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2 layers131.2 × 21 mmChaklock, the printed circuit board in 3D

A LED based clock that runs on the ESP8266 microcontroller. The 12 numbers light up depending on the time (approximation of 5 min), while the main 9 segment "picture" includes a color fade

Size
131.2 × 21 mm
Copper layers
2
Thickness
1.6 mm
Parts
52
Nets
38
Pads
152
Tracks, vias
325, 30
Pours
2
Routed
Yes
KiCad
KiCad 6 (file 20211014)
Created
26 Dec 2021
Updated
28 May 2026

Overview

Chaklock is an open-source printed circuit board by davidzindovic, from the davidzindovic/Chaclock repository on GitHub. It is a 2-layer board of 131.2 × 21 mm with 52 parts on 38 nets, routed with 325 tracks and 30 vias.

It is built around the ESP-12E, LM1117-3.3 and WS2812B. Its parts include 19 connectors, 9 diodes, 5 resistors, 2 capacitors and 2 ICs. It belongs with the ESP8266 boards of this library.

Main components

3

README

README.md

Ambiental-Clock

A LED based clock that runs on the ESP8266 microcontroller. The 12 numbers light up depending on the time (approximation of 5 min), while the main 9 segment "picture" includes a color fade depending on the time of day. The code includes a sleep mode , which resets the uC entirely in order to prevent the timer overflow. (in order to prevent any visible change upon reset - since it will most likely happen during the night) The clock fades on sometime during the morning and fades off at a certain point during nightime.

The colors and silhuette are meant to simbolize a meditating person, relating to chakras - hence the name Chaclock.

ChaClock

ChaClock

Parts

52
QtyValueFootprintReferences
12Conn_01x03_MaleConnector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_VerticalJ1, J2, J3, J4, J6, J7, J8, J9, J10, J11, J12, J13
9Jumper_2_OpenJumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mmJP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8, JP9
9WS2812BLED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mmD1, D2, D3, D4, D5, D6, D7, D8, D9
6Edge_Solder_padMy Library:Edge Solder padJ14, J15, J16, J17, J18, J19
6MountingHole_2.1mmMountingHole:MountingHole_2.1mmФ 2mm, Ф 2mm, Ф 2mm, Ф 2mm, Ф 2mm, Ф 2mm
410kResistor_SMD:R_0805_2012MetricR1, R2, R3, R4
210uCapacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mmC1, C2
1220EResistor_SMD:R_0805_2012MetricR5
1Conn_01x06_FemaleConnector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_VerticalJ5
1ESP-12ERF_Module:ESP-12EU1
1LM1117-3.3Package_TO_SOT_SMD:TO-252-3_TabPin2U2

Questions

How big is the Chaklock PCB?

It measures 131.2 × 21 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Chaklock use?

52 parts, built around the ESP-12E, LM1117-3.3 and WS2812B. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Chaklock KiCad files?

From the davidzindovic/Chaclock repository on GitHub, at the commit this page was made from: the board is PCB/Chaklock.kicad_pcb and its schematic PCB/Chaklock.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Chaklock design in my own project?

Its repository states no licence, so its author keeps all rights: ask davidzindovic before reusing the design.

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