Recent content by carmatic

Correction, the link for item 3 , the green dichroic filter, is https://www.edmundoptics.com/p/125mm-diameter-45deg-green-dichroic-filter/7285/

I have access to a laser cutter and I have also built a provisional enclosure for the parts. I already own most of the parts except the confocal pinhole setup. I tried it out with a plastic bottle; The main plastic bottle body gives a broad response from green to red, while the bottle cap has a...

Hello everyone, I am attempting to make a Raman spectrometer which can double as a microscope. It uses a 532nm laser for excitation, an infinity-corrected microscope objective to collimate the light, a 200 lines/mm diffraction grating, and a confocal lens pinhole setup. A 5 megapixel camera ...

Hello everyone, I am trying to use Maxwell 3D to simulate a rotating magnetic device , where 2 magnetically linked sections are rotating in opposite directions However, the program only allows one 'band' object for simulating rotating parts Is there a way to overcome this problem?

today i have finally put together the ferrite-core rebuild of the alternator , where the only paramagnetic elements are the ferrite cores themselves... without the 'control elements' to ensure the counter rotation of the secondary rotor, the cogging has practically entirely dissapeared, it is...

i was reading an article about the Kaman K-max being used as a UAV, and there were comments about how this helicopter is harder to fly than a traditional main-and-tail-rotor helicopter ... the large number of accidents of the K-max also seems to suggest the same thing why is this? to me, the...

more ideas in the current form of having an element in the middle of each coil , this is analogous to a single pentagon... when you have a pair of points rotating concentrically over the pentagon, they will overlap with a vertex of the pentagon 10 times therefore, there are 10 'peaks' and...

that seems to only apply for a single layer of wire coiled onto the core in order to account for multiple layers of wire, it looks like it will take calculating a linear combination ( http://en.wikipedia.org/wiki/Linear_combination ) where you have an integer multiple of T?

suppose that i have a wire with a known thickness ... and i want to wind it around a solid cylinder with known dimensions, and in the end make a coil with the same length as the solid cylinder how do i relate between the length of wire required and the diameter of this coil?

there was abit of wind today so i decided to do some wind testing...it was dissapointing, partly because my voltage regulator for powering 5V usb devices only actually outputs 4.5v , and in any case i don't have a lot of things to plug into it anyway... but the main reason is that it seems that...

its not just capacitance at the input, but the internal capacitors of the intergrated circuit need time to work too

it 1.1kw the maximum power it is rated to handle? in that case, it is almost certainly trading efficiency for compactness and perhaps cost... without knowing the inner workings of the device, i can only suppose that a larger voltage converter would beat it in terms of minimizing energy loss

the only way i can think of to simultaneously get 12v and 24v at the same time... is to use some electronic circuitry to constantly and rapidly switch between serial and parallel connections of the batteries, and between 2 positive-negative pairs of output terminals, one positive-negative pair...

actually a tribolectric static starter for a low voltage system seems like a pretty practical idea... youd start it like you light a match, and get the feedback loop going

what should be the ratio between the capacitance of the capacitors in the three AC lines , and that of the capacitors in the DC line at the bottom? should all the capacitors be the same value ... even though there are AC lines, with an identical capacitor in each of them, the total 'linear'...