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Hackaday.com Design
Challenge
Questions? Comments email me at
Scope
of Project:
This project is a stereo amplifier the size of a businesses card that can be connected to the headphone jack of any iPod or MP3 Player. The circuit is based on two LM386 power amplifiers two power a set of bookshelf speakers.
Skills
required:
Component identification
Soldering
Downloads:
Gerber Files:
Copper layer Gerber File, this file contains the copper tracks
Cutout layer File, this file contains the border cut out
Isolation Layer, this file contains the route trace around the copper traces
Drill layer Gerber File, this file contains the component holes. Note: there are 12 holes you need to drill out by hand, .0625 inches for the switch and the stereo jacks and .125 inches for the power jack
T-Tech ISOPRO file:
Hackaday.ISO , this file contains all layers for this board in T-Tech propitiatory file format in ISOPRO, Just incase some one has a T-Tech milling machine.
Traxmaker files by Microcode Engineering
Hackaday.PCB, this file contains all layers in Traxmaker file format.
Hackaday.GBL this file contains the copper tracks in Gerber file format. Note: this file does not contain an isolation file. You need to add one with your preferred software.
Hackaday.GDG this file contains the drill holes in Gerber file format
Hackaday.GM1 this file contains the cutout layer in Gerber file format. Note: in this layer the drill holes show up, you need to delete them with your preferred software.
Parts
List:
|
Qty |
Description |
Digikey Number |
Radio Shack Number |
|
1 |
PCB |
See files above |
See files above |
|
4 |
4.7 K Ohm resistors |
4.7KH-ND |
271-1330 |
|
1 |
510 Ohm resistor |
510H-ND |
271-1317 (470 Ohms) |
|
2 |
LM386N (5-18 VDC Supply) |
LM386N-4-ND |
276-1731 |
|
2 |
8 pin IC sockets |
ED3108-ND |
276-1995 |
|
2 |
1000 uF Electrolytic capacitors |
P5169-ND |
272-1032 |
|
1 |
.1 uF capacitor |
478-3193-ND |
272-135 |
|
1 |
22 uF Electrolytic capacitor |
604-1062-ND |
272-1026 |
|
1 |
Blue LED |
L62206CT-ND |
276-311 |
|
2 |
3.5mm Stereo Jack |
CP1-3513-ND |
274-249 * |
|
1 |
5.5mm x 2.5mm DC Power Jack Switchcraft 760 series |
SC1152-ND |
274-1582 * |
|
1 |
SPDT Switch |
EG2352-ND |
275-613 * |
|
1 |
Regulated DC power wall wart (12VDC or 9VDC @ 500mA Min) |
N/A |
273-1667 |
|
1 |
3.5mm to 3.5mm Dubbing Cable |
N/A |
55020890 |
|
1 |
3.5mm to RCA cable |
N/A |
55020953 |
* Pin out may vary
Assembly
Manual:
Finished PCB Copper Side
Finished PCB Component side
Step
1:
Install R1 4.7K ohm resistor and solder
Make sure you bend the lead of the resistor so that I doesn�t fall out when you solder
Step
2:
Install R2 4.7K ohm resistor and solder
Install R3 4.7K ohm resistor and solder
Install R4 4.7K ohm resistor and solder
Install R5 510 ohm resistor and solder
Install C1 .1 uF capacitor
Install IC1 8 Pin Socket, Note: Pin 1 points toward hackaday.com text
Install IC2 8 Pin Socket, Note: Pin 1 points toward hackaday.com text
Install Output 3.5 Stereo Jack
Install Input 3.5 Stereo Jack
Install 5.5mm DC Power Jack
Install both 1000 uF capacitors, note Negative lead points toward DC jack
Install Blue Led, Note: The flat side (cathode) faces towards the 1000 uF capacitors
Install the 22 uF electrolytic capacitor, Note Negative lead faces the 4.7K ohm Resistors
Install the SPDT Switch
Insert the LM386 IC in the Sockets, be sure to line up pin 1. Note the dot in the upper left hand side.
Hooks up and test, plug in you wall wart and insert it the DC jack the led should light when the switch in the up position
Step
18
Test the whole project, hook up your speaker and iPod and test. The output jack is on the top and is labeled on the copper side of your PCB. The input jack is on the bottom and is labeled on the copper side of your PCB.
