Breadboard-Power-Supply

prajeetkumar2006·Breadboard-Power-Supply·Power Supply - Project/Power Supply - Project.kicad_pcb

Breadboard-Power-Supply PCB layout, top view — open source board by prajeetkumar2006

About the Breadboard-Power-Supply PCB

Breadboard-Power-Supply is an open source PCB design by prajeetkumar2006, published on GitHub. It is a 2-layer board measuring 31 × 52.5 mm, with 17 components from 13 distinct parts.

Other key parts include the LM7805_TO220 and LM317_TO-220. By type, the board carries 7 connectors, 3 capacitors, 3 resistors, 2 ICs, 1 switch and 1 diode.

It belongs with the power & battery, sensors and dev boards & breakouts designs in this gallery.

From the project

Dual regulated power supply module converting 12 V DC to stable 5 V and 3.3 V outputs. Uses LM7805 for 5 V regulation and LM317 for adjustable 3.3 V output. Includes voltage selector jumpers, breadboard headers, and screw terminals for flexible output routing. Designed for powering microcontrollers, sensors, and prototyping circuits reliably.

Dual regulated power supply module converting 12 V DC to stable 5 V and 3.3 V outputs. Uses LM7805 for 5 V regulation and LM317 for adjustable 3.3 V output. Includes voltage selector jumpers, breadboard headers, and screw terminals for flexible output routing. Designed for powering microcontrollers, sensors, and prototyping circuits reliably.

- DC Barrel Jack (with internal switch) - SPDT Toggle Switch (Power ON/OFF) - LM7805 Voltage Regulator (TO-220, 5V) - LM317 Adjustable Voltage Regulator (TO-220, 3.3V) - Resistors: - 330 Ω ×2 (LM317 voltage divider, LED current limit) - 560 Ω ×1 (LM317…

Main components on the Breadboard-Power-Supply

LM7805_TO220 LM317_TO-220

Breadboard-Power-Supply bill of materials (BOM)

17 components, 13 distinct parts.

Qty	Part	Footprint	Refs
1	LM7805_TO220	TO-220-3_Vertical	U1
1	LM317_TO-220	TO-220-3_Vertical	U2
2	Conn_01x02_Pin	PinHeader_1x02_P2.54mm_Vertical	J1, J2
2	Conn_01x03_Pin	PinHeader_1x03_P2.54mm_Vertical	J3, J4
1	Barrel_Jack_Switch	BarrelJack_Horizontal	J5
2	Screw_Terminal_01x02	TerminalBlock_bornier-2_P5.08mm	J6, J7
1	EG1218 E-Switch	Switch_Slide_11.6x4mm_EG1218	S1
1	LED	LED_D5.0mm	D1
1	10u	C_Disc_D3.0mm_W1.6mm_P2.50mm	C1
1	1u	C_Disc_D3.0mm_W1.6mm_P2.50mm	C2
1	0.1u	C_Disc_D3.0mm_W1.6mm_P2.50mm	C3
2	330	R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal	R1, R2
1	560	R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal	R3

Breadboard-Power-Supply design files

The KiCad project lives in the prajeetkumar2006/Breadboard-Power-Supply repository on GitHub; these links point at the commit this page was built from.

Breadboard-Power-Supply: common questions

How big is the Breadboard-Power-Supply PCB?

The Breadboard-Power-Supply measures 31 × 52.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Breadboard-Power-Supply?

17 components, from 13 distinct parts. The full bill of materials is listed on this page.

Where can I download the Breadboard-Power-Supply design files?

From the prajeetkumar2006/Breadboard-Power-Supply repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Breadboard-Power-Supply design in my own project?

The repository has no license, so all rights stay with prajeetkumar2006. Use it as a reference, and ask the author before reusing the design.

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