Black and white colour detection?

Black and white colour detection?

This might be asking for a lot with such little details, but what exactly is the best way to approach this problem? I have to rotate a black box until a white stripe lands in front of the sensor, at which point it should stop. Would an IR sensor work for this? The white is approximately paper white, and the black is a bit reflective if it matters.

This is what I had in mind so far. I'm guessing what I've given you guys isn't enough but is this type of thing at least in the right class of products?

https://www.digikey.ca/product-detail/en/akm-semiconductor-inc/AK9750/974-1145-2-ND/6343152

Thanks in advance.

Submitted January 21, 2018 at 09:53PM by Magikarp-Army
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Black and white colour detection?

How can the engines in our cars get smaller and smaller, yet deliver more power with greater efficiency?

How can the engines in our cars get smaller and smaller, yet deliver more power with greater efficiency?

What is being integrated into these smaller engines (that seem to becoming the norm in newer cars) that allows them to deliver the same power as a large older V6 or V8? I've always figured that we have been designing engines long enough that the process has been nearly perfected. How much change can you really make to a simple 4 stroke process to improve it so much?

Submitted January 21, 2018 at 09:34PM by TheMellophonist
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How can the engines in our cars get smaller and smaller, yet deliver more power with greater efficiency?

Designed a cryptex, looking for constructive criticism and manufacturing advice

Designed a cryptex, looking for constructive criticism and manufacturing advice

Hi everyone,

I designed my own version of a cryptex. I did a lot of research beforehand and got a lot of ideas/inspiration, but I believe my design is fairly unique. See my A360 files below.

I have a few questions. I am not an engineer, so I'm looking for any problems that you might see with my design, and any improvements you may suggest. I would also like advice on how/where to have it made. Not sure how many, right now I would just like to make one and see what it's like/have it for myself. However if it turns out really nice, I might consider having multiple made and sell them.

One last thought – I'm moving fairly slow on this project (heck, I designed this over a year ago and kinda forgot about it) and hobby money isn't abundant right now so even when I'm ready I might have to have it made in stages instead of all at once. With this in mind, after I post this, I don't really care if others take the idea and make their own, I just don't want to lose the "right" to make my own (e.g. someone takes my design and patents it preventing me from making my own device). Is there anything I need to do to protect myself or should I just not care?

Here is the A360 project: http://a360.co/2dNNbtA

Submitted January 21, 2018 at 08:44PM by jmarndt
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Designed a cryptex, looking for constructive criticism and manufacturing advice

Will this typo on my resume cost me a position?

Will this typo on my resume cost me a position?

So I recently graduated and I found this perfect job posting for an embedded system. One of the requirements was an understanding of UART,I2C, SPI.

One of my robotics team project I dealt with UART.

In my resume I said something along the lines of

"….Universal Asynchronous Recieve Transmit (USART)…"

However USART is something different and I accidentally typo'd USART instead of UART

Submitted January 21, 2018 at 04:55PM by intergalactic_priest
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Will this typo on my resume cost me a position?

Wikipedia article of the day for January 22, 2018

The Wikipedia article of the day for January 22, 2018 is S-50 (Manhattan Project).
The S-50 Project was the Manhattan Project’s effort to produce enriched uranium by liquid thermal diffusion during World War II. The process was developed by Philip H. Abelson and other scientists at the United States Naval Research Laboratory, and was one of three technologies for uranium enrichment pursued by the Manhattan Project. Pilot plants were built at the Anacostia Naval Air Station and the Philadelphia Navy Yard. A facility at the Clinton Engineer Works in Oak Ridge, Tennessee, was the only production-scale liquid thermal diffusion plant ever built. It could not enrich uranium sufficiently for use in an atomic bomb, but it could begin the process of enrichment that was completed by the Y-12 calutrons and the K-25 gaseous diffusion plants. It sped up the production of enriched uranium for the Little Boy bomb used in the atomic bombing of Hiroshima. This plant ceased production in September 1945, but was reopened in May 1946, and used by the Nuclear Energy for the Propulsion of Aircraft project of the US Army Air Forces before being demolished in the late 1940s.

Wikipedia article of the day for January 22, 2018

Design process question- Carbon Fiber Tub Chassis

Design process question- Carbon Fiber Tub Chassis

Hi everyone,

I'm on a university solar car team and looking at designing a carbon fiber tub for our next chassis. My team has historically built our chassis from interlocking plates of carbon fiber+aluminum honeycomb that were glued together, so I have no reference for the design process involved in making a tub. If anyone has any knowledge of how it's done in industry, I'm just trying to learn a lot right now and would love to hear stories.

Does anyone have any good starting points or thoughts for me? I have plenty of access to materials, an autoclave, etc., and I've done many layups before, but I need help figuring out design timelines, how to come up with a starting geometry, software modeling, mounting suspension & other components to this chassis, and so on. Would appreciate any thoughts or ideas. Let me know if you want additional information about my own setup and resources.

Thanks!

Submitted January 21, 2018 at 02:16PM by fjellvandrer
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Design process question- Carbon Fiber Tub Chassis