2 layers30 × 60 mm
THT
InputBlackBoxOutput/Breadboard-Power-Supply
PCB design files for a convenient breadboard power supply
20 parts2GPL-3.0
2 layers30 × 60 mm
PCB design files for a convenient breadboard power supply
- Size
- 30 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 16
- Pads
- 79
- Tracks, vias
- 220, 8
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 31 Oct 2020
- Updated
- 14 Jun 2026
Overview
SMD is an open-source printed circuit board by InputBlackBoxOutput, from the InputBlackBoxOutput/Breadboard-Power-Supply repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 30 × 60 mm with 28 parts on 16 nets, routed with 220 tracks and 8 vias.
It is built around the AMS1117-3.3, AMS1117-5.0 and LM317. Its parts include 6 connectors, 5 resistors, 4 capacitors, 3 ICs and 1 diode. It belongs with the power boards of this library.
Main components
3
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsAMS1117-5.0
SOT-223-40℃~+125℃ 1 1.3V 15V 1A 5V 60dB Fixed Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
LM317
SOT-223-40℃~+85℃@(Ta) 0.003%Vout 1 1.3V~37V 1A 40V 80dB@(120Hz) Adjustable Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSJSMSEMIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdBreadboard Power Supply
A convenient power supply to provide power while building and testing analog/digital circuits on a breadboard
Features
- Snaps right onto a breadboard
- Ships with 2 variants SMD and THT for choice of components
- Input power can be derived from a 12V SMPS via barrel jack or 5V via USB cable
- Switches to switch the output voltages on/off
- Provides variable voltage
Technical specification
- Output voltages: Fixed: 5 ± 0.150V and 3.3 ± 0.099V and Variable: 1.25V to ≈Vsupply
- Output currents: 1.1A max for each voltage when connected to a 12V 2A SMPS and 500 mA total when connected to USB
Caution: Do not connect current hungry components when input power is provided via USB
3D Render
| SMD variant | THT variant |
|---|---|
 |  |
Made with lots of ⏱️, 📚 and ☕ by InputBlackBoxOutput
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | TestPoint | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1, TP2, TP3, TP4, TP5 |
| 3 | LED | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | DS1, DS2, DS3 |
| 2 | 22uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3, C4 |
| 1 | 0.1uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | 1 | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical | J4 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 1uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2 |
| 1 | 2 | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical | J5 |
| 1 | 2.2k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | 240R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 5k | Potentiometer_SMD:Potentiometer_Bourns_3314G_Vertical | R1 |
| 1 | 820R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 9V Battery | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical_SMD_Pin1Left | J1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | AMS1117-5.0 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | Barrel_Jack_Switch | Board:BarrelJack_CUI_PJ-102AH_Horizontal | J2 |
| 1 | Conn_02x04_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical_SMD | J6 |
| 1 | LM317 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | SS22T3G | Diode_SMD:D_SMB | D1 |
| 1 | SW_DIP_x04 | Button_Switch_SMD:SW_DIP_SPSTx04_Slide_9.78x12.34mm_W8.61mm_P2.54mm | SW1 |
| 1 | USB_B | Board:USB_B_OST_USB-B1HSxx_Horizontal | J3 |
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Questions
How big is the SMD PCB?
It measures 30 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SMD use?
28 parts, built around the AMS1117-3.3, AMS1117-5.0 and LM317. 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 SMD KiCad files?
From the InputBlackBoxOutput/Breadboard-Power-Supply repository on GitHub, at the commit this page was made from: the board is SMD/board.kicad_pcb and its schematic SMD/board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SMD design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).