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rc_natural_response2.html
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rc_natural_response2.html
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<html>
<head>
<style>
#exponential2 {
margin: auto
}
svg .grid {
stroke-width: 0.5px;
stroke: #BBB;
opacity: 0.5;
}
svg .domain {
stroke-width: 3px;
stroke: black;
}
svg {
border: none;
}
svg .path {
stroke-width: 3px;
stroke: #FF9C39; /* KA econ2 */
fill: none;
}
svg text {
font: 18px katex_main;
}
svg .tick text {
font: 12px katex_math;
}
</style>
</head>
<body>
<button id="start2" class="button">Start</button>
<div id="exponential2"></div>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
(function () {
var margin = { top:0, right:0, bottom:0, left:0 }; // margin outside border
var padding = { top:40, right:100, bottom:40, left:40 }; // padding inside border
var
time,
xmin = -1,
xmax = +8,
ymin = -.2,
ymax = +1.2,
hScale = 40,
vScale = 200,
width = (xmax - xmin) * hScale, // width of graph axes pixels
height = (ymax - ymin) * vScale, // height of graph axes pixels
xOrigin = -(xmin * hScale), // pixels
yOrigin = height + (ymin * vScale); // pixels
// main container
var svgContainer = d3.select("#exponential2")
.append("svg")
.attr("width", width + padding.left + padding.right) //width of image
.attr("height", height + padding.top + padding.bottom) //height of image
.attr("transform",
"translate(" + margin.left + "," + margin.top + ")")
.append("g") //group to build image inside of, offset by padding from border
.attr("transform",
"translate(" + padding.left + "," + padding.top + ")");
d3.select("#exponential2").attr("align","center");
// scales
var xScale = d3.scaleLinear().domain([xmin, xmax]).range([0, width]);
var yScale = d3.scaleLinear().domain([ymin, ymax]).range([height, 0]);
// x axis
var xAxis = d3.axisBottom(xScale)
.ticks(8)
.tickSizeOuter(0);
svgContainer.append("g")
.classed("x-axis", true)
.attr("transform", function() {
return "translate(" + 0 + "," + yOrigin + ")";
})
.call(xAxis)
.append("text")
.attr("x", width)
.attr("dx", ".71em")
.text("t (nsec)")
.style("text-anchor", "start")
.style("font-size", "20px")
.style("font-family", "katex_math")
.style('fill', 'black');
// vertical grid lines
svgContainer.selectAll("g.x-axis g.tick")
.append("line")
.classed("grid", true)
.attr("x1", 0)
.attr("y1", -yOrigin)
.attr("x2", 0)
.attr("y2", height - yOrigin);
// y axis
var yAxis = d3.axisLeft(yScale)
.ticks(8)
.tickSizeOuter(0);
var ya = svgContainer.append("g")
.classed("y-axis", true)
.attr("transform", function() {
return "translate(" + xOrigin + "," + 0 + ")";
})
.call(yAxis)
.append("text")
.attr("dy", "-12px")
.text("v (volts)")
.style("text-anchor", "middle")
.style("font-size", "20px")
.style("font-family", "katex_math")
.style("fill", "black");
// horizontal grid lines
svgContainer.selectAll("g.y-axis g.tick")
.append("line")
.classed("grid", true)
.attr("x1", -xOrigin)
.attr("y1", 0)
.attr("x2", width - xOrigin)
.attr("y2", 0);
// remove "0"s near origin
svgContainer.selectAll(".tick text")
.filter(function (d) { return d === 0; })
.remove();
// Waveform - RC natural response example 1
// R = 1k C = 1pF Vo = 1.0v
var R = 1000;
var C = .000000000001;
var Vo = 1.0;
var nPoints = 200;
var samples = d3.range(0, nPoints + 1) // 0 1 2 3 ... 200
var fromX = 0;
var toX = xmax;
var xData = samples.map(function (i)
{ return ((i / nPoints) * (toX - fromX)) + fromX;
});
var response = d3.line()
.x(function (d) { return xScale(d); })
.y(function (d) { return yScale(Vo * (Math.exp(-d/(R*C)/1000000000))); });
svgContainer.append('svg:path')
.classed("path", true)
.attr('d', response(xData))
.style("fill", "none")
.style("stroke-linecap","round")
.style("stroke-width", "3px");
var lineData = [
{ "x": xmin, "y": Vo},
{ "x": 0, "y": Vo}];
var lineFunction = d3.line()
.x(function (d) { return xScale(d.x); })
.y(function (d) { return yScale(d.y); });
svgContainer.append('svg:path')
.classed("path", true)
.attr('d', lineFunction(lineData))
.style("stroke-width", "3px");
svgContainer.append("line")
.attr("x1", xScale(0))
.attr("y1", yScale(0.05))
.attr("x2", xScale(3))
.attr("y2", yScale(0.05))
.style("stroke-width", "1px")
.style("stroke-dasharray", ("3, 3"))
.attr("stroke", "black");
svgContainer.append("line")
.attr("x1", xScale(3))
.attr("y1", yScale(0.05))
.attr("x2", xScale(3))
.attr("y2", yScale(0))
.style("stroke-width", "1px")
.style("stroke-dasharray", ("3, 3"))
.attr("stroke", "black");
// Moving dot
var dot = svgContainer.append('svg:circle')
.attr("cx", xScale(-1))
.attr("cy", yScale(Vo))
.attr("r",5)
.style("fill", "#F9685D"); // KA HUM2
svgContainer.append("text")
.attr("x", xScale(12))
.attr("y", yScale(1.5))
.text("R = 3 kΩ")
.style("text-anchor", "start")
.style("font-size", "20px")
.style('fill', 'black');
svgContainer.append("text")
.attr("x", xScale(12))
.attr("y", yScale(1.2))
.text("C = 1 uF")
.style("text-anchor", "start")
.style("font-size", "20px")
.style('fill', 'black');
svgContainer.append("text")
.attr("x", xScale(12))
.attr("y", yScale(0.9))
.text("Vo = 1.4 V")
.style("text-anchor", "start")
.style("font-size", "20px")
.style('fill', 'black');
function draw() {
var x;
var y;
x = xScale(time);
if(time < 0) {
y = yScale(Vo);
}
else {
y = yScale(Vo * (Math.exp(-time/(R*C)/1000000000)));
}
dot
.attr('cx', x)
.attr('cy', y);
time += .05;
setTimeout(draw, 35, 30);
}
d3.select("#start2").on("click", function() {
dot
.attr("cx", xScale(-4))
.attr("cy", yScale(Vo));
time = -1;
draw();
});
})();
</script>
</body>
</html>