Single-Channel-Sugar-Cube-Relay-Module-
sukeshraom·Single-Channel-Sugar-Cube-Relay-Module-
About the Single-Channel-Sugar-Cube-Relay-Module-
Single-Channel-Sugar-Cube-Relay-Module- is an open source PCB design by sukeshraom, published on GitHub. It is a 2-layer board measuring 50 × 23 mm, with 13 components from 11 distinct parts.
Other key parts include the PC817. By type, the board carries 5 resistors, 3 diodes, 2 connectors, 1 IC, 1 transistor and 1 relay.
From the project
Single Channel Sugar Cube Relay Module designed in KiCad with an optocoupler-isolated input and transistor-based relay driver. Supports both 6 V and 12 V relay variants. Suitable for Arduino, ESP32, STM32, Raspberry Pi, and other embedded systems for reliable AC/DC load switching and automation applications.
A compact single-channel relay module designed in KiCad featuring an optocoupler-isolated input and transistor-based relay driver. The design supports both 5 V and 12 V Sugar Cube relays and is suitable for Arduino, ESP32, STM32, Raspberry Pi, PLCs, and other embedded control systems.

Main components on the Single-Channel-Sugar-Cube-Relay-Module-
Single-Channel-Sugar-Cube-Relay-Module- bill of materials (BOM)
13 components, 11 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PC817 | SMDIP-4_W7.62mm | U3 |
| 1 | BC847 | SOT-23 | Q1 |
| 1 | CONN_01X03_PIN Conn_01x03_Pin | TerminalBlock_bornier-3_P5.08mm | J1 |
| 1 | CONN_01X03_PIN Conn_01x03_Pin | PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | JQC-3FF-005-1Z | Relay_SPDT_Hongfa_JQC-3FF_0XX-1Z | K1 |
| 1 | 1N4007 | D_SOD-123 | D1 |
| 2 | LED | LED_0805_2012Metric | D2, D5 |
| 2 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R5 |
| 1 | 100 | R_0805_2012Metric | R2 |
| 1 | 100 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
| 1 | 10K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11 |
Single-Channel-Sugar-Cube-Relay-Module- design files
The KiCad project lives in the sukeshraom/Single-Channel-Sugar-Cube-Relay-Module- repository on GitHub; these links point at the commit this page was built from.
- LayoutSingle_ch_relay.kicad_pcb
- SchematicSingle_ch_relay.kicad_sch
- BOMbom.csv
Single-Channel-Sugar-Cube-Relay-Module-: common questions
How big is the Single-Channel-Sugar-Cube-Relay-Module-?
The Single-Channel-Sugar-Cube-Relay-Module- measures 50 × 23 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Single-Channel-Sugar-Cube-Relay-Module-?
13 components, from 11 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 Single-Channel-Sugar-Cube-Relay-Module- design files?
From the sukeshraom/Single-Channel-Sugar-Cube-Relay-Module- 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 Single-Channel-Sugar-Cube-Relay-Module- design in my own project?
The repository has no license, so all rights stay with sukeshraom. Use it as a reference, and ask the author before reusing the design.