You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
2.9 KiB
54 lines
2.9 KiB
|
|
\documentclass[11pt]{article}
|
|
%Gummi|065|=)
|
|
\usepackage{graphicx}
|
|
\usepackage{caption}
|
|
\usepackage{xcolor}
|
|
\usepackage[vcentering,dvips]{geometry}
|
|
\geometry{papersize={6in,9in},total={4.5in,6.8in}}
|
|
%\title{\textbf{Door Alarm}}
|
|
\author{Steak Electronics}
|
|
\date{}
|
|
\begin{document}
|
|
|
|
%\maketitle
|
|
|
|
%\tableofcontents
|
|
\textcolor{green!60!blue!70}{
|
|
\section{Attiny Solar Energy Harvest Tests}}
|
|
|
|
I have the following:
|
|
\begin{itemize}
|
|
\item Solar panels
|
|
\item Attiny 10
|
|
\end{itemize}
|
|
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.
|
|
\textcolor{green!60!blue!70}{
|
|
\subsection{Micro Considerations}}
|
|
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.
|
|
|
|
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.
|
|
|
|
\textcolor{green!60!blue!70}{
|
|
\subsubsection{Micro Notes}}
|
|
Must run at 1.8V / 1MHz per front page of data sheet, for 200uA draw in active mode.
|
|
\\
|
|
\\
|
|
|
|
|
|
\textcolor{green!60!blue!70}{
|
|
\subsection{Energy Storage}}
|
|
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.}
|
|
|
|
\textcolor{green!60!blue!70}{
|
|
\subsection{Make parts, not scrap}}
|
|
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.
|
|
|
|
\textcolor{green!60!blue!70}{
|
|
\subsection{Programming}}
|
|
To program the Attiny10, I'll use the Arduino adapter from the Junk + Arduino blog. I built it up\footnote{Had slight error where the Arduino + board wouldn't read - pins too short on headers, then the arduino wouldn't boot - due to bad connection on perf board shield. Thankfully, the USB port didn't try to run. Protection circuitry cut in on the laptop.}, and was able to Read the memory. In order to upload to the board, you will need a compiler setup. You can possibly do it in AVRGCC, but instead I opted for either Arduino IDE (via Attiny10Core which didn't work), and then went to Mplab. In order for mplab 5.25 to work, it will need XC8 compiler, and there is a pack that can be downloaded through the IDE to get Attiny10 support.
|
|
|
|
It appears the AVR Dragon (which I have) can not be used. However, other programmers can be used. Pickit 4, Mkavrii, stk600, I think.
|
|
|
|
\end{document}
|
|
|