HardLabs

SimpleClock

mwwhited·EmbeddedBakery·circuits/SimpleClock/SimpleClock/SimpleClock.kicad_pcb

SimpleClock PCB layout, top view — open source AVR/Arduino board by mwwhited

About the SimpleClock PCB

SimpleClock is an open source AVR/Arduino PCB design by mwwhited, published on GitHub under the MIT license. It is a 2-layer board measuring 215.9 × 177.8 mm, with 31 components from 10 distinct parts.

Its main chip is the ATtiny2313-20P, from the AVR/Arduino family. Other key parts include the KW4-56NCWB-P-Y. By type, the board carries 20 resistors, 5 switches, 2 ICs, 2 connectors and 2 capacitors.

From the project

Collection of arduino, avr and pic projects

Designed and programmed by Matthew Whited 2023-01-01. This is a simple clock build around the ATTiny2313.

Internal Clock Source Code Schematic (pdf) External Clock Source Code Schematic (pdf)

SimpleClock, from the project README
From the project README

Main components on the SimpleClock

ATtiny2313-20PKW4-56NCWB-P-Y

SimpleClock bill of materials (BOM)

31 components, 10 distinct parts.

QtyPartRefs
1
ATtiny2313-20P
U1
1
KW4-56NCWB-P-Y
U2
1
Screw_Terminal_01x02
J1
1
AVR-ISP-6
J2
1
SW_SPDT
SW1
4
SW_Push
SW2, SW3, SW4, SW5
1
100nF
C1
1
33uF
C2
1
10k
R1
19
470
R2, R3, R4, R5, R6, R7, R8, R9 +11

SimpleClock design files

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

SimpleClock: common questions

What microcontroller does the SimpleClock use?

The SimpleClock is built around the ATtiny2313-20P, from the AVR/Arduino family.

How big is the SimpleClock PCB?

The SimpleClock measures 215.9 × 177.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SimpleClock?

31 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the SimpleClock design files?

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

Can I use the SimpleClock design in my own project?

Yes, under the terms of its MIT license, which mwwhited chose for the repository.

Can I test firmware for the SimpleClock 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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