HardLabs

Dmmx16

MoominByte·dmmx16

Dmmx16 PCB layout, top view — open source ESP32 board by MoominByte

About the Dmmx16 PCB

Dmmx16 is an open source ESP32 PCB design by MoominByte, published on GitHub. It is a 4-layer board measuring 220 × 110 mm, with 113 components from 21 distinct parts.

Its main chip is the XIAO ESP32-C6 / 113991254, from the ESP32 family. Other key parts include the SN74HC595PWR. By type, the board carries 37 resistors, 18 transistors, 18 diodes, 17 relays, 12 connectors and 5 fuses.

It belongs with the test & measurement designs in this gallery.

From the project

BenchScan DMMX16 is a digital multimeter switching card inspired by the functional architecture of the SIGLENT SC1016. It provides 16 measurement channels: 12 multipurpose channels and 4 fuse-protected current channels.

BenchScan DMMX16 is a digital multimeter switching card inspired by the functional architecture of the SIGLENT SC1016. It provides 16 measurement channels: 12 multipurpose channels and 4 fuse-protected current channels.

- Schematic revision: DRAFT-1 - File format: KiCad 10 - Hierarchical schematic converted and saved - ERC: 0 errors and 18 off-grid warnings from the custom MOSFET symbols - PCB: 220 × 110 mm, four copper layers, with all 113 footprints placed on the top side - Preliminary placement completed; routing and manufacturing files have not started

Main components on the Dmmx16

XIAO ESP32-C6 / 113991254SN74HC595PWR

Dmmx16 bill of materials (BOM)

113 components, 21 distinct parts.

QtyPartRefs
1
XIAO ESP32-C6 / 113991254
U1
2
SN74HC595PWR
U2, U3
17
2N7002K
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 +9
1
AO3401A
Q19
4
Phoenix 1190370 8POS
J1, J2, J3, J4
1
691137710006 DMM
J5
3
POMONA 73099 RED
J6, J9, J11
1
54-00129 BARREL 5V
J7
3
POMONA 73099 BLACK
J8, J10, J12
4
0451.500MRL 500mA
F1, F2, F3, F4
1
1812L150/12DR
F6
17
UD2-5NE
K1, K2, K3, K4, K5, K6, K7, K8 +9
17
1N4148W
D1, D2, D3, D4, D5, D6, D7, D8 +9
1
SMBJ5.0A
D19
2
100nF
C1, C2
1
47uF 10V
C7
17
100R
R1, R2, R3, R4, R5, R6, R7, R8 +9
17
47k
R18, R19, R20, R21, R22, R23, R24, R25 +9
1
10k
R39
1
100k
R42
Show 1 more
QtyPartRefs
1
0R LINK
R50

Dmmx16 design files

The KiCad project lives in the MoominByte/dmmx16 repository on GitHub; these links point at the commit this page was built from.

Dmmx16: common questions

What microcontroller does the Dmmx16 use?

The Dmmx16 is built around the XIAO ESP32-C6 / 113991254, from the ESP32 family.

How big is the Dmmx16 PCB?

The Dmmx16 measures 220 × 110 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Dmmx16?

113 components, from 21 distinct parts. The full bill of materials is listed on this page.

Where can I download the Dmmx16 design files?

From the MoominByte/dmmx16 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Dmmx16 design in my own project?

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

Can I test firmware for the Dmmx16 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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