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31 votes
Accepted

Why is there no rolling shutter when using a mechanical shutter?

When I have a camera, that can take still images at 10fps with a mechanical shutter, why doesn't it mean the sensor can take images at 10fps electronically without producing rolling shutter? In order ...
Sven B's user avatar
  • 5,167
27 votes
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What challenges restrict the resolution of spacefaring digital cameras?

There is one overriding requirement for deep-space missions: reliability. In general NASA Preferred Parts are quite stodgy, because the overriding need is for a mature, well-understood technology. ...
WhatRoughBeast's user avatar
22 votes

Why is there no rolling shutter when using a mechanical shutter?

There are two parts to this: First, rolling shutter can still occur with (some, see note) mechanical shutters. However, this is only at short exposure times. The shutter is built out of two curtains. ...
Joren Vaes's user avatar
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12 votes
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Remote's IR signal viewed in my phone's camera is flashing. Shouldn't it look steady with a 38kHz carrier frequency?

Figure 1. Image source: Adafruit. The data is modulated on the 38 kHz carrier as shown in the image above. The 38 kHz is transmitted in bursts and it's the bursts your camera is detecting. You are ...
Transistor's user avatar
  • 176k
12 votes

Could I power a corded device with batteries?

It will probably work for at least a little while. The issue is that a "1.5V" alkaline battery starts at around 1.6V and drops down to 1V over the life of the cell. The camera can probably ...
Drew's user avatar
  • 7,023
12 votes

Building an MRI safe video camera (e.g. webcam)

TL;DR: there is a reason why often endoscope or fibre optic cameras are used - I recommend to stick with those solutions. Long story: There is no way to tell without knowing the exact application, e.g....
Christian B.'s user avatar
  • 1,986
12 votes

Building an MRI safe video camera (e.g. webcam)

This answer is a bit off-topic for the site, but here goes. Note that in comments you specify that the commercial product that you have isn't suitable for your use, but I'll point out that the ...
Scott Seidman's user avatar
11 votes

What challenges restrict the resolution of spacefaring digital cameras?

You seem to be under the impression that the quality of photos taken in space is limited by the sensor resolution, which is not the case. Equally important factors are the sensor sensitivity, which ...
Dmitry Grigoryev's user avatar
11 votes

What is this part of the webcam called?

This is basically a complete camera sensor & lens assembly in a single SMD component. Sparkfun use to sell something like this here - SEN8667 The part that you unscrewed was likely used to focus ...
Sneaky Puffin's user avatar
10 votes

Electric shock from outdoor security cameras

It's not a strong electric shock else you'd be shouting that from the rooftops so, I am presuming you mean something more like an irritating tingle. Based on that assumption I would suggest that the ...
Andy aka's user avatar
  • 460k
10 votes

Can I use my old Sony Camera's Night Shot to detect shorts?

No, the wavelengths of IR that your camera senses are much different than those emitted by warm objects.
Elliot Alderson's user avatar
8 votes
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What do smartphone manufacturers do differently with their cameras than the Raspberry Pi module camera

I'd say the difference is 20% due to hardware and 80% due to software. The hardware side The smartphone probably has better optics and wider aperture; The smartphone has focusing. The Pi has fixed ...
anrieff's user avatar
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8 votes
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What is this part of the webcam called?

They're often called "board lenses". They can be either integrated in with the sensor, or interchangeable. The interchangeable ones are usually "M12": http://www.m12lenses.com/...
user1850479's user avatar
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7 votes
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Why does physically touching a specific pin eliminate circuit issues?

Touching a pin does not eliminate the circuit issue, it just hides it. Your circuit still have an issue, and a big one - this particular CAM_DATA[7] bus signal has insufficient timing relative to bus ...
Ale..chenski's user avatar
  • 40.8k
7 votes
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Help me identify an SMD diode

It's a Littelfuse SMBJ43CA bi-directional TVS diode. (Source: lcsc.com)
nanash1's user avatar
  • 4,946
6 votes

dvp vs mipi camera interface

I've been looking into camera interfaces recently too, so excuse me if I misspeak, but I think they're essentially different ways of communicating over the same port, in the sense that TCP and UDP are ...
haxonek's user avatar
  • 61
6 votes

Are semiconductors (specifically silicon) the only materials that can be used for making image sensors in digital cameras?

What we see here is a discrete-time (discrete hole positions), discrete-value (which of the defined hole positions are perforated) processing of an image. So, a digital camera! No semiconductors ...
Marcus Müller's user avatar
5 votes

What challenges restrict the resolution of spacefaring digital cameras?

Think more like 10 years before launch. Once it's designed, it's designed - changing components is a major risk factor and they're unlikely to want to do that. A massive amount of that time will ...
Graham's user avatar
  • 6,170
5 votes

Arduino Beetle and Camera

None. That high speed synchronous serial camera is simply not compatible with an Arduino. Nor is USB an option - the Arduino can only be a USB device, which means it cannot talk to another USB ...
Chris Stratton's user avatar
5 votes
Accepted

Fake a panasonic battery to revive camera to copy photos from internal memory

Allright, finally we done it! @KalleMP had the eye opener, however this was a slightly different battery (DMW-BLG10E instead of the DMW-BCG10E and it is fore sure another "valid and safe battery ...
Codebeat's user avatar
  • 1,346
5 votes

Remote's IR signal viewed in my phone's camera is flashing. Shouldn't it look steady with a 38kHz carrier frequency?

No, because the 38kHz is turned on and off to send data, it won't be continuous 38kHz signal. And the code is repeated few times per second. But yes, if it was a continuous 38kHz modulated light, the ...
Justme's user avatar
  • 152k
5 votes
Accepted

Why does pixel binning remove colors and provide monochrome image only with CMOS color cameras?

It could be because of the Bayer (color filter) array, although that depends on the camera manufacturer making a particular set of decisions. Adjacent pixels have filters in front of them that make ...
hobbs's user avatar
  • 7,468
5 votes

Could I power a corded device with batteries?

Use whatever batteries you want. Use a SEPIC converter, it is a buck boost combined and set the output to what you want. It will automatically switch modes depending on the input output delta. Nice ...
Gil's user avatar
  • 5,173
4 votes

Why does the accuracy of my camera drop when I start using no-ops as delays?

What most probably happened is the compiler decided to optimize your code and threw those nop's away. You should force the compiler to keep your assembly intact by ...
Dmitry Grigoryev's user avatar
4 votes

a camera which records images at different wavelengths using optical filters

You use a black/white sensor that has no RGB filters. Then, you put your IR filter in front of the camera. Now you have a camera that sees infrared only. Most CMOS camera elements are IR sensitive ...
JRE's user avatar
  • 71.9k
4 votes

What is this white device?

I don't know where you live, but in Europe there are a number of free wireless networks. My neighbor operates a node that is part of such a network and the antennas look a little bit unusual. These ...
Mario's user avatar
  • 8,195
4 votes
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Calculating Fuse Size

A first-order approximation would be: \${22.5\text{W} \over 0.7} \approx 32\text{W}\$ \${32\text{W} \over 12\text{V}} \approx 2.67\text{A}\$ So a 3A fuse should suffice. ... would likely not ...
Ignacio Vazquez-Abrams's user avatar
4 votes
Accepted

Where to start when designing a custom PCB as per requirements?

This is likely more involved than you think it is. Streaming video is not trivial. In particular, streaming video with a microcontroller is not typically done, unless you are talking about very small ...
uint128_t's user avatar
  • 8,734
4 votes

Overclocking an image sensor for higher FPS

In general, image quality will drop rapidly. The sensor circuitry is carefully designed to minimize internal noise and crosstalk, but it is usually optimized for the specified master clock frequency ...
Dave Tweed's user avatar
  • 173k

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