HardLabs

Quad tic timer

lily-osp·quad-tic-timer·pcb/quad-tic-timer.kicad_pcb

Quad tic timer PCB layout, top view — open source AVR/Arduino board by lily-osp

About the Quad tic timer PCB

Quad tic timer is an open source AVR/Arduino PCB design by lily-osp, published on GitHub. It is a 2-layer board measuring 30 × 30 mm, with 14 components from 11 distinct parts.

Its main chip is the ATtiny85, from the AVR/Arduino family. By type, the board carries 5 resistors, 4 diodes, 2 capacitors, 1 IC and 1 jumper.

From the project

Four synchronized phase-accurate pulse outputs from one pot (ATtiny85 firmware + 30x30mm KiCad 9 PCB)

A 30x30mm 2-layer KiCad 9 development board for the Quad-Tic-Timer firmware. Driven by an Atmel ATtiny85-20SU, it provides four synchronized phase-accurate pulse outputs scaled exponentially by a single precision 10-turn control pot.

Designed and verified using the pcb skill with full KiCad 9 headless tooling and production-ready JLCPCB fabrication deliverables.

Quad tic timer, from the project README
From the project README

Main components on the Quad tic timer

ATtiny85

Quad tic timer bill of materials (BOM)

14 components, 11 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATtiny85
U1
1
POT-SEL
JP1
1
10k
RV1
1
O1
D1
1
O2
D2
1
O3
D3
1
O4
D4
1
100n
C1
1
10n
C2
4
1k
R1, R2, R3, R4
1
10k
R5

Quad tic timer design files

The KiCad project lives in the lily-osp/quad-tic-timer repository on GitHub; these links point at the commit this page was built from.

Quad tic timer: common questions

What microcontroller does the Quad tic timer use?

The Quad tic timer is built around the ATtiny85, from the AVR/Arduino family.

How big is the Quad tic timer PCB?

The Quad tic timer measures 30 × 30 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Quad tic timer?

14 components, from 11 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 Quad tic timer design files?

From the lily-osp/quad-tic-timer 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 Quad tic timer design in my own project?

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

Can I test firmware for the Quad tic timer 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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