LM339 VU Meter

Ongoing

STD LM339 VU Meter

License:

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Editors' pick

Update time： 2020-07-04 05:37:12

Creation time： 2019-02-01 21:55:11

Description

Another attempt at a good VU/power meter WITHOUT using an Microcontroller.

Design Drawing

schematic diagram

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PCB

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BOM

ID	Name	Designator	Footprint	Quantity
1	Header-Female-2.54_1x2	P3	HDR-1X2/2.54	1
2	1N4148	D2,D1	DO-35	2
3	1uF	C2,C1	CAP-D5.0XF2.0	2
4	Header-Male-2.54_1x3	H1	HDR-TH_3P-P2.54-V	1
5	100uF	C4	CAP-D10.0XF5.0	1
6	L7805ABV	U5	TO-252-3_3PIN-L6.85-W6.70-PITCH2.40-L	1
7	0.1uF	C3	RAD-0.1	1
8	10K	R37,R18	RES-ADJ_CT-94EW	2
9	3K	R29,R10	AXIAL-0.3	2
10	1k	R17,R6,R5,R4,R8,R13,R20,R21,R3,R23,R24,R25,R26,R27,R7,R32,R36,R2,R1,R22	AXIAL-0.3	20
11	100K	R19,R38	AXIAL-0.3	2
12	18K	R9,R28	AXIAL-0.3	2
13	2.2K	R11,R30	AXIAL-0.3	2
14	1.6K	R12,R31	AXIAL-0.3	2
15	820	R14,R33	AXIAL-0.3	2
16	620	R15,R34	AXIAL-0.3	2
17	390	R35,R16	AXIAL-0.3	2
18	LED-3MM	LED15,LED16,LED9,LED8,LED10,LED11,LED12,LED6,LED13,LED5,LED14,LED4,LED3,LED2,LED1,LED7	LED-3MM/2.54	16
19	LM339N	U4,U2,U3,U1	DIP-14	4