HardLabs

Time2time

Resaj·time2time·hw/Kicad/time2time.kicad_pcb

Time2time PCB layout, top view — open source ESP32 board by Resaj

About the Time2time PCB

Time2time is an open source ESP32 PCB design by Resaj, published on GitHub. It is a 2-layer board measuring 50 × 70 mm, with 80 components from 45 distinct parts.

Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the LMR62421XMF, TPS63001, MCP73871-2CC and CP2102N-A01-GQFN28. By type, the board carries 32 resistors, 19 capacitors, 8 diodes, 5 ICs, 5 connectors and 5 switches.

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

From the project

Chronometer with partials measurement for the line-following competitions

Chronometer with partials measurement for the line-following competitions.

Characteristics: - ESP32 module (STM microcontroller + Bluetooth + Wifi) - Industrial distance sensor for robots pass-through detection - Lipo 1S battery - USB Lipo battery charge management - I2C OLED display port - Buzzer for robots pass-through signaling - RGB led for chronometer status signaling - Firmware upload via USB - Address selection to synchronize several modules - Expansion port for future improvements

Time2time, from the project README
From the project README

Main components on the Time2time

LMR62421XMFTPS63001MCP73871-2CCCP2102N-A01-GQFN28ESP32-WROOM-32

Time2time bill of materials (BOM)

80 components, 45 distinct parts.

QtyPartRefs
1
LMR62421XMF
U201
1
TPS63001
U202
1
MCP73871-2CC
U203
1
CP2102N-A01-GQFN28
U301
1
ESP32-WROOM-32
U302
1
TSM2312CX
Q301
1
USB_B_Micro
J201
1
LIPO 1S
J202
1
Conn_display
J301
1
Conn_expansion
J302
1
Conn_E3Z-D62
J303
1
AT-0927-TT-6-R
BZ301
1
1A
F201
1
SW_SPDT
SW1
4
SW_Push
SW301, SW302, SW303, SW304
1
Thermistor_NTC
TH201
1
ESDA6V1BC6
D201
2
RB751S40T5G
D202, D304
2
1N4148W-7-F
D203, D303
1
MM3Z3V3ST1G
D204
Show 25 more
QtyPartRefs
1
BAV19W-TP
D301
1
CLVBA-FKA-CA1D181BB7D3D3
D302
1
NRH3012T6R8MN
L201
1
NRH2412T2R2MNGH
L202
7
10uF
C201, C203, C205, C207, C209, C210, C211
1
220uF
C202
1
10uF 16V
C204
1
220pF
C206
5
100nF
C208, C302, C303, C305, C308
2
4.7uF
C301, C304
1
N/A
C306
1
1uF
C307
7
10K
R201, R206, R211, R212, R213, R310, R318
5
100K
R202, R205, R302, R309, R312
1
12K
R203
1
1K8
R204
5
1K
R207, R313, R314, R316, R319
1
0
R208
1
N/A
R209
5
100
R210, R301, R306, R311, R317
1
22K
R303
2
47K
R304, R307
1
4K7
R305
1
120K
R308
1
10
R315

Time2time design files

The KiCad project lives in the Resaj/time2time repository on GitHub; these links point at the commit this page was built from.

Time2time: common questions

What microcontroller does the Time2time use?

The Time2time is built around the ESP32-WROOM-32, from the ESP32 family.

How big is the Time2time PCB?

The Time2time measures 50 × 70 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Time2time?

80 components, from 45 distinct parts. The full bill of materials is listed on this page.

Where can I download the Time2time design files?

From the Resaj/time2time repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Time2time design in my own project?

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

Can I test firmware for the Time2time 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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