MilliVoltmeterDIY LEAP#327

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STD MilliVoltmeterDIY LEAP#327

License: MIT

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Update time： 2021-04-08 04:22:23

Creation time： 2018-01-17 11:19:01

Description

An ATmega328-based millivolt meter based on a design by Scullcom Hobby Electronics. Uses an LTC2400 ADC and LT1019 voltage reference. I have fabricated the board at OSHPark, built and tested it - all OK! There are a few changes I'd make to the PCB if I did this again - mainly concerning more conventient connector placement. All the design notes (including code) are available at https://github.com/tardate/LittleArduinoProjects/tree/master/Equipment/MilliVoltmeterDIY/CustomBoardAndEnclosure

Design Drawing

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PCB

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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	ATMEGA328P-AU	U1	TQFP-32_7X7X08P	1
2	LT1019CS8-2.5PBF	U2	SOIC-8	1
3	LTC2400CS8PBF	U3	SOIC-8	1
4	100K	R1,R3	R0805	2
5	1M	R2	R0805	1
6	220K	R4	R0805	1
7	10K	R12,R11,R10,R8,R9	R0805	5
8	10uF	C1,C6	ELECTRO-SMD-A-3.8MM	2
9	100nF	C2,C7,C10	0805	3
10	10nF	C3,C8	0805	2
11	100uH	L1	0805	1
12	16MHZ	X1	OSC-49S-1	1
13	22pF	C4,C5	C0805	2
14	AMS1117-5.0	U7	SOT-223	1
15	Header-Female-2.54_1x2	P1,P4,P6	HDR-1X2/2.54	3
16	HDR-IDC-2.54-2X3P	P2	HDR-IDC-2.54-2X3P	1
17	10Ω	R5,R6	0805	2
18	1uF	C9	0805	1
19	220Ω	R7	0805	1
20	10K	PR1	RM065-V1	1
21	Header-Male-2.54_1x3	P3	HDR-3X1/2.54	1
22	Header-Female-2.54_1x10	P5	HDR-10X1/2.54	1
23	Header-Female-2.54_1x4	P7,P9	HDR-4X1/2.54	2
24	2.2uF	C9-ALT	CAP-D5.0XF2.0	1