HardLabs

DRM Watch v3

drfailov·DRM_Watch_v3·Board/KiCad Project/_DRM_Watch_v3/DRM_Watch_V3.kicad_pcb

DRM Watch v3 PCB layout, top view — open source ESP32 board by drfailov

About the DRM Watch v3 PCB

DRM Watch v3 is an open source ESP32 PCB design by drfailov, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 62.7 × 44.5 mm, with 68 components from 37 distinct parts.

Its main chip is the ESP32-S2FN4R2, from the ESP32 family. Other key parts include the ME6211 SOT23-5 3.3V, TP4056, DS3231S and Microchip HV857. By type, the board carries 23 resistors, 19 capacitors, 7 diodes, 5 ICs, 4 switches and 3 modules.

It belongs with the wearables, displays & leds and iot & wireless designs in this gallery.

From the project

DRM Watch 3 - Наручний годинник з дисплеєм SHARP Memory LCD

DRM Watch 3 - це мій саморобний наручний годинник, в основі якого лежить дисплей Sharp Memory LCD, ESP32-S2 і бажання носити це на руці:) Це НЕ "Smart годинник"! Цей пристрій по своїй функціональності близький до звичайного електронного годинника, з кількома додатковими можливостями, і їх можна додавати, перепрограмовувати годинник під себе. Наразі в прошивці є всі можливості, що притаманні типовому годиннику і що дозволяє повноцінно використовувати його на щоденній основі. В цьому репозиторії можна знайти інфу і інструкції щоб зібрати собі такий годинник. Це у мене таке хобі:) Я в кінці 2023…

DRM Watch v3, from the project README
From the project README

Main components on the DRM Watch v3

ESP32-S2FN4R2ME6211 SOT23-5 3.3VTP4056DS3231SMicrochip HV857

DRM Watch v3 bill of materials (BOM)

68 components, 37 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S2FN4R2
Espressif
U1
1
ME6211 SOT23-5 3.3V
U2
1
TP4056
Texas Instruments
U3
1
DS3231S
Analog Devices
U4
1
Microchip HV857
microchip
U5
3
Brass SMTSO-M1.4X3X1.5-2X0.8
M1, M2, M3
2
2N7002LT1G (SOT-23-3)
ON Semiconductor
Q1, Q2
1
3225 4PIN 40Mhz 3.2*2.5mm Passive SMD Quartz Resonator Crystal
Y1
1
TYPE-C-31-M-12
HRO Electronics Co., Ltd.
J1
1
FPC 10pin 0.5mm pitch
J2
1
CMT-7525S-SMT
CUI Devices
LS1
4
2*4*3.5mm Micro SMD Tact Switch Side Button
S1, S2, S3, S4
2
LED RED
D1, D4
1
020 SMD Side View LED White 6000K
D2
2
LED BLUE
D3, D5
2
US1D
D6, D7
1
220uH
L1
1
0.1uF
C1
3
10pF
C2, C3, C13
4
0.1uF
C4, C5, C6, C8
Show 17 more
QtyPartRefs
2
1uF
C7, C14
3
1uF
C9, C10, C19
3
10uF
C11, C12, C15
1
12nF 200V
C16
1
4.7uF
C17
1
0.1uF
C18
4
1K
R1, R7, R8, R22
2
5.1K
R2, R3
5
R22
R4, R5, R6, R10, R23
1
2K
R9
4
100K
R11, R12, R13, R14
1
0 ohm
R15
1
10K
R16
1
560K
R17
1
2M
R18
2
4.3K
R19, R20
1
500R
R21

DRM Watch v3 design files

The KiCad project lives in the drfailov/DRM_Watch_v3 repository on GitHub; these links point at the commit this page was built from.

DRM Watch v3: common questions

What microcontroller does the DRM Watch v3 use?

The DRM Watch v3 is built around the ESP32-S2FN4R2, from the ESP32 family.

How big is the DRM Watch v3 PCB?

The DRM Watch v3 measures 62.7 × 44.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the DRM Watch v3?

68 components, from 37 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 DRM Watch v3 design files?

From the drfailov/DRM_Watch_v3 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 DRM Watch v3 design in my own project?

Yes, under the terms of its GPL-3.0 license, which drfailov chose for the repository.

Can I test firmware for the DRM Watch v3 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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