keep prerequisites high – 20 students or so – otherwise you’re in for a nightmare with such an independent, self-motivated type curriculum and somewhat expensive hardware – great for middle-schools students as well – this class is LOTS of fun to teach 17 Digital Electronics, Microcontrollers, Robotics

The BS 2 and How it Works Code Wiring 18 Digital Electronics, Microcontrollers, Robotics

Interfacing to the real-world through a variety of devices • limited only by your imagination • Types of devices you can interface to the Basic. Stamp – almost anything! • simple electronics stuff – plus the more advanced/fun things (sound module, RF receiver/transmitter, video, web server…more from Ken) 19 Digital Electronics, Microcontrollers, Robotics

Electronics Component Companies • • • http: //www. stampsinclass. com (Parallax) http: //www. elexp. com/ (Electronix Express) http: //www. jameco. com/ (Jameco) http: //www. kelvin. com/ (Kelvin) … more; easy to find on web 20 Digital Electronics, Microcontrollers, Robotics

Robotics Labs • great curriculum, well-written, nice springboard to bigger better things, great for Back-To-School night • usage of servos, usage of devices already ‘played’ with (potentiometer for direction control, button for go/stop, etc. ) (Francisco) 21 Digital Electronics, Microcontrollers, Robotics

Robotics Labs (cont’d) • line following (photo-resistors, “TROY” signfollowing • Maze labs (spend as much time as you want here – it’s where they have the most fun) – maze construction/development – floor, walls, costs – one-hallway maze • find way in, ‘report’ at end, find way out • using “whiskers” • using infrared devices 22 Digital Electronics, Microcontrollers, Robotics

Robotics Labs (cont’d) • algorithms learned/discovered (careful how much you tell them) • follow-wall-right (quick bit on “Karel”) – spin off idea (stay straight and follow wall) • will be neat to try with Fuzzy Logic concepts • bump-and-turn 23 Digital Electronics, Microcontrollers, Robotics

Student-Designed Project • provided you have a budget, let students go through web sites, magazines/catalogs (Parallax, Nuts-And-Volts, Robot Magazine, Mouser, etc. ), books and design a project. Limit them as to how much they can spend. Have them “prove” they can make it work - then buy materials and have them go at it 24 Digital Electronics, Microcontrollers, Robotics

Fuzzy Logic (optional topic) • read a book in an engineering class? boy am I mean! • Bart Kosko’s “Fuzzy Thinking” is a nice, friendly place to start • current technology used in control systems to give smoother, simpler control of complex systems • eventually implement a fuzzy-controlled system with Parallax’s new Java-enabled microcontroller 25 Digital Electronics, Microcontrollers, Robotics