HardLabs

Led pwm-4bit

hyiger·led-pwm-4bit

Led pwm-4bit PCB layout, top view — open source AVR/Arduino board by hyiger

About the Led pwm-4bit PCB

Led pwm-4bit is an open source AVR/Arduino PCB design by hyiger, published on GitHub. It is a 2-layer board measuring 40 × 30 mm, with 32 components from 20 distinct parts.

Its main chip is the ATTINY412-SSN, from the AVR/Arduino family. Other key parts include the MCP1792T-3302H/CB. By type, the board carries 11 resistors, 9 capacitors, 4 connectors, 3 diodes, 2 ICs and 2 fuses.

From the project

4-bit LED PWM controller for a 24 V strip, driven by a Prusa GPIO Hackerboard (KiCad 10)

A 40 × 30 mm two-layer board that dims a 24 V LED strip to one of 16 levels set by four open-drain outputs of a Prusa GPIO Hackerboard. An ATtiny412 reads the 4-bit word and drives a low-side N-MOSFET with 10-bit PWM at about 2.4 kHz.

KiCad 10 project. The design brief is docs/spec.md and the reference netlist is docs/netlist.txt.

All parts are chosen from manufacturers Mouser stocks, and each was checked against its manufacturer's datasheet for package, pinout and ratings. Capacitor values were also checked against DC-bias data. fab/led-pwm-4bit-bom.csv is the full BOM and…

Led pwm-4bit, from the project README
From the project README

Main components on the Led pwm-4bit

MCP1792T-3302H/CBATTINY412-SSN

Led pwm-4bit bill of materials (BOM)

32 components, 20 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP1792T-3302H/CB
Microchip
U1
1
ATTINY412-SSN
ATtiny412-SSN
Microchip
U2
1
RTR030N05HZGTL
RTR030N05HZG
ROHM
Q1
1
1984617
24V IN
Phoenix Contact
J1
1
1984617
LED STRIP
Phoenix Contact
J2
1
61300511121
HACKERBOARD
Wurth Elektronik
J3
1
61300611121
FTDI-UPDI
Wurth Elektronik
J4
1
1812L050/60MR
0.5A 60V
Littelfuse
F1
1
0ZCG0010FF2C
0.1A 60V
Bel Fuse
F2
2
B160-13-F
B160
Diodes Inc
D1, D2
1
BAT54HT1G
onsemi
D3
1
GRM188R61H225KE11D
2.2u 50V X5R
Murata
C1
2
GRM31CR71H475MA12L
4.7u 50V X7R
Murata
C2, C9
1
CL10A106MP8NQWC
10u 10V X5R
Samsung
C3
1
C0603C104K5RACTU
100n 50V X7R
KEMET
C4
4
C0603C103K5RACTU
10n 50V X7R
KEMET
C5, C6, C7, C8
1
RC0603FR-07100RL
100
YAGEO
R1
1
RC0603FR-07100KL
100k
YAGEO
R2
8
RC0603FR-0710KL
10k
YAGEO
R3, R4, R5, R6, R7, R8, R9, R10
1
RC0603FR-07470RL
470
YAGEO
R11

Led pwm-4bit design files

The KiCad project lives in the hyiger/led-pwm-4bit repository on GitHub; these links point at the commit this page was built from.

Led pwm-4bit: common questions

What microcontroller does the Led pwm-4bit use?

The Led pwm-4bit is built around the ATTINY412-SSN, from the AVR/Arduino family.

How big is the Led pwm-4bit PCB?

The Led pwm-4bit measures 40 × 30 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Led pwm-4bit?

32 components, from 20 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Led pwm-4bit design files?

From the hyiger/led-pwm-4bit repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Led pwm-4bit design in my own project?

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

Can I test firmware for the Led pwm-4bit 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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