File:Technics RS-M270x mech with white replacement LED.jpg
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DescriptionTechnics RS-M270x mech with white replacement LED.jpg |
English: Technics RS-M270x mech with white replacement LED in place of (long dead) incandescent bulb. Needs very small 3mm. dia. (or smaller) LED to fit. Needs some clipping of the stock rubber mounting gasket. This is a very bright 6000 mCd white LED, much brighter at 10 mA (appr. 20 mW) than 60 mW incandescents. However, the yellow-green opaque plastic window blocks most of light output.
Datasheet says that this LED has two spectral peaks, a sharp one at around 460nm (blue - this is mostly lost in the prism) and a flatter one at 500...600 nm (yellow-green - it passes through albeit at a loss too). This is typical for phosphor-based LEDs: the primary blue LED ignites the yellow-green phosphorus via the Stokes shift. Obviously, the existing 12V DC power supply cannot be fed into the LED directly - needs a series resistor (1kOhm 1W will do for a superbright LED). There's plenty of free space on the PSU PCB for such resistor. |
Date | |
Source | Own work |
Author | Retired electrician |
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http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
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current | 23:11, 12 December 2021 | 2,000 × 1,122 (424 KB) | Retired electrician (talk | contribs) | Uploaded own work with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon EOS REBEL SL1 |
Exposure time | 1/160 sec (0.00625) |
F-number | f/5.6 |
ISO speed rating | 800 |
Date and time of data generation | 02:26, 13 December 2021 |
Lens focal length | 40 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | DxO PhotoLab 2.1 |
File change date and time | 02:26, 13 December 2021 |
Exposure Program | Aperture priority |
Exif version | 2.3 |
Date and time of digitizing | 02:26, 13 December 2021 |
Meaning of each component |
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APEX shutter speed | 7.375 |
APEX aperture | 5 |
APEX exposure bias | −0.66666666666667 |
Subject distance | 0.61 meters |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 00 |
DateTimeOriginal subseconds | 00 |
DateTimeDigitized subseconds | 00 |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 5,798.6577181208 |
Focal plane Y resolution | 5,788.9447236181 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |
GPS tag version | 0.0.3.2 |
Rating (out of 5) | 0 |