Speaker protector

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STD Speaker protector

License: MIT

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Update time： 2022-04-23 04:12:27

Creation time： 2017-05-08 03:56:56

Description

This is a self made schematic for the Chineese speaker protection board "12-24V Dual Relay 7812+UPC1237 Speaker Protection Board Module DIY Kit For HIFI" [link][1] [1]: https://www.banggood.com/12-24V-Dual-Relay-7812UPC1237-Speaker-Protection-Board-Module-DIY-Kit-For-HIFI-p-1095260.html?rmmds=myorder

Design Drawing

schematic diagram

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Speaker protector
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PCB

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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	10u	C1	CAP-D3.0XF1.5	1
2	47u	C2,C3	CAP-D3.0XF1.5	2
3	100u	C4,C5	CAP-D3.0XF1.5	2
4	1N4007	D1,D2	DO-41	2
5	204-10UYC/S530-A3	LED1	LED-3MM/2.54	1
6	10k	R1,R2	AXIAL-0.3	2
7	22k	R3	AXIAL-0.3	1
8	2k	R4	AXIAL-0.3	1
9	47k	R5,R6	AXIAL-0.3	2
10	SRD-12VDC-SL-C	RELAY1,RELAY2	RELAY-SL-SRD	2
11	SPEAKER	SP1,SP2	PCB_MOUNT_SPEAKER	2
12	UPC1237HA	U1	SIP8	1
13	LM7812EE	U2	TO220	1
14	Right	U3	ONE_O	1
15	Left	U4	ONE_O	1
16	DB107	UR1	DB107	1
17	SIN(0 24 50) AC 1 0	V1	HDR1X2	1