Multi FREQ meter

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STD Multi FREQ meter

License: Public Domain

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Update time： 2023-07-24 20:30:41

Creation time： 2019-10-13 14:01:34

Description

1. For L/C meassure by LM311 and oscillation circuit. 2. For C meassure by 556N freq to C - range 1-1000 pF 3. For C meassure by 556N freq to C - range 1-1000 nF ![_multi freq meter V_01.jpg](//image.easyeda.com/pullimage/LE5jhwwmLY7m3t1lXZLQHihrnIdRh2kcUcPeu563.jpeg) ![multi freq meter V_01 cover.jpg](//image.easyeda.com/pullimage/RtFk5MDek4kZH9xpppnebklp0i1JiKv2dRVZxDfO.jpeg) ![multi freq meter V_01.jpg](//image.easyeda.com/pullimage/CB2kNHOXIYTl9CQQ1oLzAhwHrWaZCkaHZXpoOQQ9.jpeg)

Design Drawing

schematic diagram

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PCB

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Multi FREQ meter PCB
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	100nF	C5,C4,C3	1206	3
2	LM7805CT	U14	TO-220_HORIZONTAL	1
3	10u	C9	CASE-A_3216	1
4	100u	C2	CAP	1
5	1000u	C1	CAP-D13.0XF5.0	1
6	16x2 LCD (HD44780)	U4	LCD1602	1
7	74HC14EE	U12	DIP14	1
8	10k	PR3,PR2	HELITRIM 329Y	2
9	100uH	L2	AXIAL-0.4	1
10	10uH	L1	AXIAL-0.4	1
11	20MHz	X1	HC-49S	1
12	100n	C14,C27,C26,C25,C6	1206	5
13	220n	C28	1206	1
14	10n	C13,C12	1206	2
15	470nF	C10	RAD-0.1	1
16	1nF	C11	RAD-0.1	1
17	22p	C8,C7	1206	2
18	POWERSUPPLY_DC21MMX	G$1	POWERSUPPLY_DC-21MM	1
19	2W10	D1	BRIDGE-WOB	1
20	ISP	P1	HDR-IDC-2.54-2X3P	1
21	BC547	Q2,Q1	TO-92_MOLDED_NARROW	2
22	500	R17	1206	1
23	10K	R12,R11	1206	2
24	2k2	R10	1206	1
25	1k	R9,R7,R13	1206	3
26	100	R8	1206	1
27	1M	R6,R1	1206	2
28	10k	R5	1206	1
29	100k	R4,R3,R2	1206	3
30	SWITCH-MOMENTARYPTH	S2,S1	TACTILE-PTH	2
31	NE556N	U2	DIP-14	1
32	Header-Male-2.54_1x2	H5_FREQ,H4-1UF,H3-LC,H2-1NF,H1-L_GND	HDR-2X1/2.54	5
33	Listwa ARK2	U13,U6,U5	LISTWA ARK2	3
34	FREQ	U10	LISTWA ARK2	1
35	Cx_1uF	U9	LISTWA ARK2	1
36	Cx_1nF	U8	LISTWA ARK2	1
37	MEGA8-P	U3	DIP28-300	1
38	LM311N	U7	DIP8	1
39	74HC74	U11,U1	DIP14	2