HardLabs

HKN-BetaPsi-DIY-Watch-Kit

jamusix99·HKN-BetaPsi-DIY-Watch-Kit·HW Design/Watch_TH.kicad_pcb

HKN-BetaPsi-DIY-Watch-Kit PCB layout, top view — open source AVR/Arduino board by jamusix99

About the HKN-BetaPsi-DIY-Watch-Kit PCB

HKN-BetaPsi-DIY-Watch-Kit is an open source AVR/Arduino PCB design by jamusix99, published on GitHub. It is a 2-layer board measuring 49.6 × 66 mm, with 21 components from 9 distinct parts.

Its main chip is the ATtiny85-20P, from the AVR/Arduino family. Other key parts include the TDCR1050M, 74AHCT595 and L78M05ABV. By type, the board carries 9 resistors, 5 ICs, 5 capacitors, 1 battery holder and 1 switch.

It belongs with the wearables designs in this gallery.

From the project

Buildable Watch designed to be hand-soldered and programmed with the code provided

Main components on the HKN-BetaPsi-DIY-Watch-Kit

TDCR1050M74AHCT595L78M05ABVATtiny85-20P

HKN-BetaPsi-DIY-Watch-Kit bill of materials (BOM)

21 components, 9 distinct parts.

QtyPartRefs
1
TDCR1050M
U1
2
74AHCT595
U2, U4
1
L78M05ABV
U3
1
ATtiny85-20P
U5
1
BH800S
BT1
1
SW_SPST
SW1
4
100n
C1, C2, C3, C5
1
330n
C4
9
1k
R1, R2, R3, R4, R5, R6, R7, R8 +1

HKN-BetaPsi-DIY-Watch-Kit design files

The KiCad project lives in the jamusix99/HKN-BetaPsi-DIY-Watch-Kit repository on GitHub; these links point at the commit this page was built from.

HKN-BetaPsi-DIY-Watch-Kit: common questions

What microcontroller does the HKN-BetaPsi-DIY-Watch-Kit use?

The HKN-BetaPsi-DIY-Watch-Kit is built around the ATtiny85-20P, from the AVR/Arduino family.

How big is the HKN-BetaPsi-DIY-Watch-Kit PCB?

The HKN-BetaPsi-DIY-Watch-Kit measures 49.6 × 66 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the HKN-BetaPsi-DIY-Watch-Kit?

21 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the HKN-BetaPsi-DIY-Watch-Kit design files?

From the jamusix99/HKN-BetaPsi-DIY-Watch-Kit repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the HKN-BetaPsi-DIY-Watch-Kit design in my own project?

The repository has no license, so all rights stay with jamusix99. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the HKN-BetaPsi-DIY-Watch-Kit 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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