2 layers70 × 120.3 mm
2 layers45.3 × 28.1 mm
PSU
ray33ee/DCT- Size
- 45.3 × 28.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 21
- Nets
- 10
- Pads
- 40
- Tracks, vias
- 51, 2
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 22 Nov 2024
- Updated
- 21 Jul 2025
Overview
PSU is an open-source printed circuit board by ray33ee, from the ray33ee/DCT repository on GitHub. It is a 2-layer board of 45.3 × 28.1 mm with 21 parts on 10 nets, routed with 51 tracks and 2 vias.
It is built around the CJ2301 and PMBT2222A. Its parts include 8 resistors, 5 capacitors, 5 connectors, 2 transistors and 1 inductor. It belongs with the power boards of this library.
Main components
2Parts
21| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | Conn_01x01_Pin | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J1, J2, J3, J5 |
| 3 | 0.1µF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2, C3 |
| 2 | 100µF | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C4, C5 |
| 1 | 1 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1 |
| 1 | 100 | Resistor_SMD:R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R2 |
| 1 | 150µH | Inductor_THT:L_Axial_L11.0mm_D4.5mm_P15.24mm_Horizontal_Fastron_MECC | L1 |
| 1 | 18k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R4 |
| 1 | 2k2 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R8 |
| 1 | 33k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5 |
| 1 | 36k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R6 |
| 1 | 68k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R7 |
| 1 | 820 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3 |
| 1 | CJ2301 | Package_TO_SOT_SMD:SOT-23 | Q3 |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J6 |
| 1 | PMBT2222A | Package_TO_SOT_SMD:SOT-23 | Q2 |
Questions
How big is the PSU PCB?
It measures 45.3 × 28.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PSU use?
21 parts, built around the CJ2301 and PMBT2222A. 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 PSU KiCad files?
From the ray33ee/DCT repository on GitHub, at the commit this page was made from: the board is schematics/PSU/PSU.kicad_pcb and its schematic schematics/PSU/PSU.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PSU design in my own project?
Its repository states no licence, so its author keeps all rights: ask ray33ee before reusing the design.
More from ray33ee/DCT
4- 2 layers47.5 × 27 mm
- 2 layers139.2 × 55.5 mm
- 2 layers19 × 15.2 mm
Similar boards
- 2 layers57.2 × 35.1 mm
- 2 layers83.3 × 76.1 mm
Srom
derekfountain/zx-spectrum-pico-rom
A Raspberry Pi Pico based device to emulate a ROM on a ZX Spectrum
31 parts44GPL-2.0 - 4 layers100 × 99.9 mm
Srom
derekfountain/zx-spectrum-pico-interface-one
A recreation of the ZX Spectrum Expansion System, a hardware Microdrive emulator
43 parts42GPL-2.0 - 6 layers95.9 × 90.2 mm
Cpb
OakwoodEngineering/ObiWanKomputer
The Obi Wan Komputer and Combined Payload Boards from the NyanSat project.
251 parts10 - 2 layers99.9 × 98.2 mm
Zx spectrum diagnostics
derekfountain/zx-spectrum-diagnostics
A hardware diagnostics board for the 48K ZX Spectrum
76 parts8GPL-3.0 - 2 layers98.2 × 99.9 mm
Zx spectrum pico dma
derekfountain/zx-spectrum-pico-dma
Exploring using a microcontroller for DMA transfers into a ZX Spectrum
20 partsGPL-3.0 - 4 layers142.9 × 91.9 mm
- 4 layers144.5 × 95.5 mm
