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ESP32-T7S3-ControlStand

RobertPHeller·2ndGenLocoControlStand·ESP32-T7S3-ControlStand/ESP32-T7S3-ControlStand.kicad_pcb

ESP32-T7S3-ControlStand PCB layout, top view — open source ESP32 board by RobertPHeller
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About the ESP32-T7S3-ControlStand PCB

ESP32-T7S3-ControlStand is an open source ESP32 PCB design by RobertPHeller, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 199.4 × 126.4 mm, with 139 components from 78 distinct parts.

Its main chip is the MCP23017, from the ESP32 family. Other key parts include the TBD62083A, TCAN332DR, MCP73871, LM2574HVM-5.0 and TTGO-T7_S3-V1.1. By type, the board carries 34 switches, 28 diodes, 25 resistors, 20 connectors, 11 capacitors and 9 ICs.

From the project

Model 2nd Generation Diesel Locomotive Control Stand

This is a model diesel locomotive control stand (more or less typical of a 2nd generation diesel locomotive).

2ndGenLocoControlStand.dxf, 2ndGenLocoControlStand.gcad, and 2ndGenLocoControlStand.tcl relate to the 3D model of the front panel (based on a Hammond Manucafturing RL6685 enclosure).

The ESP32ControlStand directory contains the ESP32 (TTGO-T1) based design, the electronics are in KiCad form (Version: 2013.06.11). The ESP32ControlStand/ESP32ControlStand_Node directory contains the OpenMRN code (C++, Arduino style using the OpenMRNLite library).

Main components on the ESP32-T7S3-ControlStand

MCP23017TBD62083ATCAN332DRMCP73871LM2574HVM-5.0TTGO-T7_S3-V1.1TCA8418

ESP32-T7S3-ControlStand bill of materials (BOM)

139 components, 78 distinct parts.

QtyPartRefs
2
MCP23017
U1, U3
2
TBD62083A
U2, U4
1
TCAN332DR
U5
1
MCP73871
U6
1
LM2574HVM-5.0
U7
1
TTGO-T7_S3-V1.1
U601
1
TCA8418
U701
2
Button & LED Panel
J1, J2
1
B4B-PH-SM4-TB
Display
J3
1
Horn
J4
1
Brake
J5
1
Light Switch
J6
1
Reverser
J7
1
Throttle
J8
2
RJ45
J9, J10
1
Barrel_Jack
J11
1
B2B-PH-SM4-TB
Battery
J12
1
Keypad Panel
J101
1
To Main Board
P1
1
Misc buttons, bell, status LED
P2
Show 58 more
QtyPartRefs
2
To Main Board
P6, P7
3
To Main Board
P8, P9, P701
1
Throttle
EN1
1
Reverser
EN2
1
Termination
JP1
2
330
RP1, RP2
1
A
SW1
1
B
SW2
1
C
SW3
1
D
SW4
1
Bell
SW5
16
SW_PUSH_SMALL
SW7, SW8, SW9, SW10, SW11, SW12, SW13, SW14 +8
1
On/Off
SW23
1
"1"
SW701
1
"4"
SW702
1
"7"
SW703
1
"*"
SW704
1
"2"
SW705
1
"5"
SW706
1
"8"
SW707
1
"0"
SW708
1
"3"
SW709
1
"6"
SW710
1
"9"
SW711
1
"#"
SW712
2
Buttons
T1, T3
2
LEDS
T2, T4
1
+ 15 in -
T5
1
+ 15 out -
T6
1
Status
D1
16
LED
D2, D3, D4, D5, D6, D7, D8, D9 +8
4
DFLS240-7
D18, D19, D25, D26
1
SMAJ5.0A/TR13
D20
3
LED
D21, D22, D23
1
SB160-E3/54
D27
1
ACT2
D28
1
ACT1
D29
1
330 uh
L1
3
.1 uf
C1, C2, C3
1
15 uf 63V
C4
1
47 nf
C5
1
10uf
C6
1
220 uf 25V
C8
2
4.7uf
C9, C10
1
22 uf 100V
C13
1
.1uf
C701
2
220 Ohms
R1, R2
4
100K Ohms
R3, R4, R5, R6
5
10K
R7, R8, R9, R14, R20
2
60 Ohms
R10, R11
1
330K
R12
1
110K
R13
3
470
R15, R16, R17
1
5K
R18
1
2K
R19
2
270
R23, R25
2
2.4K
R27, R30
1
10K
R701

ESP32-T7S3-ControlStand design files

The KiCad project lives in the RobertPHeller/2ndGenLocoControlStand repository on GitHub; these links point at the commit this page was built from.

ESP32-T7S3-ControlStand: common questions

What microcontroller does the ESP32-T7S3-ControlStand use?

The ESP32-T7S3-ControlStand is built around the MCP23017, from the ESP32 family.

How big is the ESP32-T7S3-ControlStand PCB?

The ESP32-T7S3-ControlStand measures 199.4 × 126.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ESP32-T7S3-ControlStand?

139 components, from 78 distinct parts. The full bill of materials is listed on this page.

Where can I download the ESP32-T7S3-ControlStand design files?

From the RobertPHeller/2ndGenLocoControlStand repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the ESP32-T7S3-ControlStand design in my own project?

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

Can I test firmware for the ESP32-T7S3-ControlStand 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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