File:Hitachi HA12157 Dolby B-C IC on a perfboard.jpg
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[edit]DescriptionHitachi HA12157 Dolby B-C IC on a perfboard.jpg |
English: Hitachi HA12157NT Dolby B-C stereo IC. This is a 64-pin behemoth with built-in digital level control and recording EQ. Needs a microcontroller to initialize. 1.778 pin spacing. A quirky thing; the classic HA12058 or the Sony CX20187 are much more convenient (can't comment on sonics). ICs with 1.778 mm pin spacing can be mounted on 2.54-mm-spacing perfoards diagonally. Some bending of pins required. But it works, because 1.778 = square root of 2.54. Here, instead of bending the IC, I used 26-pin strips from a DIP socket with 1.778 mm spacing. The twelve lowermost pins belong to record EQ section and are unnecessary in a plain Dolby circuit. |
Date | |
Source | Own work |
Author | Retired electrician |
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[edit]I, the copyright holder of this work, hereby publish it under the following license:
This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:16, 14 November 2020 | 2,100 × 1,400 (814 KB) | Retired electrician (talk | contribs) | {{Information |Description={{en|Hitachi HA12157NT Dolby B-C IC. This is a 64-pin behemoth with built-in digital level control and recording EQ. Needs a microcontroller to initialize. 1.778 pin spacing. A quirky thing; the classic HA12058 or the Sony CX20187 are much more convenient (can't comment on sonics).<br>ICs with 1.778 mm pin spacing can be mounted on a 2.56-mm-spacing perfoards diagonally. Some twisting of pins required. Here, instead of twisting the IC, I used 26-pin strips from a DI... |
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Camera manufacturer | Canon |
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Camera model | Canon EOS REBEL SL1 |
Exposure time | 1/125 sec (0.008) |
F-number | f/8 |
ISO speed rating | 800 |
Date and time of data generation | 20:56, 6 November 2020 |
Lens focal length | 40 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | GIMP 2.8.16 |
File change date and time | 05:06, 14 November 2020 |
Exposure Program | Aperture priority |
Exif version | 2.3 |
Date and time of digitizing | 20:56, 6 November 2020 |
Meaning of each component |
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APEX shutter speed | 7 |
APEX aperture | 6 |
APEX exposure bias | −0.33333333333333 |
Subject distance | 0.45 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 |