HardLabs

OpenRockTumbler

agmlego·OpenRockTumbler·electrical/OpenRockTumbler.kicad_pcb

OpenRockTumbler PCB layout, top view — open source ESP32 board by agmlego

About the OpenRockTumbler PCB

OpenRockTumbler is an open source ESP32 PCB design by agmlego, published on GitHub. It is a 2-layer board measuring 120 × 44 mm, with 28 components from 21 distinct parts.

Its main chip is the ESP32-WROOM-32E, from the ESP32 family. Other key parts include the INND-TS56YGCB, 74LS48 and R-78E3.3-1.0. By type, the board carries 7 resistors, 6 connectors, 6 switches, 5 capacitors and 4 ICs.

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

From the project

This project aims to be a drop-in replacement controller for common rock tumblers such as the KoolStone C1 Pro.

This project aims to be a drop-in replacement controller for common rock tumblers such as the KoolStone C1 Pro.

ESPHome-compatible controller for potential integration with Home Assistant Timer: More than 9-day limit Resume tumbling after power loss if time remaining Periodic stir operation after timer end to prevent grit from settling Hall effect rotation sensor: Detect if drum is actually turning Alerts if belt breaks * Constant speed control

Main components on the OpenRockTumbler

INND-TS56YGCB74LS48ESP32-WROOM-32ER-78E3.3-1.0

OpenRockTumbler bill of materials (BOM)

28 components, 21 distinct parts.

QtyPartRefs
1
INND-TS56YGCB
U1
1
74LS48
U2
1
ESP32-WROOM-32E
U3
1
R-78E3.3-1.0
U5
1
12VDC
J1
1
MOTOR
J2
1
HALL
J3
1
Conn_02x05_Odd_Even
J5
1
Conn_02x03_Odd_Even
J6
1
I2C
J10
1
DAY+
SW1
1
DAY-
SW2
1
ON/OFF
SW3
1
PAUSE/RESUME
SW4
1
SPEED+
SW5
1
SPEED-
SW6
2
10µF
C1, C2
3
0.1µF
C6, C7, C8
1
2K2
R2
2
4K7
R4, R7
Show 1 more
QtyPartRefs
4
10K
R5, R6, R8, R9

OpenRockTumbler design files

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

OpenRockTumbler: common questions

What microcontroller does the OpenRockTumbler use?

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

How big is the OpenRockTumbler PCB?

The OpenRockTumbler measures 120 × 44 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the OpenRockTumbler?

28 components, from 21 distinct parts. The full bill of materials is listed on this page.

Where can I download the OpenRockTumbler design files?

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

Can I use the OpenRockTumbler design in my own project?

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

Can I test firmware for the OpenRockTumbler 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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