updd

60hz_Divider/docs/4.tex

@@ -0,0 +1,63 @@
+
+\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{}}
+\author{Steak Electronics}
+\date{}
+\begin{document}
+
+\maketitle
+
+%\tableofcontents
+\textcolor{green!60!blue!70}{
+  \section{60Hz Divider}}
+
+
+
+\subsection{Counting the Hz}
+pseudo code goal:
+\begin{verbatim}
+Using 1Hz signal
+Start counting 1MHz every 1Hz
+when next cycle is received,
+   display count
+   start counting again
+\end{verbatim}
+That's all the objective is here. Easy with a micro, but goal is to complete using cmos or 74 logic.
+
+ 4553 x 5 
+ 74hct132
+ 1MHz clock (or 6MHz clock), or some variation thereof
+ jk flip flop
+ 74376  - quad jk flip flop
+ 7476 - jk flip flop
+1mhz clk will be main counter,
+6 hz or 1 hz will be latch / reset
+
+\subsection{MAX7219 8 digit 7 LED segment Display Driver}
+Basic code tested with this was the LedControl arduino library.
+
+/begin{verbatim}
+/*
+ Now we need a LedControl to work with.
+ ***** These pin numbers will probably not work with your hardware *****
+ pin 12 is connected to the DataIn 
+ pin 11 is connected to the CLK 
+ pin 10 is connected to LOAD 
+ We have only a single MAX72XX.
+ */
+\end{verbatim}
+Some of the lines have to be edited to allow for all digits to be read, and
+also to lower intensity of display. I think also a component package (dark 
+grey clear plastic bag) in front of the leds with intensity 1 is about right.
+
+
+
+
+\end{document}
+