Circuit design for conductive inks- Part 8: Wrap-up
This is the final article of the series on conductive ink experiments. Let’s review the highlights of what we’ve learned, and summarize how we might use those lessons in a flexible circuit board design. Chris Lott I am the proprietor of Chris’s Corner, an electrical engineer with more years in the field than I want […]
Circuit design for conductive inks- Part 7: Transient analysis
Transient Analysis In this post we will examine some transient response tests as a function of trace resistance. And I’ve found the solution of the less-than-perfect serial port errors. This is part 7 of the series on conductive inks, and will wrap up the experiments portion of this series. The next and final post will […]
Circuit design for conductive inks- Part 6b: DC performance tests
In this post we will wrap up part 6 by looking at some DC performance tests (apologies in advance for the fact that these tests are not very photogenic). And I’ll also dig a little deeper in the mystery of the serial port errors from last time. Chris Lott I am the proprietor of Chris’s […]
Circuit design for conductive inks- Part 6a: Tarte-Py assembly and test
The Tarte-Py boards have arrived, they’ve been assembled, and they’ve tested. In fact, one of them is running a series of tests right now as I type this post. How did it go? In summary, it was one of the worse board bring-ups I’ve experienced in recent memory. The troubleshooting process was both frustrating and […]
Circuit design for conductive inks- Part 5c: MCU Test Board
Today we will go over the hardware design of the MCU board, which I’ve named Tarte-Py: Tester for Automatic Resistive Trace Experiments in Python. The board follows closely in concept to the Pyboard as noted in Part 4, but with some slight circuit changes and big mechanical changes to better fit our application. Chris Lott […]
Circuit design for conductive inks- Part 5b: Instrument setup
In this article, I’ll discuss the testing approach for this project. Since I’m basically lazy, the goal is to keep things as simple as possible and try not to reinvent the wheel. Chris Lott I am the proprietor of Chris’s Corner, an electrical engineer with more years in the field than I want to admit. […]
Circuit design for conductive inks- Part 5a: TraceR
In this article, I am going to review the variable trace resistance simulator that I’ve designed for this project. I’ll go over some design options and how I made my decision, and wrap up with the completed design, whose PCB is being produced even as I type. In case you’ve just missed the blogs leading […]
Circuit design for conductive inks- Part 4: Making a reference PCB
In the previous articles, we’ve taken a look at conductive ink PCB traces using a few back-of-the-envelope calculations. Now that we have a rough idea what to expect, it is time to get on with the fun part of this series — building a real printed circuit board and testing how it behaves as we […]
Circuit design for conductive inks- Part 3: Dynamic AC performance
Last article we looked into the ramifications of using conductive ink PCB traces from a static, DC perspective. Today I’m going to consider the implications from a dynamic point of view. Most of the signal interfaces we use in microcontroller designs today drive very high impedance loads. The impact of increasing the trace resistance connecting […]
Circuit design for conductive inks- Part 2: Static DC analysis
During this series, I plan to learn about printed ink conductors primarily on my own, through analysis and experiments. Therefore I have intentionally avoided digging too deep into the details of how they are commonly used in the industry (an approach I wouldn’t recommend for someone doing this for a professional product). But I do […]