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Custom PSU

GodOfStrategy·Custom-PSU·Production/PCB 1/Custom_PSU.kicad_pcb

Custom PSU PCB layout, top view — open source AVR/Arduino board by GodOfStrategy

About the Custom PSU PCB

Custom PSU is an open source AVR/Arduino PCB design by GodOfStrategy, published on GitHub. It is a 2-layer board measuring 99.6 × 73.1 mm, with 105 components from 64 distinct parts.

Its main chip is the ATmega328-P, from the AVR/Arduino family. Other key parts include the CH340G, MCP4725A0T-E/CH, INA260, LM5116MHX/NOPB and LM51231QRGRRQ1. By type, the board carries 41 capacitors, 31 resistors, 11 ICs, 7 connectors, 4 transistors and 4 inductors.

It belongs with the displays & leds, power & battery and test & measurement designs in this gallery.

From the project

This project is my attempt at designing a fully programmable bench power supply from the ground up.

This project is my attempt at designing a fully programmable bench power supply from the ground up.

Most hobbyist power supplies are either simple fixed-voltage supplies or rely heavily on pre-built modules. I wanted to understand the entire system myself, from power conversion and feedback control to measurement, user interface, and digital regulation. The result is a custom-designed power supply capable of generating an adjustable output of approximately 0V to 30V at up to 5A from a standard 12V DC adapter.

Custom PSU, from the project README
From the project README

Main components on the Custom PSU

ATmega328-PCH340GMCP4725A0T-E/CHINA260LM5116MHX/NOPBLM51231QRGRRQ12920L500/30GRMAX7219M/TRTPS54202DDCR

Custom PSU bill of materials (BOM)

105 components, 64 distinct parts.

QtyPartRefs
1
ATmega328-P
U1
1
CH340G
U2
1
MCP4725A0T-E/CH
U3
1
INA260
U4
1
LM5116MHX/NOPB
LM5116MHX
TI(德州仪器)
U5
1
LM51231QRGRRQ1
LM51231QRGRRQ1_C6286802
TI(德州仪器)
U6
1
2920L500/30GR
LUTE(陆特)
U7
3
MAX7219M/TR
HGSEMI(华冠)
U8, U9, U10
1
TPS54202DDCR
TI(德州仪器)
U11
2
SI7850DP
SI7850DP_C18197826
TECH PUBLIC(台舟)
Q1, Q2
2
BSC014N06NS
Infineon(英飞凌)
Q3, Q4
1
16MHz
Y1
1
12 MHz
Y2
1
USB_C_Receptacle_USB2.0_16P
J1
3
Conn_02x06_Counter_Clockwise
J2, J4, J5
1
Screw_Terminal_01x02
J3
2
Conn_01x03_Pin
J6, J7
1
DC-005-A200
XUNPU(讯普)
DC1
1
RS601A-1020013BB
HCTL(华灿天禄)
SW3
2
SMBJ33A
SMBJ33A_C224019
Littelfuse(美国力特)
D1, D2
Show 44 more
QtyPartRefs
1
CMPD2003 TR PBFREE
Central(中环)
D3
1
FerriteBead
FB1
1
SMMS0530-100M
10 uH
SXN(顺翔诺)
L1
1
FXL0630-8R2-M
8.2 uH
cjiang(长江微电)
L2
1
CDRH6D28NP-6R0NC
6 uH
Sumida(胜美达)
L3
8
0.1 uF
C1, C3, C5, C12, C33, C35, C37, C39
2
100 nF
C2, C30
6
10 uF
C4, C6, C11, C32, C34, C36
4
22 pF
C7, C8, C9, C10
3
EEVTG1H471M
PANASONIC(松下)
C13, C15, C17
3
0.1uF
C14, C16, C18
1
3.3 nF
C19
1
100 pF
C20
1
10 nF
C21
1
270 pF
C22
1
1uF
C23
2
1 uF
C24, C29
1
100nF
C25
1
2.2uF
C26
1
2.7nF
C27
1
150 nF
C28
1
15 uF
C31
1
3.3uF
C38
1
68pF
C40
1
47 uF
C41
2
5.1K
R1, R2
2
22
R3, R4
2
4.7K
R5, R6
1
102K
R7
1
21K
R8
7
10K
R9, R15, R24, R25, R26, R27, R31
1
12.4K
R10
1
18K
R11
1
1.21K
R12
3
100K
R13, R19, R28
1
0.01
R14
1
0
R16
1
3.74K
R17
1
5m
R18
2
17.4K
R20, R21
1
50K
R22
1
1K
R23
1
100K
R29
1
13.7K
R30

Custom PSU design files

The KiCad project lives in the GodOfStrategy/Custom-PSU repository on GitHub; these links point at the commit this page was built from.

Custom PSU: common questions

What microcontroller does the Custom PSU use?

The Custom PSU is built around the ATmega328-P, from the AVR/Arduino family.

How big is the Custom PSU PCB?

The Custom PSU measures 99.6 × 73.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Custom PSU?

105 components, from 64 distinct parts. The full bill of materials is listed on this page.

Where can I download the Custom PSU design files?

From the GodOfStrategy/Custom-PSU repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Custom PSU design in my own project?

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

Can I test firmware for the Custom PSU without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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