Diagrams
- Circuit Diagram
- PCB Artwork
- PCB Component Layout
- Interwiring Diagram
- Equipment Wiring Diagram
- Room Layout
Zip Files
Tips
The MN3004 and MN3101 ICs are believed to be obsolete.
I have been advised that they are currently available from "DigiKey" - see www.digikey.com for more information. It appears that you have to buy in lots of 25 devices, and the price is not quoted...
Parts List
|
RESISTORS (All 1/4 watt 5% or better) |
|
| R1,2,3,4,8,10,11,17,19,20 | 22K |
| R5 | 220K |
| R6 | 180K |
| R7,13,14 | 100K |
| R9,18 | 1K0 |
| R12 | 68K |
| R15,16 | 4K7 |
|
POTENTIOMETERS (Miniature, PCB Mounting) |
|
| RV1 | 100K LIN |
| RV2 | 10K LOG |
|
CERAMIC CAPACITORS (0.2" Pitch) |
|
| C1,2 | 220n |
| C3,4,8,9 | 4n7 |
| C5,10 | 2n2 |
| C6 | 220p |
| C11 | 10n |
| C14,15 | 100n |
|
ELECTROLYTIC CAPACITORS (Radial) |
|
| C7 | 10u 25V |
| C12 | 1u0 25V |
| C13 | 470u 35V |
| C16 | 100u 25V |
|
INTEGRATED CIRCUITS |
|
| IC1 | LM324 |
| IC2 | MN3101 |
| IC3 | MN3004 |
| IC4 | 78L15 |
|
DIODES |
|
| D1 | 1N4148 |
| D2,3 | 1N4001 |
|
MISCELLANEOUS |
|
| P1-9 | Terminal Pin |
| SW1 | DPDT Rocker Switch |
| SK1,2,3 | Phono Socket (or as required) |
| T1 | 240 to 15-0-15 100mA |
IC Sockets (1x8 way and 2x14 way), Case, Knobs for RV1 & RV2, Mains Flex, Screened Cable, Sleeving, Fixings for T1, Solder Tag, Grommet or Cable Clamp, 13A Plug with 3A Fuse, Audio Connection Leads as Required.
Acknowledgements
Dolby, Dolby Stereo, Dolby Surround and the Double-D Symbol are trademarks of Dolby Laboratories Licensing Corporation. This project is based on generally available information and to the best of the authors knowledge does not infringe any of Dolby's patents.
All other trademarks acknowledged.
Some aspects of this project are based on information from an article by Robert Ball in Electronics - The Maplin Magazine, Issue Number 37.
This project, including all text, images and diagrams, is copyright 1991 - 2003 Paul Stenning. No part of this article may be reproduced in any form without prior written permission from Paul Stenning and WallyWare, inc. All details are believed to be accurate, but no liability can be accepted for any errors.
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