Tag: idea

Not a new idea, there are plenty. The ones out there aren’t well designed. I can do better, I have sketched better. What form it should take I don’t know, maybe a web app.

Getting the weather forecast, and acting on it. Shutter when it going to rain.

Noise. Temperature control, what amount does heat affect the drying time. Does temperature change hold hair. Ion breeze. Is there be a non contact way of sensing humidity? What is the most efficient diffuser?

Resources: overview, worksheets, linear least squares, linear interpolation.

When you have a few data points from a sensor, I haven’t found an easy way to calibrate. There are linear, quadratic, cubic, logarithmic curves.

It could be you enter data or draw how you want the curve to act, adding more control points if needed. It would output the equation if drawn, or different equations with the calculated error from the data given. Speed v accuracy being the trade off.

So much wasted time in Math. There should be a math test for people 5 years after they graduate high school. When the results are back you can pay me to consult how to improve it, part of the problem will be what you test on- that advice is free.

Starting point is linear with two points.

Equations: m = (y2- y1) / (x2 – x1) and with a point, y – y1 = m(x – x1)

In my case color sensor I wanted 1505 to output 0, and 361 to output 255.
m = (255-0) / (361-1505) = -0.223
coefficient = 255 / min-max

y – 0 = -0.223(x -1505) => y = -0.223+ 335
intercept = coefficient * -max

You can enter (1505,0)(361,255) into Wolfram and get an exact answer, Wolfram language may be a way to solve complex problems.

References: Motion Sensor, How it works, Scanner, Build, Vehicle sensor

Measuring absolutely distance traveled.

References: Bike induction light

There are a few things using POV and displaying an image on your bike tire as it spins, or using directional light giving you a headlight.

References: Mini Powersupply

Voltmeters
Independent switches
Li-Po charging IC, probably with 5V/USB charging
Buck-boost regulators
Pass through external power
Monitoring the battery status

A breadboard has 2 power rails, it would be nice to supply different voltages to both of them, so the first version could adjust from 0-24V. To keep it small a lithium battery could be used and two adjustable buck-boost converters with two voltmeters. Max 500mA-1A current is plenty.

Version 2 could have a negative rail, or an inverting buck boost power supply, also Ammeters.

The forecast for tomorrow is a sunny 28°c (82°F) and the low that evening is 16°C (61°F), we’d open the windows.

The forecast is for rain and belbow the desired room temperature tomorrow, even if cold that evening, it doesn’t want to open up.

Using weather APIs it would make intelligent decisions on when to cool, and based on historical temperature data it would know how long to cool for, it takes and hour, or five to reach the same outside temperature. The lowest temperature isn’t around for hours, so it would learn the heating/ cooling profiles for the room. Lowest temperature at 3am, takes three hours for the temperature of the room to drop that amount. Then from 2am to 4am it should be on. It can happen that the outside temperature is cooler than the inside and that is still true all day, but that ignores the home insulation, so there might be a point it should stop if the rate of change (derivative) of the forecast temperature is greater than the closed room rate of change.

APIs and a few simpler algorithms, a window fan with shutters for rain and sunlight. Temperature and confrontation (end stop) sensors.

My sister came back from Hawii and the heat is too much. I have heard about Cosplay cooling suits, so a modification of one of those would be great. If you can cool, with a few methods it’s easy to heat so why not both. In the desert it gets really hot and really cold, also in space.

I could see decent performance passively for heat, but cold needs something else.

References: Make, Instructable

Seems like improvements would be to maintain an exact temperature so that the plastic sheet wouldn’t burn, and the vacuum table could be more of a fine grid. There is a plastic heater thing that has a heating element under a hollow bar of metal. So a double sided metal plate like a panini press would be the best for heating evenly. I label my solder with what temperature it melts at, determining the right temperature for a type of plastic would be ideal, I’m thinking halfway between melting and browning/burning. A better vacuum plate would be next.