HardLabs

Psu monitor

dragonlock2·kicadboards·projects/psu_monitor/psu_monitor.kicad_pcb

Psu monitor PCB layout, top view — open source AVR/Arduino board by dragonlock2

About the Psu monitor PCB

Psu monitor is an open source AVR/Arduino PCB design by dragonlock2, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 67 × 28 mm, with 94 components from 39 distinct parts.

Its main chip is the ATmega328PB-A, from the AVR/Arduino family. Other key parts include the MIC5019, MCP6L02x-xMS, MIC5365-3.3YC5 and SSD1306. By type, the board carries 45 resistors, 19 capacitors, 9 connectors, 8 ICs, 7 transistors and 3 switches.

From the project

Offsite backup for the miscellaneous KiCad boards that don't fit elsewhere

Adding current and voltage monitoring to a salvaged PSU along with a GUI and software controlled high side switches. I didn't realize shorting the 5V rail on the PSU causes a spike on release, killing all of my chips. I have since bought a bench PSU, so this project is on indefinite hold.

Main components on the Psu monitor

MIC5019MCP6L02x-xMSATmega328PB-AMIC5365-3.3YC5SSD1306

Psu monitor bill of materials (BOM)

94 components, 39 distinct parts.

QtyPartRefs
3
MIC5019
U1, U4, U6
2
MCP6L02x-xMS
U2, U3
1
ATmega328PB-A
U5
1
MIC5365-3.3YC5
U7
1
SSD1306
U8
3
PSMN4R5-30YLC
Q1, Q2, Q3
3
DMG2302UK-7
Q4, Q5, Q7
1
DMP3099L-7
Q6
1
16MHz
Y1
1
+12V_OUT
J2
1
+5Vsb
J3
1
PWR_EN
J5
1
PWR_OK
J6
1
ICSP/UART
J8
1
+5V_OUT
J9
1
+3V3_OUT
J11
1
-12V_OUT
J13
1
GND_OUT
J14
1
500mA
F1
1
BTN0
SW1
Show 19 more
QtyPartRefs
1
BTN1
SW2
1
BTN2
SW3
1
FerriteBead_Small
FB1
8
10u
C1, C4, C5, C6, C10, C15, C16, C19
7
100n
C2, C3, C7, C8, C9, C11, C14
2
1u
C12, C13
2
2u2
C17, C18
7
10k
R1, R4, R15, R20, R21, R36, R39
8
2k2
R2, R5, R23, R24, R28, R29, R35, R38
3
10m
R3, R14, R22
4
100k
R6, R7, R8, R42
2
10M
R9, R10
6
22k
R11, R18, R19, R30, R31, R45
3
22
R12, R13, R25
6
1k
R16, R17, R26, R27, R32, R33
1
390k
R34
1
1
R37
2
36k
R40, R41
2
1M
R43, R44

Psu monitor design files

The KiCad project lives in the dragonlock2/kicadboards repository on GitHub; these links point at the commit this page was built from.

Psu monitor: common questions

What microcontroller does the Psu monitor use?

The Psu monitor is built around the ATmega328PB-A, from the AVR/Arduino family.

How big is the Psu monitor PCB?

The Psu monitor measures 67 × 28 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Psu monitor?

94 components, from 39 distinct parts. The full bill of materials is listed on this page.

Where can I download the Psu monitor design files?

From the dragonlock2/kicadboards repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Psu monitor design in my own project?

Yes, under the terms of its Apache-2.0 license, which dragonlock2 chose for the repository.

Can I test firmware for the Psu monitor 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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