4 layers190 × 100 mm
Rioctrl controller
festlv/rioctrl-hw
Hardware design for modular CNC controller
281 parts16CERN-OHL-S-2.0
2 layers100 × 100 mm
Rioctrl stepdir4
festlv/rioctrl-hw16Hardware design for modular CNC controller
- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 98
- Nets
- 100
- Pads
- 380
- Tracks, vias
- 657, 171
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 25 Aug 2024
- Updated
- 13 May 2025
Overview
Rioctrl stepdir4 is an open-source printed circuit board by festlv, from the festlv/rioctrl-hw repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 100 × 100 mm with 98 parts on 100 nets, routed with 657 tracks and 171 vias.
It is built around the CS48505S, USBLC6-4SC6 and AO3401A, with the BSS138W, BZT52C10S and SMF24A among its other parts. Its parts include 37 resistors, 12 ICs, 12 transistors, 10 capacitors and 10 diodes.
Main components
9
CS48505S
SOIC-8-40℃~+125℃ 256 3V~5.5V 500Kbps 5uA Half-Duplex Transceiver ±20kV SOIC-8 RS-485 / RS-422 ICs ROHSChipanalogRS-485 / RS-422 ICs
USBLC6-4SC6
SOT-23-6-55℃~+125℃ 0.3pF 15V 300W@8/20us 4.7A@8/20us 5V 6V 80nA ESD Four channels IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Unidirectional SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
BSS138W
SOT-323MOSFETshongjiacheng
BZT52C10S
SOD-323Zener Diodeshongjiacheng
SMF24A
SOD-123FL-65℃~+150℃ 1 1uA 200W 24V 26.7V、29.5V 38.9V 5.1A TVS Unidirectional SOD-123FL ESD and Surge Protection (TVS/ESD) ROHSHXY MOSFETESD And Surge Protection (TVS/ESD)
BSMD1206-100-24V
1206-40℃~+85℃ 1.4mm 1.8A 1.9mm 1A 1W 24V 3.6mm 300ms 300mΩ 40A 50mΩ 1206 Resettable Fuses ROHSBHFUSEResettable Fuses
UPZ1608E101-3R0TF
0603-55℃~+125℃ 1 100Ω@100MHz 30mΩ 3A ±25% 0603 Ferrite Beads ROHSSunlordFerrite Beads
R-RJ45R08P-C000
弯插0℃~+70℃ 1 13.1mm 15.75mm 16.26mm Gold Harpoon Contact (Plastic) Non-PoE Phosphor Bronze RJ45 Jack Right Angle Shielded With LED Push-Pull Ethernet Connectors / Modular Connectors (RJ45 RJ11) ROHSCkmtwEthernet Connectors / Modular Connectors (RJ45 RJ11)
README
rioctrl-stepdir4/README.mdrioctrl-stepdir4
This module provides 4 axis of step/dir/enable signals.
- Step/dir signals are differential 5V.
- Enable signal is at the same voltage as controller's DC input.
The connectors are RJ45 (intended use is either with motor-drive specific breakout board or a generic screw-terminal type breakout board).
RJ45 green LED is wired to enable signal.
Pinout (when using breakouts/rioctrl-rj45-breakout):
| Pin | Signal |
|---|---|
| 1 | Step + |
| 2 | Step - |
| 3 | Dir - |
| 4 | Enable |
| 5 | GND |
| 6 | Dir - |
| 7 | GND |
| 8 | GND |
Changelog
v1.1
- Fixed slot's pin-header position (was offset by 4 mm)
- Rename silkscreen labels from axis 1..4 to join 0..3 to match riocore/LinuxCNC convention
v1.0
Initial released version.
Parts
98| Qty | Value | Footprint | References |
|---|---|---|---|
| 21 | 10K | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R12, R13, R14, R15, R20, R21, R22, R23, R28, R29, R30, R31, R36 +5 |
| 16 | 100R | Resistor_SMD:R_0603_1608Metric | R8, R9, R10, R11, R16, R17, R18, R19, R24, R25, R26, R27, R32, R33, R34, R35 |
| 8 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C3, C4, C5, C6, C7, C8, C9, C10 |
| 8 | CS48505S | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1, U2, U4, U5, U7, U8, U10, U11 |
| 6 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q3, Q4, Q6, Q8, Q10, Q12 |
| 6 | BSS138W | Package_TO_SOT_SMD:SOT-323_SC-70 | Q1, Q2, Q5, Q7, Q9, Q11 |
| 5 | BZT52C10S | Diode_SMD:D_SOD-323 | D1, D3, D6, D9, D12 |
| 5 | SMF24A | Diode_SMD:D_SOD-123F | D2, D4, D7, D10, D13 |
| 4 | BSMD1206-100-24V | Fuse:Fuse_1206_3216Metric | F1, F2, F3, F4 |
| 4 | FB_100R_3A | Inductor_SMD:L_0603_1608Metric | FB1, FB2, FB3, FB4 |
| 4 | MH_3.2mm | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 4 | RJ45_LED_Shielded | hadv-connectors:R-RJ45R08P-C000 | J2, J3, J4, J5 |
| 4 | USBLC6-4SC6 | Package_TO_SOT_SMD:SOT-23-6 | U3, U6, U9, U12 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 1 | Conn_02x13_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x13_P2.54mm_Horizontal | J1 |
Questions
How big is the Rioctrl stepdir4 PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Rioctrl stepdir4 use?
98 parts, built around the CS48505S, USBLC6-4SC6, AO3401A and BSS138W. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Rioctrl stepdir4 KiCad files?
From the festlv/rioctrl-hw repository on GitHub, at the commit this page was made from: the board is rioctrl-stepdir4/rioctrl-stepdir4.kicad_pcb and its schematic breakouts/ditron-dc11-encoder/ditron-dc11-encoder.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Rioctrl stepdir4 design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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