HardLabs

EsperDNS

zachmorr·esper·hardware/product/usb-programmable/EsperDNS.kicad_pcb

EsperDNS PCB layout, top view — open source ESP32 board by zachmorr

About the EsperDNS PCB

EsperDNS is an open source ESP32 PCB design by zachmorr, published on GitHub under the MIT license. It is a 4-layer board measuring 51 × 48 mm, with 58 components from 22 distinct parts.

Its main chip is the ESP32-WROOM-32E, from the ESP32 family. Other key parts include the AZ1117EH-3.3TRG1, CP2102-GMR_NRND and DP83848C. By type, the board carries 29 resistors, 14 capacitors, 5 transistors, 4 ICs, 2 connectors and 2 diodes.

From the project

Ad Blocking with an ESP32

All Esper hardware is designed to be as easy to modify and manufacture as possible. For the most part this means using free, open-source tools and simplifying the design to have the smallest DOM possible.

KiCAD is used for all PCB design since it is free and has a large community support.

The Esper device is designed to be manufactured and assembled at JLCPCB. At low quantities (5-10 boards), no other board house comes close on price and ease of use.

EsperDNS, from the project README
From the project README

Main components on the EsperDNS

AZ1117EH-3.3TRG1ESP32-WROOM-32ECP2102-GMR_NRNDDP83848C

EsperDNS bill of materials (BOM)

58 components, 22 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
AZ1117EH-3.3TRG1
U1
1
ESP32-WROOM-32E
U2
1
CP2102-GMR_NRND
U4
1
DP83848C
U5
5
2N7002
Q1, Q2, Q3, Q4, Q5
1
USB_B_Micro
J1
1
RJ45_AMPHENOL_RJMG1BD3B8K1ANR
RJ45_Amphenol_RJMG1BD3B8K1ANR
J3
1
PTS645VH83-2 LFS
SW1
1
C72043
GRN
D1
1
RS-3535MWAR
D2
1
C1015
Ferrite_Bead
FB2
3
1UF
1uF
C1, C4, C12
8
0.1UF
0.1uF
C2, C5, C6, C7, C11, C13, C14, C16
3
10UF
10uF
C3, C10, C15
1
470
R1
2
10K
R2, R8
2
47
R3, R4
1
82
R5
11
49.9
R6, R7, R9, R13, R14, R15, R16, R18 +3
9
2.2K
2.2k
R10, R12, R21, R23, R24, R25, R26, R27 +1
Show 2 more
QtyPartRefs
2
270
R11, R17
1
4.87
R29

EsperDNS design files

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

EsperDNS: common questions

What microcontroller does the EsperDNS use?

The EsperDNS is built around the ESP32-WROOM-32E, from the ESP32 family.

How big is the EsperDNS PCB?

The EsperDNS measures 51 × 48 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the EsperDNS?

58 components, from 22 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 EsperDNS design files?

From the zachmorr/esper repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the EsperDNS design in my own project?

Yes, under the terms of its MIT license, which zachmorr chose for the repository.

Can I test firmware for the EsperDNS 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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