From c96552d3a3e104b2555b43211a696d4ac9f0e7c2 Mon Sep 17 00:00:00 2001 From: thing1 Date: Thu, 13 Mar 2025 10:00:04 +0000 Subject: minor changes --- electronics/cw2/timetable.org | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'electronics/cw2/timetable.org') diff --git a/electronics/cw2/timetable.org b/electronics/cw2/timetable.org index 9230121..025e2f8 100644 --- a/electronics/cw2/timetable.org +++ b/electronics/cw2/timetable.org @@ -1,11 +1,14 @@ * system - have the finished system build by (14/3/25 friday) + have the finished system build by (14/3/25 friday) done on the (12/3/25) * system design try to finish the diagrams, descriptions etc by the (16/3/25 sunday) alternative designs and complete diagram done by (19/3/25 wednesday) * system testing - get testing done by (30/3/25 sunday) take lots of photos + get testing done by (30/3/25 sunday) take lots of photos. testing done on (12/3/25) however still need to write up all of it. + +* evaluation and final touches + finish by the start of easter (3/4/25?) -- cgit v1.2.3 From 2e7c7b0c97500a772c93fab40652d0d99d03a424 Mon Sep 17 00:00:00 2001 From: thing1 Date: Sun, 23 Mar 2025 18:47:33 +0000 Subject: alot of diagrams --- comp/lucas-standen-NEA/code2/appendsnprintf.o | Bin 0 -> 2480 bytes comp/lucas-standen-NEA/code2/comp.o | Bin 0 -> 15008 bytes comp/lucas-standen-NEA/code2/examples/tmp.zpy.c | 5 + comp/lucas-standen-NEA/code2/fileread.o | Bin 0 -> 1992 bytes .../lucas-standen-NEA/code2/stdlib/String/String.o | Bin 0 -> 6288 bytes comp/lucas-standen-NEA/code2/stdlib/zpylib.o | Bin 0 -> 3312 bytes comp/lucas-standen-NEA/code2/tokenizer.o | Bin 0 -> 2064 bytes comp/lucas-standen-NEA/code2/util.o | Bin 0 -> 1608 bytes comp/lucas-standen-NEA/code2/zpy | Bin 0 -> 24712 bytes comp/lucas-standen-NEA/code2/zpy.o | Bin 0 -> 5016 bytes comp/skeleton/skel.py | 2 + comp/work/49/examq | 7 + comp/work/49/sheet | 7 + electronics/cw2/diagrams/AM demodulation.png | Bin 0 -> 357342 bytes electronics/cw2/diagrams/AM-demod.gif | Bin 0 -> 3052649 bytes electronics/cw2/diagrams/AM-demod.png | Bin 0 -> 20190 bytes .../cw2/diagrams/audio intensitity meter.png | Bin 0 -> 403438 bytes electronics/cw2/diagrams/audio peak finder.png | Bin 0 -> 244768 bytes .../cw2/diagrams/diagrams-AM demodulation.svg | 3254 ++ .../diagrams/diagrams-audio intensitity meter.svg | 3404 ++ .../cw2/diagrams/diagrams-audio peak finder.svg | 3347 ++ .../diagrams-2025-03-19_134608.zip | Bin 0 -> 22384 bytes .../diagrams-2025-03-21_094401.zip | Bin 0 -> 22543 bytes .../cw2/diagrams/diagrams-initial amplifier.svg | 3263 ++ .../diagrams-push pull power amplifier.svg | 3521 ++ electronics/cw2/diagrams/diagrams-receiver.svg | 3080 ++ .../diagrams/diagrams-volume boost amplifier.svg | 3479 ++ electronics/cw2/diagrams/diagrams.svg | 45706 +++++++++++++++++++ electronics/cw2/diagrams/initial-amplifier.png | Bin 0 -> 330263 bytes electronics/cw2/diagrams/peakfinder.png | Bin 0 -> 18792 bytes .../cw2/diagrams/push pull power amplifier.png | Bin 0 -> 240778 bytes electronics/cw2/diagrams/receiver.png | Bin 0 -> 295532 bytes electronics/cw2/diagrams/report.txt | 0 .../cw2/diagrams/volume boost amplifier.png | Bin 0 -> 317415 bytes electronics/cw2/timetable.org | 2 +- electronics/cw2/writeup.tex | 126 +- 36 files changed, 69195 insertions(+), 8 deletions(-) create mode 100644 comp/lucas-standen-NEA/code2/appendsnprintf.o create mode 100644 comp/lucas-standen-NEA/code2/comp.o create mode 100644 comp/lucas-standen-NEA/code2/examples/tmp.zpy.c create mode 100644 comp/lucas-standen-NEA/code2/fileread.o create mode 100644 comp/lucas-standen-NEA/code2/stdlib/String/String.o create mode 100644 comp/lucas-standen-NEA/code2/stdlib/zpylib.o create mode 100644 comp/lucas-standen-NEA/code2/tokenizer.o create mode 100644 comp/lucas-standen-NEA/code2/util.o create mode 100755 comp/lucas-standen-NEA/code2/zpy create mode 100644 comp/lucas-standen-NEA/code2/zpy.o create mode 100644 comp/work/49/examq create mode 100644 comp/work/49/sheet create mode 100644 electronics/cw2/diagrams/AM demodulation.png create mode 100644 electronics/cw2/diagrams/AM-demod.gif create mode 100644 electronics/cw2/diagrams/AM-demod.png create mode 100644 electronics/cw2/diagrams/audio intensitity meter.png create mode 100644 electronics/cw2/diagrams/audio peak finder.png create mode 100644 electronics/cw2/diagrams/diagrams-AM demodulation.svg create mode 100644 electronics/cw2/diagrams/diagrams-audio intensitity meter.svg create mode 100644 electronics/cw2/diagrams/diagrams-audio peak finder.svg create mode 100644 electronics/cw2/diagrams/diagrams-backups/diagrams-2025-03-19_134608.zip create mode 100644 electronics/cw2/diagrams/diagrams-backups/diagrams-2025-03-21_094401.zip create mode 100644 electronics/cw2/diagrams/diagrams-initial amplifier.svg create mode 100644 electronics/cw2/diagrams/diagrams-push pull power amplifier.svg create mode 100644 electronics/cw2/diagrams/diagrams-receiver.svg create mode 100644 electronics/cw2/diagrams/diagrams-volume boost amplifier.svg create mode 100644 electronics/cw2/diagrams/diagrams.svg create mode 100644 electronics/cw2/diagrams/initial-amplifier.png create mode 100644 electronics/cw2/diagrams/peakfinder.png create mode 100644 electronics/cw2/diagrams/push pull power amplifier.png create mode 100644 electronics/cw2/diagrams/receiver.png create mode 100644 electronics/cw2/diagrams/report.txt create mode 100644 electronics/cw2/diagrams/volume boost amplifier.png (limited to 'electronics/cw2/timetable.org') diff --git a/comp/lucas-standen-NEA/code2/appendsnprintf.o b/comp/lucas-standen-NEA/code2/appendsnprintf.o new file mode 100644 index 0000000..5944591 Binary files /dev/null and b/comp/lucas-standen-NEA/code2/appendsnprintf.o differ diff --git a/comp/lucas-standen-NEA/code2/comp.o b/comp/lucas-standen-NEA/code2/comp.o new file mode 100644 index 0000000..8c8ed6c Binary files /dev/null and b/comp/lucas-standen-NEA/code2/comp.o differ diff --git a/comp/lucas-standen-NEA/code2/examples/tmp.zpy.c b/comp/lucas-standen-NEA/code2/examples/tmp.zpy.c new file mode 100644 index 0000000..6a5c51e --- /dev/null +++ b/comp/lucas-standen-NEA/code2/examples/tmp.zpy.c @@ -0,0 +1,5 @@ +#include +èz7üb~MUp(); +Ð}7üb¸}7übstring* str = Ð}7übString("hello_world"); + }7übprintstr(str->_str); +˜|7übprintchar('\n'); diff --git a/comp/lucas-standen-NEA/code2/fileread.o b/comp/lucas-standen-NEA/code2/fileread.o new file mode 100644 index 0000000..7e4345d Binary files /dev/null and b/comp/lucas-standen-NEA/code2/fileread.o differ diff --git a/comp/lucas-standen-NEA/code2/stdlib/String/String.o b/comp/lucas-standen-NEA/code2/stdlib/String/String.o new file mode 100644 index 0000000..aa70cc9 Binary files /dev/null and b/comp/lucas-standen-NEA/code2/stdlib/String/String.o differ diff --git a/comp/lucas-standen-NEA/code2/stdlib/zpylib.o b/comp/lucas-standen-NEA/code2/stdlib/zpylib.o new file mode 100644 index 0000000..910797f Binary files /dev/null and b/comp/lucas-standen-NEA/code2/stdlib/zpylib.o differ diff --git a/comp/lucas-standen-NEA/code2/tokenizer.o b/comp/lucas-standen-NEA/code2/tokenizer.o new file mode 100644 index 0000000..8b45a46 Binary files /dev/null and b/comp/lucas-standen-NEA/code2/tokenizer.o differ diff --git a/comp/lucas-standen-NEA/code2/util.o b/comp/lucas-standen-NEA/code2/util.o new file mode 100644 index 0000000..62e23ff Binary files /dev/null and b/comp/lucas-standen-NEA/code2/util.o differ diff --git a/comp/lucas-standen-NEA/code2/zpy b/comp/lucas-standen-NEA/code2/zpy new file mode 100755 index 0000000..6fb253e Binary files /dev/null and b/comp/lucas-standen-NEA/code2/zpy differ diff --git a/comp/lucas-standen-NEA/code2/zpy.o b/comp/lucas-standen-NEA/code2/zpy.o new file mode 100644 index 0000000..2f42f5e Binary files /dev/null and b/comp/lucas-standen-NEA/code2/zpy.o differ diff --git a/comp/skeleton/skel.py b/comp/skeleton/skel.py index 75c4ef9..762a96f 100644 --- a/comp/skeleton/skel.py +++ b/comp/skeleton/skel.py @@ -35,6 +35,8 @@ def PlayGame(Targets, NumbersAllowed, TrainingGame, MaxTarget, MaxNumber): while not GameOver: DisplayState(Targets, NumbersAllowed, Score) UserInput = input("Enter an expression: ").replace(' ', '') + if (UserInput == "QUIT"): + break print() if CheckIfUserInputValid(UserInput): UserInputInRPN = ConvertToRPN(UserInput) diff --git a/comp/work/49/examq b/comp/work/49/examq new file mode 100644 index 0000000..76068ef --- /dev/null +++ b/comp/work/49/examq @@ -0,0 +1,7 @@ +2.1) 36 +2.2) 7111 +2.3) they are not high or low, they can be any value in a range, thus it is not digital, the pixel values can be digital, as they are a single representable value, which can be written in binary. +2.4)i) 20 +2.4)ii) 26 +2.5) it is not worth it, as it makes the file larger + diff --git a/comp/work/49/sheet b/comp/work/49/sheet new file mode 100644 index 0000000..62a77c6 --- /dev/null +++ b/comp/work/49/sheet @@ -0,0 +1,7 @@ +1.1)1) yes +1.1)2) no +1.1)3) yes + +1.2) ::= | + +2.3) diff --git a/electronics/cw2/diagrams/AM demodulation.png b/electronics/cw2/diagrams/AM demodulation.png new file mode 100644 index 0000000..e34c714 Binary files /dev/null and b/electronics/cw2/diagrams/AM demodulation.png differ diff --git a/electronics/cw2/diagrams/AM-demod.gif b/electronics/cw2/diagrams/AM-demod.gif new file mode 100644 index 0000000..00ae19f Binary files /dev/null and b/electronics/cw2/diagrams/AM-demod.gif differ diff --git a/electronics/cw2/diagrams/AM-demod.png b/electronics/cw2/diagrams/AM-demod.png new file mode 100644 index 0000000..d3785c9 Binary files /dev/null and b/electronics/cw2/diagrams/AM-demod.png differ diff --git a/electronics/cw2/diagrams/audio intensitity meter.png b/electronics/cw2/diagrams/audio intensitity meter.png new file mode 100644 index 0000000..412e083 Binary files /dev/null and b/electronics/cw2/diagrams/audio intensitity meter.png differ diff 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++15V + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +R1 +R1 + + + + + + + + + + + + + + + + +1M +1M + + + + + + + + + + + + + + + +VSS +VSS + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +R3 +R3 + + + + + + + + + + + + + + + + + + + + + + + + +750K +750K + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/electronics/cw2/diagrams/initial-amplifier.png b/electronics/cw2/diagrams/initial-amplifier.png new file mode 100644 index 0000000..ba42248 Binary files /dev/null and b/electronics/cw2/diagrams/initial-amplifier.png differ diff --git a/electronics/cw2/diagrams/peakfinder.png b/electronics/cw2/diagrams/peakfinder.png new file mode 100644 index 0000000..2bac70e Binary files /dev/null and b/electronics/cw2/diagrams/peakfinder.png differ diff --git a/electronics/cw2/diagrams/push pull power amplifier.png b/electronics/cw2/diagrams/push pull power amplifier.png new file mode 100644 index 0000000..3518ea6 Binary files /dev/null and b/electronics/cw2/diagrams/push pull power amplifier.png differ diff --git a/electronics/cw2/diagrams/receiver.png b/electronics/cw2/diagrams/receiver.png new file mode 100644 index 0000000..b2aa178 Binary files /dev/null and b/electronics/cw2/diagrams/receiver.png differ diff --git a/electronics/cw2/diagrams/report.txt b/electronics/cw2/diagrams/report.txt new file mode 100644 index 0000000..e69de29 diff --git a/electronics/cw2/diagrams/volume boost amplifier.png b/electronics/cw2/diagrams/volume boost amplifier.png new file mode 100644 index 0000000..8c855a7 Binary files /dev/null and b/electronics/cw2/diagrams/volume boost amplifier.png differ diff --git a/electronics/cw2/timetable.org b/electronics/cw2/timetable.org index 025e2f8..9c6a6a7 100644 --- a/electronics/cw2/timetable.org +++ b/electronics/cw2/timetable.org @@ -2,7 +2,7 @@ have the finished system build by (14/3/25 friday) done on the (12/3/25) * system design - try to finish the diagrams, descriptions etc by the (16/3/25 sunday) + try to finish the diagrams, descriptions etc by the (16/3/25 sunday) done on 19/3/25 alternative designs and complete diagram done by (19/3/25 wednesday) * system testing diff --git a/electronics/cw2/writeup.tex b/electronics/cw2/writeup.tex index 834cf4d..eeb6a93 100644 --- a/electronics/cw2/writeup.tex +++ b/electronics/cw2/writeup.tex @@ -11,6 +11,7 @@ \usepackage{setspace} \usepackage{ragged2e} \usepackage{graphicx} +\usepackage{siunitx} \graphicspath{ {./images/} } \definecolor{codegreen}{rgb}{0,0.6,0} @@ -101,14 +102,14 @@ To build my project, I will split it into manageable subsections, that can each \subsubsection{The receiver} This system will receive data from from the radio waves from an antenna, here is its circuit diagram: -PUT SYSTEM HERE +\includegraphics[width=\textwidth]{diagrams/receiver.png} To test this system, I can use a signal generator to create an AM wave, then put the output into a large wire, and finally I can compare the outputs of the signal generator, and the output from the inductor and capacitor, and check if they are the same. \subsubsection{The initial amplifier} This amplifier's job is to increase the voltage of the input, as the revive will only output at ~1V-3V, which is not enough to trigger my other components, it should have a gain of around 5. Here is its circuit diagram: -PUT SYSTEM HERE +\includegraphics[width=\textwidth]{diagrams/initial-amplifier.png} I have used inverting amplifiers throughout this build as they are generally less noisy than non-inverting amplifiers and I can control the input impedance. @@ -117,27 +118,27 @@ To test this system I will put a voltage of around ~1-3V and test if it multipli \subsubsection{The demodulation system} % can probably show an alternative to this This system will convert the AM wave to a unmodulated regular wave, it will also use a decoupling capacitor to remove any DC offset that is caused by the previous components. Here is its circuit diagram: -PUT SYSTEM HERE +\includegraphics[width=\textwidth]{diagrams/AM demodulation.png} To test this I will put in a modulated sine wave into it and confirm that I receive the original wave as an output. \subsubsection{The volume boost amplifier} % perhaps show an alternative for here This is just another op amp, but with different resistor values. Here is its circuit diagram: -PUT SYSTEM HERE +\includegraphics[width=\textwidth]{diagrams/volume boost amplifier.png} Like the previous amplifier it can be tested by putting into a wave into it and checking it was multiplied by the correct gain. \subsubsection{The audio normalisation filter} This is a filter that will only show the peaks of the output from the previous systems, this will allow the micro controller to properly poll the input for the next subsystem. Here is its circuit diagram: -PUT SYSTEM HERE +\includegraphics[width=\textwidth]{diagrams/audio peak finder.png} To test this, I can put a sine wave in as input, and then I will check if I see a sine-like wave with smaller troths. \subsubsection{The audio intensity meter} This system will consist of a micro controller and a bar graph, it will use the output of the volume boost amplifier as an input and will display the amplitude of the output on 4 bits of a bar graph. Here is its circuit diagram: -PUT SYSTEM HERE +\includegraphics[width=\textwidth]{diagrams/audio intensitity meter.png} The code can be seen here: \lstinputlisting[language=C, caption=\textit{using C syntax highlighting to add some colour to the world}]{./final.asm} @@ -149,7 +150,7 @@ To test this system, I can check which amplitude of signals makes the graph outp \subsubsection{The push pull power amplifier} % can definitely show an alternative for this This system will massively boost the current of the input, which will make it audible on a speaker. To make the audio sound better, I will use an op amp to remove crossover distortion. Here is its circuit diagram: -PUT SYSTEM HERE +\includegraphics[width=\textwidth]{diagrams/push pull power amplifier.png} To test this system, I can measure the current in and the current out, and see how the compare. @@ -162,13 +163,124 @@ Here is the full set of diagrams all put together, when used like this, my syste \subsection{Subsystem testing} % tables, tables and more tables, no need to show the actual testing, the next section is for that +To test my system, I will put values into each subsystem individually, then put it all together, at the end to create my full project. \subsubsection{The receiver} +The receiver was tested by putting a signal through a signal generator, that AM modulates the input, and putting that through a large antenna in the room, then using the large inductor as a receiving antenna. I can then use an oscilloscope to compare the inputs, to the outputs. + +Here is a table of the inputs Vs the outputs I received. I read these values of an oscilloscope. + +\begin{center} + \begin{tabular}{ |c|c| } + \hline + signal in & signal out\\ + \hline + 0v & 0v \\ + 1.25v & 1.20v \\ + -1.25v & -1.21v \\ + 0.5v & -0.48v \\ + \hline + \end{tabular} +\end{center} + +The result show that, there is a little bit of noise, however there is a clear resemblance on the input, so I would say this works. There is also, on average, a drop in voltage, which is most likely signal drop off, this is a very small drop so it is of no significance + \subsubsection{The initial amplifier} +Like the receiver, this system can be tested by putting in an input signal, that is around -1.5v - 1.5v, as this is my desired input signal. The amplifier should have a gain of -4.7. + +\begin{center} + \begin{tabular}{ |c|c| } + \hline + signal in & signal out\\ + \hline + 0v & 0v \\ + 0.5v & -2.4v \\ + -0.5v & 2.6v \\ + 1v & -5.2v \\ + -1.25v & 7.4v \\ + \hline + \end{tabular} +\end{center} + +The table, like before, there is a small amount of noise, however it shouldn't have to much effect. The amplifier is an inverting amplifier, so that is why the values flip. The observed gain is -4.8, which means that is a very close to the desired value. + \subsubsection{The demodulation system} +To test this system, I can input signals in the range -3v - 3v and see if the output is the demodulated output. + +This system, should have a response curve that looks something akin to this, note the dips in the signal that match the carrier wave: + +\includegraphics[width=\textwidth]{diagrams/AM-demod.png} + +PUT PHOTO HERE + +Mine had slightly larger distorted dips in the signal, however it achieved the same thing. + \subsubsection{The volume boost amplifier} +This amplifier should have a gain of -2.35, however while testing, I realized I had made a mistake, I had used a 1M\si{\ohm} instead of the indented 2M\si{\ohm}. This caused it to have a gain of -4.7. After fixing this mistake, I took these results. + +\begin{center} + \begin{tabular}{ |c|c| } + \hline + signal in & signal out\\ + \hline + 0v & 0v \\ + 0.5v & -1.2v \\ + 1v & -2.4 \\ + 2v & -4.5 \\ + -0.5v & 1.4v \\ + -1v & 2.4 \\ + -2v & 4.6 \\ + \hline + \end{tabular} +\end{center} + +This shows the expected gain, this subsystem works. + \subsubsection{The audio normalisation filter and dividing amplifier} +This system needs to lower the input frequency and only output the high points. This system will behave similarly to my AM demodulation system. The desired output, should be close to the following: + +\includegraphics[width=\textwidth]{diagrams/peakfinder.png} + +PUT YOUR PHOTO HERE + +As you can see mine is not a close to the desired output, however it is still close enough that the micro controller will be able to poll the input. A more accurate design can be made using an op amp. + \subsubsection{The audio intensity meter} +Testing this system can be achieved by imputing voltages into it, and depending on their amplitude, the different modes of the bar graph should trigger. + +When tested it acted like so: +\begin{center} + \begin{tabular}{ |c|c| } + \hline + signal in & bar graph output\\ + \hline + 0v & 0001 \\ + 1v & 0001 \\ + 2v & 0011 \\ + 3v & 0011 \\ + 4v & 0111 \\ + 5v & 1111 \\ + \hline + \end{tabular} +\end{center} + +This is my desired output. The input signals will be between 0v-5v. A low voltage input, results in only 1 of the LEDs being on and higher voltages result in more LEDs come on. + \subsubsection{The push pull power amplifier} +This subsystem should be tested for the current it outputs and, unlike the rest, not the voltage. Using the formula +\begin{center} + \[ P = \frac{V^2}{8R_L} \] + I can calculate the maximum output power. I can then use the known value of Vin, to solve for current. + \[ P = \frac{30^2}{8 \times 8} \] + \[ P = \frac{900}{96} \] + \[ P = 9.375W \] + The maximum input however is not 30v, while in theory the power supply outputs that, the actual value will be closer to 10v at peak + \[ P = \frac{10^2}{8 \times 12} \] + \[ P = \frac{100}{96} \] + \[ P = 1.04W \] + This is still far higher than the average voltage as for the most part as the peak is rarely hit, + +\end{center} + \subsubsection{The speaker} \subsection{Subsystem results} -- cgit v1.2.3