HardLabs

Control

kramerbastian·stellwerk·hardware/pcbs/control/control.kicad_pcb

Control PCB layout, top view — open source ESP32 board by kramerbastian
Simulate this board

About the Control PCB

Control is an open source ESP32 PCB design by kramerbastian, published on GitHub. It is a 2-layer board measuring 94.6 × 88.4 mm, with 65 components from 19 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the AMS1117-3.3, TCAN332D, PCF8574T and 74HC595. By type, the board carries 28 resistors, 14 connectors, 12 capacitors, 8 ICs and 3 switches.

It belongs with the iot & wireless designs in this gallery.

From the project

stellwerk is a framework for creating custom model railway control panels from scratch.

stellwerk is a framework for creating custom model railway control panels from scratch. It includes a custom-designed control PCB with over 50 inputs and outputs, supporting both LCC and USB connectivity. The project also provides a guide for designing your own control panel layouts using UV-printed aluminum PCBs.

After designing and building a custom model railway throttle from scratch about six months ago, I wanted to bring that same analogue feel to controlling not just locomotives, but also accessories like turnouts. Physically flipping switches to change a turnout’s position is just far…

Control, from the project README
From the project README

Main components on the Control

ESP32-S3-WROOM-1AMS1117-3.3TCAN332DPCF8574T74HC595

Control bill of materials (BOM)

65 components, 19 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-WROOM-1
U1
1
AMS1117-3.3
U2
1
TCAN332D
U3
3
PCF8574T
U4, U5, U6
2
74HC595
U8, U9
1
USB_B
J1
3
RJ45_LED_Shielded
J2, J3, J4
2
Conn_01x07
J5, J6
6
2601
J7, J8, J9, J12, J13, J14
1
JST PH
J10
1
Conn_01x02
J11
1
Reset
SW1
1
Boot
SW2
1
PWR Sel
SW3
9
100n
C1, C2, C3, C7, C9, C10, C11, C12 +1
3
100u
C4, C5, C6
25
10k
R1, R12, R13, R14, R15, R16, R17, R18 +17
1
120
R2
2
150
R19, R20

Control design files

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

Control: common questions

What microcontroller does the Control use?

The Control is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the Control PCB?

The Control measures 94.6 × 88.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Control?

65 components, from 19 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 Control design files?

From the kramerbastian/stellwerk 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 Control design in my own project?

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

Can I test firmware for the Control 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.

Similar boards