HardLabs

Multimeter

MadsRudolph·personal-projects·Projects/DTU Multimeter/KiCad/Multimeter/Multimeter.kicad_pcb

Multimeter PCB layout, top view — open source AVR/Arduino board by MadsRudolph

About the Multimeter PCB

Multimeter is an open source AVR/Arduino PCB design by MadsRudolph, published on GitHub. It is a 2-layer board measuring 688 × 275.9 mm, with 62 components from 48 distinct parts.

Its main chip is the Arduino Mega, from the AVR/Arduino family. Other key parts include the MCP3208-CI/P, LM7812, CD4053BE, LM358P and LM311N. By type, the board carries 29 resistors, 8 ICs, 8 capacitors, 4 switches, 4 diodes and 2 connectors.

It belongs with the audio, iot & wireless and test & measurement designs in this gallery.

From the project

A collection of hardware projects focusing on audio, electronics, and 3D printing. Built and documented using Obsidian.

A collection of hardware projects focusing on audio, electronics, and 3D printing. Built and documented using Obsidian.

Desktop app for cataloging THT electronic components with a built-in DTU shop browser. Track your parts, visualize resistor color bands, browse 1,400+ shop items, and see what you already own.

Key Features: - Dashboard with donut chart and stats - Inventory with search, category filter, and visual resistor color bands - DTU Shop Browser — browse/search/filter shop components, ownership cross-referencing - AI Export — markdown summary for LLM-assisted project planning -…

Main components on the Multimeter

MCP3208-CI/PLM7812CD4053BELM358PLM311NNE555PLM35DZDS1307+Arduino Mega

Multimeter bill of materials (BOM)

62 components, 48 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP3208-CI/P
MCP3208-CI_P
U1
1
LM7812
CD74HC4067E
U2
1
CD4053BE
U3
1
LM358P
U4
1
LM311N
U5
1
NE555P
U6
1
LM35DZ
U7
1
DS1307+
U8
1
Arduino Mega
A1
1
32.768kHz
Y1
2
Conn_01x01_Pin
J1, J2
1
CR2032
BT1
1
Piezo
BZ1
1
10A
F1
1
500mA
F2
1
MODE
SW1
1
FUNC
SW2
1
RANGE
SW3
1
SELECT
SW4
1
OLED_128X64_1.3_I2C
DS1
Show 28 more
QtyPartRefs
1
Red
D1
1
Green
D2
1
Yellow
D3
1
1N4148
D4
5
100n
C1, C2, C3, C7, C8
3
10u
C4, C5, C6
1
50.15
R1
1
8K25
497
R2
1
10K
4990
R3
1
10K
48.536k
R4
1
100R
498k
R5
1
100R
4.755M
R6
1
10R
10.06M
R7
1
10K
10.03M
R8
1
10K
10k
R9
1
4K7
998
R10
1
4K7
99.49
R11
1
10.04
R12
1
1.05
R13
1
0.145
R14
1
1.002M
R15
1
100k
R16
1
1.003M
R17
6
10k
R18, R22, R23, R24, R28, R29
1
99.48
R19
1
9.09k
R20
1
1k
R21
3
330
R25, R26, R27

Multimeter design files

The KiCad project lives in the MadsRudolph/personal-projects repository on GitHub; these links point at the commit this page was built from.

Multimeter: common questions

What microcontroller does the Multimeter use?

The Multimeter is built around the Arduino Mega, from the AVR/Arduino family.

How big is the Multimeter PCB?

The Multimeter measures 688 × 275.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Multimeter?

62 components, from 48 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Multimeter design files?

From the MadsRudolph/personal-projects repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Multimeter design in my own project?

The repository has no license, so all rights stay with MadsRudolph. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Multimeter without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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