ER Flex Circuit. For your final ER entry you will continue the tradition of adding a live circuit page to your ACES' archive. First introduced last year, the 2015-2016 ACES produced a solar-powered laminated page of their own design, based on an SOIC-8 ATtiny85. Check out their results. Your final circuit will be submitted to Mr. D., in class, Period 1, on Tuesday May 2 (No APs that morning). This leaves the rest of May to focus on your Long ISP, as your last responsibility to the ACES program, except to show up for Graduation and receive your hard hat and bound ER. Here is your list of proposed Flex Circuits.
ER Flex Page Part 1. THT Prototype. Your final flex circuit will see an SMT ATtiny85 soldered to a 9081 Surfboard® as depicted above and below, right. To this end you are to design and implement an interesting through-hole prototype using parts from your inventory. Your kit contains resistors, LEDs and an ATtiny85 in an DIP-8 package.
You can flash your '85 with your Sparkfun Pocket Programmer.
The circuit must run on no more than 3.6V and draw no more than 100 mA.
Submit your ER to handin no later than Saturday April 15 under the Subject Line: ER Flex Page: THT Prototype
For Part 2 of this project, you will be supplied with the SOIC-8 SMT version of the ATtiny85. Together with LEDs, resistors and buttons in the 1206 package, similar to the ones you used in your previous SMT1 DC Power Jack project, you will complete your Flex Page.
ER Flex Page Part 2. SMT Final. OK, this is going to take some skill and creativity. Please do not procrastinate and jeopardize an otherwise impressive ER archive.
You're going after something unique; a solar-powered live curcuit embedded in a page within your Engineering Report. in the furuee, when you show your ER the light od day you'll marvel at what you accomplished in high school. A photo of Ryan Power's effort last year looks much like th formatting of all the other pages in his ER except the cutaway is an intersection circuit that goes live when placed in sunlight due the to MPT3.6-150 solar panel laminated into the page. His ER Report continues on the backside of the page.
Task.
- Replace your THT '85 with your SOIC Test Socket in your breadboard, rewire in the ISP lines, flash your code and confirm the curcuit remains funtional.
- Using your THT protoype as a guide, solder the SMT components to your 9081 Sufboard and test.
- Plan the content and layout of your final, two-sided ER page to include the solar cell and Surfboard.
- Confirm your working Surfboard to Mr. D. before 4:00 pm on Wednesday April 26.
- Email your ER to handin by midnight Saturday April 29 under the Subject Line: ER Flex Page
- Once I run off your two-sided page in colour I will return them to you for further assembly. We'll laminate them on Day 1s in May and I'll keep them until June, when I have your ERs printed and bound.
DC Power Jack. Your experience with electric circuits has been largely limited to components that use through-hole technology (THT). To round out your proficiency with all components, your next few projects will require the use of devices that use surface-mount technology (SMT). As the graphic reveals, the smallest size that is reasonable for hand-soldering techniques is the 1206 family, so this is what we carry in the DES inventory.
Task.
- P. Bagga (ACES '17) redesigned his original RSGC ACES DC Power Jack to include an optional power LED and resistor. You will be given a small parts kits that includes the PCB, a THT DC Power Jack, and a 2x3 male header pin. You can choose your 1206 SMT LED colour from our inventory of red, green, blue, or amber and your 1206 resistor from our inventory of 330Ω, 1kΩ,or 10kΩ.
- Using a digital soldering station for the THT components and either of the
AOYUE 968 Hot Air Rework Stations for the SMT parts, you are asked to assemble your DC Power Jack.
- Submit your device to Mr. D before the indicated deadline.
Blink. Your experience with AVR microcontrollers has been largely limited to the Arduino and its onboard ATmega328P. For many of your projects to this point the mega has been overkill in that it offers far more I/O pins than you've needed. This task introduces you to a smaller AVR microcontroller, the ATtiny85, and gives you a chance to confirm that your AVR assembly skills are equally applicable to other family members. For many of you, this is also the first time you've left the comfort of the Arduino and programmed a microcontroller on a breadboard. The real benefit of this task is the familiarity you gain with a more compact microprocessor logic foundation for future ISPs.
Task.
Two of the new components you'll require for this task can be found in your toolkit (ATtiny85, Sparkfun's AVR Pocket Programmer)- To make uploading your code to standalone AVRs easier you will be provided with an ACES' ISP Breakout Board.
- Using your assembly programming and research skills, develop and upload assembly code that results in an LED blinking on pin 2 of the ATtiny85.
