HardLabs

RS64c

lhm0·rotating_sphere·rotating_sphere_electronics/RS64c/RS64c.kicad_pcb

RS64c PCB layout, top view — open source RP2040/RP2350 board by lhm0

About the RS64c PCB

RS64c is an open source RP2040/RP2350 PCB design by lhm0, published on GitHub under the CC-BY-NC-4.0 license. It is a 4-layer board measuring 168 × 131 mm, with 145 components from 30 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the USBLC6-2SC6, W25Q128JVS, 74AHC04, ESP01S and STP24DP05BTR. By type, the board carries 64 diodes, 27 capacitors, 25 resistors, 17 ICs, 8 transistors and 2 connectors.

It belongs with the displays & leds and power & battery designs in this gallery.

From the project

Rotating LED Sphere - a POV display with RP2040

However, alignment of the rotor now is done by placing washers between header and pcb, if necessary.

Furthermore, I have added a file "print_instructions.pdf" in the /mechanics subfolder, with slicer images of the parts that need nut inlays.

UPDATE August 29th, 2025 There are two push switches on the power supply pcb, that control the speed of the motor. The "speed" button is used to increase the motor speed step by step. Once the maximum speed is reached, it jumps back to zero. The "off" button turns the motor off.

RS64c, from the project README
From the project README

Main components on the RS64c

USBLC6-2SC6W25Q128JVSRP204074AHC04ESP01SSTP24DP05BTR74HCT138

RS64c bill of materials (BOM)

145 components, 30 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
~
U201
2
~
U202, U203
4
~
U204, U205, U206, U207
3
~
U208, U209, U210
1
USBLC6-2SC6
U301
1
W25Q128JVS
U302
1
RP2040
U303
1
74AHC04
U304
1
ESP01S
ESP01s
U305
1
STP24DP05BTR
U401
1
74HCT138
U402
8
IRLML6401
Q501, Q502, Q503, Q504, Q505, Q506, Q507, Q508
1
12MHZ
12MHz
Y301
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
J301
1
C5155564
Micro_SD_Card
J302
1
C5155584
SW_Push_Dual
SW301
32
LED_BARG
D501, D502, D503, D504, D505, D506, D507, D508 +24
32
LED_BARG
D533, D534, D535, D536, D537, D538, D539, D540 +24
13
100NF
100nF
C301, C302, C304, C307, C308, C310, C312, C313 +5
1
C15850
10µF
C303
Show 10 more
QtyPartRefs
2
27PF
27pF
C305, C306
2
C52923
1µF
C309, C311
9
C96446
10µF
C402, C501, C502, C503, C504, C505, C506, C507 +1
2
1k
R301, R308
2
5K1
5k1
R302, R303
1
do not fit
R304
2
27R
R305, R306
7
10K
10k
R307, R309, R311, R312, R313, R401, R402
3
270
R403, R404, R405
8
47K
47k
R406, R407, R408, R409, R410, R411, R412, R413

RS64c design files

The KiCad project lives in the lhm0/rotating_sphere repository on GitHub; these links point at the commit this page was built from.

RS64c: common questions

What microcontroller does the RS64c use?

The RS64c is built around the RP2040, from the RP2040/RP2350 family.

How big is the RS64c PCB?

The RS64c measures 168 × 131 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the RS64c?

145 components, from 30 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 RS64c design files?

From the lhm0/rotating_sphere 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 RS64c design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the RS64c without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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