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4 years ago
  1. \documentclass[11pt]{article}
  2. %Gummi|065|=)
  3. \usepackage{graphicx}
  4. \usepackage{caption}
  5. \usepackage{xcolor}
  6. \usepackage[vcentering,dvips]{geometry}
  7. \geometry{papersize={6in,9in},total={4.5in,6.8in}}
  8. %\title{\textbf{Door Alarm}}
  9. \author{Steak Electronics}
  10. \date{}
  11. \begin{document}
  12. %\maketitle
  13. %\tableofcontents
  14. \textcolor{green!60!blue!70}{
  15. \section{Attiny Solar Energy Harvest Tests}}
  16. I have the following:
  17. \begin{itemize}
  18. \item Solar panels
  19. \item Attiny 10
  20. \end{itemize}
  21. To this list, I will add a supercap, and an energy harvesting IC. The goal being to load the super cap during the day, and to run 24/7. I will need an exceptionally low power micro. The super cap will need to be about 3.3V or 5V.
  22. \textcolor{green!60!blue!70}{
  23. \subsection{Micro Considerations}}
  24. The Arduino Atmega328P is not an option. I'm looking to have a current draw of only 1mA max, (ideally 500uA) when active. Moteino is also not an option for this. Those are made for batteries. I want to be battery free. A super cap, however can be used to store energy. I'll get to that shortly.
  25. For micros, I have some Attiny10 on hand, and these have a reasonably low power pull in active mode. Let's build those up first. What will the micro do? No idea. I haven't a clue.
  26. \textcolor{green!60!blue!70}{
  27. \subsubsection{Micro Notes}}
  28. Must run at 1.8V / 1MHz per front page of data sheet, for 200uA draw in active mode.
  29. \\
  30. \\
  31. \textcolor{green!60!blue!70}{
  32. \subsection{Energy Storage}}
  33. I don't want a battery. Let's go with a super cap. The solar panels will only be active some of the time, so I will want to harvest energy with some kind of IC into the cap when the sun is out.\footnote{Reference: www.analog.com/media/en/technical-documentation/technical-articles/solarenergyharvesting.pdf is a start. I'll need to do more research.}
  34. \textcolor{green!60!blue!70}{
  35. \subsection{Make parts, not scrap}}
  36. I will want to make sure that all parts I build are perf board parts, not breadboard scrap (to be torn down and rebuilt again). This is an Attiny, so no need to test much, yet.
  37. \end{document}