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Annahsingh clock

Annah03·annahsingh-clock·Annahs_clock_hps/Annahs_clock_hps.kicad_pcb

Annahsingh clock PCB layout, top view — open source AVR/Arduino board by Annah03

About the Annahsingh clock PCB

Annahsingh clock is an open source AVR/Arduino PCB design by Annah03, published on GitHub. It is a 2-layer board measuring 140 × 90 mm, with 69 components from 28 distinct parts.

Its main chip is the ED281DT, from the AVR/Arduino family. Other key parts include the A 08-LC-TT, ED241DT, L7805CDT-TR and SC56-11EWA. By type, the board carries 18 resistors, 16 test points, 12 capacitors, 6 switches, 5 ICs and 3 connectors.

Main components on the Annahsingh clock

A 08-LC-TTED241DTL7805CDT-TRSC56-11EWA

Annahsingh clock bill of materials (BOM)

69 components, 28 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
A 08-LC-TT
DS1307_DIP-8
U1
1
ED241DT
MAX7219
U2
1
L7805CDT-TR
L7805
U3
2
SC56-11EWA
U4, U5
1
CMPT3904E TR PBFREE
NPN_2N3904_SOT23
Q1
1
ECS-160-20-5PXDN-TR
Crystal_16MHz
Y1
1
Q 0,032768-JTX310-12,5-20-T1-HMR-50K-LF
Crystal_32768Hz
Y2
1
61300611121
Conn_01x06
J1
1
PJ-102AH
VAL**
J2
1
PRPC003DAAN-RC
Conn_02x03_Odd_Even
J3
1
BS-7
Battery_Cell
BT1
1
PS1420P02CT
Buzzer
BZ1
1
1447
TC1602A-01T
DS1
1
3386P-1-103TLF
R_POT_10K
RV1
6
B3FS-1000P
Omron_B3F_SPST
SW1, SW2, SW3, SW4, SW5, SW6
16
TestPoint
TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 +8
1
ED281DT
ATmega328-PU
UI1
1
150080RS75000
LED_0805
D1
8
08055C104KAT2A
C_0805_0.1uf
C1, C2, C3, C7, C8, C10, C11, C13
2
CC0805JRNPO9BN220
C_0805_22pf
C4, C5
Show 8 more
QtyPartRefs
1
CC0805KKX7R8BB105
C_0805_1uf
C6
1
GRM21BR61E106KA73L
C_0805_10uf
C9
5
RC0805FR-0710KL
R_0805_10K
R1, R2, R5, R8, R9
4
RC0805FR-0747RL
R_0805_47
R3, R4, R16, R17
2
RC0805FR-074K7L
R_0805_4.7K
R6, R7
1
RC0805FR-07100KL
R_0805_100K
R10
1
N/A
R_0805_2.2K
R11
5
RC0805FR-071KL
R_0805_1K
R12, R13, R14, R15, R18

Annahsingh clock design files

The KiCad project lives in the Annah03/annahsingh-clock repository on GitHub; these links point at the commit this page was built from.

Annahsingh clock: common questions

What microcontroller does the Annahsingh clock use?

The Annahsingh clock is built around the ED281DT, from the AVR/Arduino family.

How big is the Annahsingh clock PCB?

The Annahsingh clock measures 140 × 90 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Annahsingh clock?

69 components, from 28 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 Annahsingh clock design files?

From the Annah03/annahsingh-clock 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 Annahsingh clock design in my own project?

The repository has no license, so all rights stay with Annah03. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Annahsingh clock 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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