LM3915 + 555 TIMER VU-METER

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STD LM3915 + 555 TIMER VU-METER

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Update time： 2020-03-21 12:55:46

Creation time： 2018-11-28 18:54:02

Description

JUST A SIMPLE STEREO VU-METER USING THE LM3915 IN COMBINATION WITH A 555 WITCH WILL BE CONFIGURED AS A BYSTABLE MULTY VIBRATOR . THE PORPOUSE OF THE 555 TIMEWILL BE TO BE ABLE TO CHARGE THE LED MODE FROM BAR TO DOT MODE

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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity	Mounted
1	LM3915	U1,U2	DIP18	2	Yes
2	220R	R1,R2	AXIAL-0.3	2	Yes
3	2.2k	R3	AXIAL-0.3	1	Yes
4	2.2K	R4	AXIAL-0.3	1	Yes
5	LED-3MM	LED1,LED2,LED3,LED4,LED5,LED6,LED7,LED8,LED9,LED10,LED11,LED12,LED13,LED14,LED15,LED16,LED17,LED18,LED19,LED20	LED-3MM/2.54	20	Yes	C99772
6	AUDIO SIGNAL IN	P1	HDR-3X1/2.54	1	Yes	C49257
7	10K	R5,R6	RES-ADJ_3386P	2	Yes	C125022
8	NE555P	U3	DIP-8	1	Yes	C46749
9	10nF	C3	RAD-0.1	1	Yes
10	470R	R7	AXIAL-0.3	1	Yes
11	BC547 - NPN	Q1	TO-92(TO-92-3)	1	Yes	C2092
12	SRD-03VDC-SL-C	RELAY1	RELAY-SL-SRD	1	Yes	C24585
13	1N4007	D1,D2,D3,D4,D5,D6,D7	DO-35	7	Yes	C54037
14	50V 0.1uF	C4	CAP-D3.0XF1.5	1	Yes
15	1k	R9,R16,R18,R19	AXIAL-0.3	4	Yes
16	100k	R10	AXIAL-0.3	1	Yes
17	10k	R11,R12	AXIAL-0.3	2	Yes
18	EVQ22705R	SW1	KEY-6.0*6.0-4	1	Yes	C79156
19	1u	C5,C1,C6	CAP-D3.0XF1.5	3	Yes
20	BC547	Q3,Q2	TO-92(TO-92-3)	2	Yes	C2092
21	8.2k	R8,R14	AXIAL-0.4	2	Yes
22	300k	R13,R15	AXIAL-0.4	2	Yes
23	10uF	C2,C7	CAP-D3.0XF1.5	2	Yes
24	0.47 uF (474)	C8,C9	CAP-D3.0XF1.5	2	Yes
25	200k	R17	AXIAL-0.3	1	Yes