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LM317 Adjustable power supply

Sarankumarvelusamy·LM317_Adjustable_power_supply·publish/hardware/firstproj.kicad_pcb

LM317 Adjustable power supply PCB layout, top view — open source board by Sarankumarvelusamy

About the LM317 Adjustable power supply PCB

LM317 Adjustable power supply is an open source PCB design by Sarankumarvelusamy, published on GitHub. It is a 2-layer board measuring 58.4 × 22.9 mm, with 14 components from 12 distinct parts.

Other key parts include the LM317_TO-220. By type, the board carries 5 capacitors, 3 diodes, 2 connectors, 2 resistors and 1 IC.

It belongs with the power & battery designs in this gallery.

From the project

Adjustable linear regulated DC power supply (1.25V–30V, 1.5A) designed in KiCad with full-wave rectification, diode protection, and production-ready Gerbers.

A robust, through-hole (THT) adjustable linear DC regulated power supply designed, routed, and verified in KiCad. The circuit provides low-noise, continuously variable DC voltage with integrated full-wave rectification, bulk ripple filtering, transient decoupling, and comprehensive reverse-bias diode protection.

$$V{\text{OUT}} = 1.25\,\text{V} \times \left(1 + \frac{R{\text{adj}}}{R1}\right) + I{\text{ADJ}} \cdot R_{\text{adj}}$$

Main components on the LM317 Adjustable power supply

LM317_TO-220

LM317 Adjustable power supply bill of materials (BOM)

14 components, 12 distinct parts.

QtyPartRefs
1
LM317_TO-220
U1
2
Screw_Terminal_01x02
J1, J2
1
10k
RV1
2
D
D1, D2
1
W01G
D5
1
1000u
C1
1
0.1u
C2
1
10u
C3
1
470u
C4
1
100n
C5
1
220
R1
1
12k
R2

LM317 Adjustable power supply design files

The KiCad project lives in the Sarankumarvelusamy/LM317_Adjustable_power_supply repository on GitHub; these links point at the commit this page was built from.

LM317 Adjustable power supply: common questions

How big is the LM317 Adjustable power supply PCB?

The LM317 Adjustable power supply measures 58.4 × 22.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LM317 Adjustable power supply?

14 components, from 12 distinct parts. The full bill of materials is listed on this page.

Where can I download the LM317 Adjustable power supply design files?

From the Sarankumarvelusamy/LM317_Adjustable_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 LM317 Adjustable power supply design in my own project?

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

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