4 layers33 × 31.9 mm Touch sensor light, the printed circuit board in 3D

Touch sensor light

A small PCB with a capacitive touch sensor IC and 2 1W LEDs. I use them to embed in 3d-printed lithophane lamps, see

Size: 33 × 31.9 mm
Copper layers: 4
Thickness: 4.69 mm
Parts: 24
Nets: 17
Pads: 69
Tracks, vias: 96, 36
Pours: 4
Routed: Yes
KiCad: KiCad 6 (file 20211014)
Created: 7 Sep 2023
Updated: 7 Sep 2023

Overview

Touch sensor light is an open-source printed circuit board by gabeak2, from the gabeak2/Touch_Sensor_Lamp repository on GitHub. It is a 4-layer board of 33 × 31.9 mm with 24 parts on 17 nets, routed with 96 tracks and 36 vias.

It is built around the ATTINY412-SSN, TTP223-TD and PZT2222A. Its parts include 6 connectors, 5 resistors, 4 capacitors, 2 ICs and 2 diodes. It belongs with the sensors and measurement boards and the AVR (ATmega, ATtiny) boards of this library.

Main components

README

README.md

Touch_Sensor_Lamp

A small PCB with a capacitive touch sensor IC and 2 1W LEDs. I use them to embed in 3d-printed lithophane lamps, see

https://www.youtube.com/shorts/fURaeRKdgpU

Parts

Qty	Value	Footprint	References
4	10	Resistor_SMD:R_1206_3216Metric	R1, R2, R4, R5
4	MountingHole	MountingHole:MountingHole_2.2mm_M2	H1, H2, H3, H4
2	100n	Capacitor_SMD:C_0805_2012Metric	C1, C2
2	Conn_01x01	Connector_PinSocket_2.54mm:PinSocket_1x01_P2.54mm_Vertical	J4, J6
2	Conn_01x03	Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical	J2, J3
2	LED	LED_SMD:LED_1W_3W_R8	D1, D2
1	220	Resistor_SMD:R_0805_2012Metric	R3
1	470n	Capacitor_SMD:C_0805_2012Metric	C4
1	47p	Capacitor_SMD:C_0805_2012Metric	C3
1	ATtiny412-SS	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U1
1	Conn_01x02	Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical	J1
1	PZT2222A	Package_TO_SOT_SMD:SOT-223-3_TabPin2	Q1
1	TTP223	Package_TO_SOT_SMD:SOT-23-6	U2
1	USB_B_Micro	Connector_USB:USB_Micro-B_Molex-105017-0001	J5

Questions

How big is the Touch sensor light PCB?

It measures 33 × 31.9 mm and has 4 copper layers, 4.69 mm thick.

What parts does the Touch sensor light use?

24 parts, built around the ATTINY412-SSN, TTP223-TD and PZT2222A. 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 Touch sensor light KiCad files?

From the gabeak2/Touch_Sensor_Lamp repository on GitHub, at the commit this page was made from: the board is touch_sensor_light.kicad_pcb and its schematic touch_sensor_light.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Touch sensor light design in my own project?

Its repository states no licence, so its author keeps all rights: ask gabeak2 before reusing the design.

Category and platform

Sensors and measurement AVR (ATmega, ATtiny)

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/gabeak2-touch-sensor-lamp" title="Touch sensor light in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/gabeak2-touch-sensor-lamp.jpg" alt="Touch sensor light" width="1200" height="900">

A picture that opens the board, for a README

[![Touch sensor light](https://pcbkit.io/embed/boards/gabeak2-touch-sensor-lamp.jpg?size=s)](https://pcbkit.io/boards/gabeak2-touch-sensor-lamp)

Source

Repository: gabeak2/Touch_Sensor_Lamp
Board file: touch_sensor_light.kicad_pcb
Commit: 97afa1b
Licence: Not stated

Similar boards

2 layers50.5 × 128.5 mm
OpenThereminV45
GaudiLabs/OpenThereminV4
Open Source Theremin Instrument
107 parts249GPL-3.0
2 layers84.2 × 100 mm
Fabpack out v5 8
yuz207/agentpad13
agentpad13 — open-source 13-key macropad for agentic work (RP2040, vial-qmk, planar joystick, Raw HID agent-status protocol)
126 parts41
2 layers226.6 × 74.2 mm
Sr42-udk hotswap
Tecsmith/sr42-keyboard-pcb
SR42 high-speed 40% keyboard
177 parts1
2 layers61 × 37.1 mm
Touch button tester
TimGoll/pcb_touch_test
For an upcoming project I wanted to test how to implement PCB touch pads. The easiest solution that I could find was to use the TTP223 IC. All in all the design was pretty easy and straightforward.
21 parts1
2 layers20.6 × 28 mm
TouchUNIT
akita11/TouchUNIT

18 partsMIT
2 layers
Bomboniera Tesi
Borval99/BombonieraElettronica
Bomboniera Elettronica realizzata con PCB
27 parts
2 layers59.5 × 27 mm
Desk lamp cc2530
Czubixx/zigbee-desk-lamp
DIY Zigbee desk lamp based on CC2530 controllable smart light for workbench/desk use.
28 parts
6 layers250.3 × 123.8 mm
RGBMatrix
KuruczKende/RGBMatrix
Links to components: Shift Register: https://www.lcsc.com/product-detail/C45333837.html Resistor document: https://www.lcsc.com/datasheet/C1731305.pdf RGB Leds…
566 parts