网上看到一套开源的LCR DIY解决方案，精度也比较高（0.05%） 500 PPM，当然开源度也是最好高的，是整体开源，含原理图，PCB，源代码，上位机。非常值得去DIY，当然这套价格也不便宜。外观漂亮，机壳制作的尺寸图都是公开的。

原件列表

Main circuit

Resistors

(default: SMD 0805 1%)

R1,R16,R17,R28 = 10Ohm

R2,R34 = 820kOhm

R3,R5,R11,R13 = 8.2kOhm

R4,R10,R47,R55,R56,R71,R72,R78,R81,R82,R94,R95 = 10kOhm

R6, R58, R59 = 1.8kOhm

R7,R100 = 5kOhm trimpot (Vishay-Sfernice TS53YJ502MR10)

R8, R60, R62 = 16kOhm

R9,R23,R25,R35,R38,R39,R41,R52,R68,R69,R70,R87,R88,R96 = 56Ohm

R12,R14 = 5.6 kOhm

R15,R97 = NC (not fitted)

R18 = 10kOhm 0.05% 10ppm (Panasonic ERA6ARW103V)

R19 = 1Ohm

R20 = 1kOhm 0.05% 10 ppm (Panasonic ERA6ARW102V)

R21 = 100Ohm 0.05% 5ppm (Vishay-Dale TNPU0805100RAZEN00)

R22 = 100kOhm 0.05% 10ppm (Panasonic ERA6ARW104V)

R24,R26,R27,R29,R33,R36,R37,R40,R44,R57,R64 = 100Ohm

R30,R61,R76,R77,R80,R101 = 20kOhm

R31 = 750Ohm

R32,R42,R49,R66,R93 = 100kOhm

R43,R84,R85,R86,R89 = 2.2Ohm

R45,R73 = 39kOhm

R46,R90,R91 = 680Ohm

R48,R51,R74 = 4.7kOhm

R50 = 0Ohm

R53,R65 = 470Ohm

R54 = 1kOhm

R63,R98 = 1.6kOhm

R67 = 62Ohm

R75 = 5kOhm trimpot (Bourns 3266W-1-502LF)

R79 = 4.3kOhm

R81 = 7.5kOhm

R83 = 30kOhm

R92 = 430Ohm

R99 = 2kOhm

Capacitors

(default: SMD 0805)

C1,C2,C4,C10,C11,C12,C20,C26,C27, C28,C29,C31,C33,C34,C35,C36, C37,C40,C41,C43,C44,C45,C46, C47,C48,C49,C50,C51,C53,C54, C61,C63,C65,C78,C80,C86,C87,C88 = 100nF 10% X7R 25V

C3,C9,C62,C64,C90 = 1µF 10% 25 V X7R

C5,C13,C18 = 15nF 5% 50V NP0, SMD 1206

C6, C7, C14, C15, C16, C56 = 47nF 5% 50V NP0, SMD 1206

C8, C73, C89 = 1nF 5% 50V NP0

C17,C21,C23,C55,C60 = NC (not fitted)

C19,C25 = 150pF 5% 50V NPO

C22,C52,C58,C59 = 1.5nF 5% 50V NPO

C24,C32,C69,C72,C74,C75,C81,C85 = 2.2µF 10% 16V X7R

C30,C57 = 4.7nF 5% 50V NP0

C38,C39,C83,C84 = 33pF 5% NP0

C42,C70 = 33µF 6.3V, tantalum case A (Vishay Sprague 293D336X96R3A2TE3)

C66,C71, C82 = 10nF 10% 50V X7R

C67,C77, C79 = 4.7µF 10% 10V X5R

C68,C76 = 470µF 6.3 V tantalum case D (Kemet T495D477K006ATE100)

Inductors

L1 = 20µH dual coupled (Bourns PM3602-20-RC)

L2, L3 = ferrite bead, SMD 0805 (Murata BLM21PG221SN1D)

Semiconductors

(default: SMD)

D1,D2,D3,D4,D5 = BAV199 (SOT23)

D6 = LED, green, 3mm, leaded, horizontal mounting (Dialight 551-0207F)

D7 = MBR0520 (SOD123)

D8, D9 = LED, red, SMD 0805 (e.g. Kingbright KP-2012SURC)

D10 = BAT54A (SOT23)

U1 = OPA725AIDBV (SOT23-5) (TI)

U2 = MAX7404CSA (SOIC-8) (Maxim)

U3 = 74HCT4052D (SOIC-16)

U4, U20 = TLC2274AID (SOIC-14 (TI)

U5 = INA128U (SOIC-8) (TI)

U6,U11,U14 = OPA365DBV (SOT23-5) (TI)

U7 = PGA103U (SOIC-8) (TI)

U8 = 74HCT4053D (SOIC-16)

U9 = C8051F061-GQ (TQFP-64) (Silicon Laboratories)

U10 = LM4040D25IDBZ (SOT23) (TI)

U12 = DAC8811CDGK (MSOP-8) (TI)

U13 = SN74LVC2G53DCT (SM-8) (TI)

U15 = REG102GA-A (SOT223-5) (TI)

U16 = LT1611CS5 (SOT23-5) (Linear Technologies)

U17 = TPS72325DBV (SOT23-5) (TI)

U18 = TLV70030DDC (SOT23-5) (TI)

U19 = FT232RL (SSOP-28) (FTDI)

Miscellaneous

Y1 = 24MHz quartz crystal, fundamental resonance (e.g. Euroquartz 24.000MHz HC49/4H/30/50/40+85/18pF/ATF)

SW1 = rocker switch (RS Components 4US1R1020M6RNS, code 734-6934)

J1,J2,J3,J6,J7,J8,J17,J21,J22 = 2-pin pinheader, 0.1’’ pitch (2.54mm)

J4,J5,J14 = 1-pin pinheader, bent (see text)

J10,J11, J12,J13 = BNC socket, horizontal mounting, isolated (e.g. TE Connectivity 1-1337543-0)

J15 = 10-pin pinheader HE10 (e.g. Multicomp MC9A12-1034)

J16 = 14-pin pinheader HE10 (e.g. Multicomp MC9A12-1434)

J17 = 2-pin pinheader, 0.1’’ (2.54 mm), bent (see text)

J19 = USB connector, type B, horizontal (e.g. TE Connectivity 292304-1)

K1 = pushbutton (Omron B3F-10xx series)

PCB, bare, # 110758-1

alternatively, preassembled module # 110758-91

Case (Hammond 1455L1601 + machining + lettering)

Screws, nuts, spacers, misc. hardware

COMPONENT LIST

Display / Keyboard module

Resistors

(SMD 0805 1%)

R1,R2,R3,R4,R10,R11 = 4.7kOhm

R5,R6,R7,R9 = 56Ohm

R8 = 1kOhm

Capacitors

(SMD 0805)

C1,C2,C3,C4,C5,C6,C7,C8,C9,C10 = 1µF 10% 25V X7R

Semiconductors 

D1,D2,D3,D4 = BAT54A (SOT23)

D5 = LED, green, 3mm, leaded, (e.g. Kingbright L-424GDT)

Q1,Q2 = N-channel MOSFET (SOT23) (e.g. Fairchild FDV303N)

Miscellaneous

U1 = 64128M-FC-BW-3 graphic display (Displaytech)

J1 = 14-way HE10 transition header, max. height 5.4mm (Harting 09 18 114 9622)

K1,K2,K3,K4,K5 = pushbutton (Multicomp TS0B22)

14-way flatcable connector (e.g. Multicomp MC6FD014-30P1)

14-way flatcable, length (4 in. / 10cm) (3M 3365-14)

PCB, bare, Elektor #110758-2

Alternatively, preassembled module, Elektor # 110758-92

链接: https://pan.baidu.com/s/1bpaS8SB 密码: 隐藏内容,回复可看