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earlynerd·ELRS-haptics·hardware/main/main.kicad_pcb

Main PCB layout, top view — open source ESP32 board by earlynerd

About the Main PCB

Main is an open source ESP32 PCB design by earlynerd, published on GitHub. It is a 4-layer board measuring 20 × 46 mm, with 47 components from 28 distinct parts.

Its main chip is the ESP32-C6-MINI-1, from the ESP32 family. Other key parts include the BQ25186DLHR, TPS63802DLAR, TPD2EUSB30DRTR and TPS22918DBVR. By type, the board carries 22 resistors, 13 capacitors, 6 ICs, 2 connectors, 1 transistor and 1 switch.

From the project

Open main/main.kicadpro and satellite/satellite.kicadpro in KiCad 10.

Open main/main.kicadpro and satellite/satellite.kicadpro in KiCad 10.

- main/: one controller daughterboard PCBA; its haptic pod is a separate universal board. - satellite/: one universal PCBA, built eight times per wrist. JP1 selects normal or end-of-chain operation. - HapticBracelet.kicadsym, HapticBracelet.pretty/: shared libraries referenced by both projects. - panel/: future derived manufacturing panel, never the source for board edits. - verification/project-split/: current schematic PDFs, previews and check reports. - archive/combined-project/: superseded eight-island project…

Main components on the Main

ESP32-C6-MINI-1BQ25186DLHRTPS63802DLARTPD2EUSB30DRTRTPS22918DBVR

Main bill of materials (BOM)

47 components, 28 distinct parts.

QtyPartRefs
1
ESP32-C6-MINI-1
U1
1
BQ25186DLHR
BQ25186DLH
Texas Instruments
U11
1
TPS63802DLAR
TPS63802DLA
Texas Instruments
U12
2
TPD2EUSB30DRTR
TPD2EUSB30
Texas Instruments
U14, U15
1
TPS22918DBVR
TPS22918DBV
Texas Instruments
U26
1
2N7002
Q1
1
USB4105-GF-A
GCT
J2
1
STACK TO POD 0
J101
1
EVPAWBD4A
WAKE / SHIP
Panasonic
SW3
1
LTST-C19HE1WT
Lite-On
D1
1
DFE201612E-R47M=P2
0.47uH
Murata
L1
3
1u
C1, C41, C43
1
100n
C2
1
10u
C3
3
1u 10V
C32, C34, C36
2
10u 10V
C35, C37
2
22u 10V
C38, C39
1
4.7n 25V
C42
2
4.7k
R1, R2
5
10k
R3, R4, R5, R37, R62
Show 8 more
QtyPartRefs
2
22
R24, R25
4
100k
R38, R39, R43, R45
1
511k 1%
R40
1
91k 1%
R41
1
33
R42
1
100
R46
3
2.2k
R47, R49, R51
2
5.1k 1%
R60, R61

Main design files

The KiCad project lives in the earlynerd/ELRS-haptics repository on GitHub; these links point at the commit this page was built from.

Main: common questions

What microcontroller does the Main use?

The Main is built around the ESP32-C6-MINI-1, from the ESP32 family.

How big is the Main PCB?

The Main measures 20 × 46 mm, has 4 copper layers and is 0.8 mm thick.

How many components are on the Main?

47 components, from 28 distinct parts. The full bill of materials is listed on this page.

Where can I download the Main design files?

From the earlynerd/ELRS-haptics repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Main design in my own project?

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

Can I test firmware for the Main 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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