Audio System - Revision history

Adamcolton: /* Integrated */

2018-08-08T16:53:24Z

Integrated

← Older revision		Revision as of 16:53, 8 August 2018
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	== Integrated ==		== Integrated ==
	Has 2 50W channels. Probably plenty and simplifies the project.		Has 2 50W channels. Probably plenty and simplifies the project. Get one with an audio jack too.

	== Structure ==		== Structure ==

Adamcolton at 16:46, 8 August 2018

2018-08-08T16:46:57Z

← Older revision		Revision as of 16:46, 8 August 2018
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	This would be a fun build		This would be a fun build

	* ~~Bluetooth receiver module:~~		* 4x Audio Exciter : https://www.parts-express.com/dayton-audio-daex25fhe-4-framed-high-efficiency-25mm-exciter-24w-4-ohm--295-224
	* 2 x Audio Amplifier Module
	* 2 or 4 x Audio Exciter : https://www.parts-express.com/dayton-audio-daex25fhe-4-framed-high-efficiency-25mm-exciter-24w-4-ohm--295-224

	Put the electronics in a box, the speakers are based on [https://www.youtube.com/watch?v=zdkyGDqU7xA this] so 2 or 4 speaker panels.		Put the electronics in a box, the speakers are based on [https://www.youtube.com/watch?v=zdkyGDqU7xA this] so 2 or 4 speaker panels.
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	https://www.parts-express.com/resources-buyers-guide-exciters		https://www.parts-express.com/resources-buyers-guide-exciters

	~~== Separate Receiver ==~~
	* https://www.youtube.com/watch?v=9Apn7_QybNo
	* Needs separate amps

	== Integrated ==		== Integrated ==
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	I really don't want a cord (always) hanging down, so I think I'll add batteries. I need a BMS board and some cells. Probably a 2x4 arrangement. However, the BMS systems can draw a lot of power, so I'll need to add a current draw limit and take the voltage drop of that into account. Though that may be overthinking it. I may be able to just drop in a current limit resistor. At 12.6V, 2A would flow across just 6.3Ω. So a 5V high current resistor should work.		I really don't want a cord (always) hanging down, so I think I'll add batteries. I need a BMS board and some cells. Probably a 2x4 arrangement. However, the BMS systems can draw a lot of power, so I'll need to add a current draw limit and take the voltage drop of that into account. Though that may be overthinking it. I may be able to just drop in a current limit resistor. At 12.6V, 2A would flow across just 6.3Ω. So a 5V high current resistor should work.

			== BOM ==

			* Bluetooth Audio Module: $9
			* Exciter 4x$8.25 = $33
	* Batteries: $10		* Batteries: $10
	* BMS : $7		* BMS : $7
	* Charger: $7		* Charger: $7
			* Fiber glass $8
			* Epoxy $20
			* Veneer $20

			$114 for parts

Adamcolton: /* Power */

2018-08-07T23:11:15Z

Power

← Older revision		Revision as of 23:11, 7 August 2018
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	== Power ==		== Power ==
	I really don't want a cord (always) hanging down, so I think I'll add batteries. I need a BMS board and some cells. Probably a 2x4 arrangement. However, the BMS systems can draw a lot of power, so I'll need to add a current draw limit and take the voltage drop of that into account.		I really don't want a cord (always) hanging down, so I think I'll add batteries. I need a BMS board and some cells. Probably a 2x4 arrangement. However, the BMS systems can draw a lot of power, so I'll need to add a current draw limit and take the voltage drop of that into account. Though that may be overthinking it. I may be able to just drop in a current limit resistor. At 12.6V, 2A would flow across just 6.3Ω. So a 5V high current resistor should work.

	* Batteries: $10		* Batteries: $10
	* BMS : $7		* BMS : $7
	* Charger: $7		* Charger: $7

Adamcolton at 23:04, 7 August 2018

2018-08-07T23:04:49Z

← Older revision		Revision as of 23:04, 7 August 2018
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	Another approach could be to make thin wood veener and epoxy it to fiberglass. This will give it a clean wood look, but with the rigidity of a composite material. https://www.amazon.com/Bondo-20128-Fiberglass-Cloth-sq/dp/B002JRGOT8/ and as much as it goes against my taste, just buy some veneer https://www.veneersupplies.com/categories/Raw__Wood__Veneer/Bargain__Bin/		Another approach could be to make thin wood veener and epoxy it to fiberglass. This will give it a clean wood look, but with the rigidity of a composite material. https://www.amazon.com/Bondo-20128-Fiberglass-Cloth-sq/dp/B002JRGOT8/ and as much as it goes against my taste, just buy some veneer https://www.veneersupplies.com/categories/Raw__Wood__Veneer/Bargain__Bin/

			== Power ==
			I really don't want a cord (always) hanging down, so I think I'll add batteries. I need a BMS board and some cells. Probably a 2x4 arrangement. However, the BMS systems can draw a lot of power, so I'll need to add a current draw limit and take the voltage drop of that into account.

			* Batteries: $10
			* BMS : $7
			* Charger: $7

Adamcolton: /* Structure */

2018-08-07T21:14:20Z

Structure

← Older revision		Revision as of 21:14, 7 August 2018
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	It looks like the speaker will be made of thin spruce, Maple could also work. I'm not quite sure how to do that, but my gut reaction is to make my own 2ply sheet. Cut thin strips of ply and glue them up so that one layer runs perpendicular to the other. I think I'm shooting for less than 1/8th inch, so I'd probably cut the veneer to just under that and sand it down after the glue up.		It looks like the speaker will be made of thin spruce, Maple could also work. I'm not quite sure how to do that, but my gut reaction is to make my own 2ply sheet. Cut thin strips of ply and glue them up so that one layer runs perpendicular to the other. I think I'm shooting for less than 1/8th inch, so I'd probably cut the veneer to just under that and sand it down after the glue up.

	Another approach could be to make thin wood veener and epoxy it to fiberglass. This will give it a clean wood look, but with the rigidity of a composite material. https://www.amazon.com/Bondo-20128-Fiberglass-Cloth-sq/dp/B002JRGOT8/		Another approach could be to make thin wood veener and epoxy it to fiberglass. This will give it a clean wood look, but with the rigidity of a composite material. https://www.amazon.com/Bondo-20128-Fiberglass-Cloth-sq/dp/B002JRGOT8/ and as much as it goes against my taste, just buy some veneer https://www.veneersupplies.com/categories/Raw__Wood__Veneer/Bargain__Bin/

Adamcolton at 20:45, 7 August 2018

2018-08-07T20:45:30Z

← Older revision		Revision as of 20:45, 7 August 2018
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	Put the electronics in a box, the speakers are based on [https://www.youtube.com/watch?v=zdkyGDqU7xA this] so 2 or 4 speaker panels.		Put the electronics in a box, the speakers are based on [https://www.youtube.com/watch?v=zdkyGDqU7xA this] so 2 or 4 speaker panels.

			https://www.parts-express.com/resources-buyers-guide-exciters

	== Separate Receiver ==		== Separate Receiver ==

Adamcolton at 20:41, 7 August 2018

2018-08-07T20:41:40Z

← Older revision		Revision as of 20:41, 7 August 2018
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	It looks like the speaker will be made of thin spruce, Maple could also work. I'm not quite sure how to do that, but my gut reaction is to make my own 2ply sheet. Cut thin strips of ply and glue them up so that one layer runs perpendicular to the other. I think I'm shooting for less than 1/8th inch, so I'd probably cut the veneer to just under that and sand it down after the glue up.		It looks like the speaker will be made of thin spruce, Maple could also work. I'm not quite sure how to do that, but my gut reaction is to make my own 2ply sheet. Cut thin strips of ply and glue them up so that one layer runs perpendicular to the other. I think I'm shooting for less than 1/8th inch, so I'd probably cut the veneer to just under that and sand it down after the glue up.

			Another approach could be to make thin wood veener and epoxy it to fiberglass. This will give it a clean wood look, but with the rigidity of a composite material. https://www.amazon.com/Bondo-20128-Fiberglass-Cloth-sq/dp/B002JRGOT8/

Adamcolton at 20:27, 7 August 2018

2018-08-07T20:27:16Z

← Older revision		Revision as of 20:27, 7 August 2018
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	I'd like to do it as one sheet with the speakers spaced meaningfully across. But it may make more sense to do it as either 2 or 4 pieces.		I'd like to do it as one sheet with the speakers spaced meaningfully across. But it may make more sense to do it as either 2 or 4 pieces.

	It looks like the speaker will be made of thin spruce, Maple could also work. I'm not quite sure how to do that, but my gut reaction is to make my own 2ply sheet. Cut thin strips of ply and glue them up so that one layer runs perpendicular to the other.		It looks like the speaker will be made of thin spruce, Maple could also work. I'm not quite sure how to do that, but my gut reaction is to make my own 2ply sheet. Cut thin strips of ply and glue them up so that one layer runs perpendicular to the other. I think I'm shooting for less than 1/8th inch, so I'd probably cut the veneer to just under that and sand it down after the glue up.

Adamcolton at 20:23, 7 August 2018

2018-08-07T20:23:27Z

← Older revision		Revision as of 20:23, 7 August 2018
Line 19:		Line 19:
	I'd like to do it as one sheet with the speakers spaced meaningfully across. But it may make more sense to do it as either 2 or 4 pieces.		I'd like to do it as one sheet with the speakers spaced meaningfully across. But it may make more sense to do it as either 2 or 4 pieces.

	It looks like the speaker will be made of thin spruce. I'm not quite sure how to do that, but my gut reaction is to make my own 2ply sheet. Cut thin strips of ply and glue them up so that one layer runs perpendicular to the other.		It looks like the speaker will be made of thin spruce, Maple could also work. I'm not quite sure how to do that, but my gut reaction is to make my own 2ply sheet. Cut thin strips of ply and glue them up so that one layer runs perpendicular to the other.

Adamcolton at 20:22, 7 August 2018

2018-08-07T20:22:57Z

← Older revision		Revision as of 20:22, 7 August 2018
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	== Integrated ==		== Integrated ==
	Has 2 50W channels. Probably plenty and simplifies the project.		Has 2 50W channels. Probably plenty and simplifies the project.

			== Structure ==
			Regardless of the other details this is going to have a base and the speakers. The base will mount the electronics but it also provides support for the speakers which are suspended.

			I'd like to do it as one sheet with the speakers spaced meaningfully across. But it may make more sense to do it as either 2 or 4 pieces.

			It looks like the speaker will be made of thin spruce. I'm not quite sure how to do that, but my gut reaction is to make my own 2ply sheet. Cut thin strips of ply and glue them up so that one layer runs perpendicular to the other.