This is a home assistant controlled CWWW desk lamp with capacitive touch buttons, made with ESPHome and ESP32-C3.
I made this project as I wanted to learn more about capacitive touch sensors and how to use them with ESPHome. I also wanted to make a simple desk lamp that could be controlled with Home Assistant.
- Capacitive touch buttons to control the brightness and color temperature of the LEDs.
- Home Assistant integration.
Final Build:
Case/Assembly
Main Schematic
Main PCB
LED Schematic
LED PCB
| Index | Part Number | What the item is for in your project | Description | Pack Quantity | ID | Unit Price | Total Price | Total (incl. VAT shipping, etc) |
|---|---|---|---|---|---|---|---|---|
| 1 | IQS7222A001QNR | Capacitive sensor | 9 CHANNEL MUTUAL / 8 SELF-CAPAC | 2 | 1790-IQS7222A001QNRCT-ND | 0.82 | 1.64 | ~140$ |
| 2 | ESP32-C3-WROOM-02-H4 | MCU | RF TXRX MOD BT WIFI PCB TH SMD | 1 | 1965-ESP32-C3-WROOM-02-H4CT-ND | 3.51 | 3.51 | |
| 3 | IRM-20-24 | PSU | AC/DC CONVERTER 24V 22W | 1 | 1866-3040-ND | 9.20 | 9.20 | |
| 4 | AP63203WU-7 | 3.3V buck | IC REG BUCK 3.3V 2A TSOT23-6 | 2 | AP63203WU-7DICT-ND | 0.71 | 1.42 | |
| 5 | AL5802-7 | Led driver | IC LED DRVR LIN PWM 120MA SOT26 | 5 | AL5802-7DICT-ND | 0.23 | 1.15 | |
| 6 | 2N7002 | mosfet to drive the led drivers | MOSFET N-CH 60V 280MA SOT23-3 | 3 | 4878-2N7002CT-ND | 0.12 | 0.36 | |
| 7 | GW JTLPS1.CM-HNKK-XX510-1-150-R33 | 2200K led | LED DURIS E2835 WHT 2200K 2835 | 10 | 475-GWJTLPS1.CM-HNKK-XX510-1-150-R33CT-ND | 0.067 | 0.67 | |
| 8 | GW JTLPS1.CM-JNKN-XX51-1-150-R33 | 6500K led | LED DURIS E2835 WHITE 6500K 2835 | 10 | 475-GWJTLPS1.CM-JNKN-XX51-1-150-R33CT-ND | 0.067 | 0.67 | |
| 9 | SRR5018-3R9Y | inductor | FIXED IND 3.9UH 2A 55 MOHM SMD | 2 | 118-SRR5018-3R9YCT-ND | 0.64 | 1.28 | |
| 10 | 12mm LED Gooseneck | 12mm LED Gooseneck | 30 cm silver, Outer M10 – Outer M10 | 1 | https://es.aliexpress.com/item/1005007938186623.html | 11.50 | 11.50 | |
| 11 | 703W-00/53 | Power Connector | PWR ENT RCPT IEC320-C14 PNL SLDR | 1 | Q219-ND | 1.54 | 1.54 | |
| 12 | MF72-005D7 | Inrush current limiter | ICL 5 Ω 20% 2A 9 mm | 2 | 317-1148-ND | 0.43 | 0.86 | |
| 13 | M3x30 mm 4762 | M3x30 mm 4762 | M3x30 mm 4762 | 1 | https://www.aliexpress.com/item/1005006453614010.html | 3.105 | 3.105 | |
| 14 | M10 nut | M10 nut | M10 nut | 1 | https://www.aliexpress.com/item/1005007593861199.html | 3.0935 | 3.0935 | |
| 15 | Soldering iron heatset insert tips | Soldering iron heatset insert tips | Soldering iron heatset insert tips | 1 | https://www.aliexpress.com/item/1005008493831823.html | 21.3785 | 21.3785 | |
| 16 | M3x6 mm 4762 | M3x6 mm 4762 | M3x6 mm 4762 | 1 | https://www.aliexpress.com/item/1005006453614010.html | 2.139 | 2.139 | |
| 17 | Wood Filament | Wood Filament | Wood Filament | 0 | https://www.aliexpress.com/item/1005006685394618.html | 38.1685 | 0 | |
| 18 | 30 cm JST XH 4P | 30 cm JST XH 4P | 30 cm JST XH 4P | 1 | https://www.aliexpress.com/item/1005008319201640.html | 2.5645 | 2.5645 | |
| 19 | CL10A104KA8NNNC | Passive | CAP CER 0.1 µF 25 V X5R 0603 | 10 | 1276-1857-1-ND | 0.028 | 0.28 | |
| 20 | CL10A475KQ8NNNC | Passive | CAP CER 4.7 µF 6.3 V X5R 0603 | 10 | 1276-1045-1-ND | 0.008 | 0.08 | |
| 21 | CL10A225KQ8NNNC | Passive | CAP CER 2.2 µF 6.3 V X5R 0603 | 10 | 1276-1183-1-ND | 0.032 | 0.32 | |
| 22 | CL10A226MQ8NRNC | Passive | CAP CER 22 µF 6.3 V X5R 0603 | 5 | 1276-1193-1-ND | 0.22 | 1.10 | |
| 23 | CL10A104KA8NNNC | Passive | CAP CER 0.1 µF 25 V X5R 0603 | 10 | 1276-1857-1-ND | 0.028 | 0.28 | |
| 24 | CL05C101JB5NNNC | Passive | CAP CER 100 pF 50 V C0G/NP0 0402 | 10 | 1276-1025-1-ND | 0.003 | 0.03 | |
| 25 | 61300411121 | Passive | CONN HEADER VERT 4POS 2.54 mm | 2 | 732-5317-ND | 0.17 | 0.34 | |
| 26 | CRCW0603470MJPEAHR | Passive | RES SMD 470 MΩ 5% 1/10 W 0603 | 10 | 541-470MAHCT-ND | 0.151 | 1.51 | |
| 27 | RC0603FR-074K7L | Passive | RES 4.7 KΩ 1% 1/10 W 0603 | 10 | 311-4.70KHRCT-ND | 0.009 | 0.09 | |
| 28 | RC0603FR-071KL | Passive | RES 1 KΩ 1% 1/10 W 0603 | 10 | 311-1.00KHRCT-ND | 0.009 | 0.09 | |
| 29 | RC0603FR-0710KL | Passive | RES 10 KΩ 1% 1/10 W 0603 | 10 | 311-10.0KHRCT-ND | 0.009 | 0.09 | |
| 30 | PTS815SJM250SMTRLFS | Esp32 buttons | SWITCH TACTILE SPST-NO 0.05 A 12 V | 4 | CKN12215-1-ND | 0.22 | 0.88 | |
| 31 | PCB | PCB | PCBs + stencil | 1 | jlcpcb.com | 53.03 | 53.03 | |
| 32 | ERJ-6GEY0R00V | 0 ohm jumper | RES SMD 0 OHM JUMPER 1/8W 0805 | 20 | P0.0ACT-ND | 0.02360 | 0.59 |
Remember to set your secrets in secrets.yaml.
All firmware configuration lives in code.yaml: PS: This configuration is for reference only, The final configuration will be for the ESP32-S2. You'll also have to configure the devices you want to control in Home Assistant..
esphome:
name: desklight
friendly_name: desklight
esp32:
board: esp32-c3-devkitm-1
framework:
type: arduino
# Enable logging
logger:
# Enable Home Assistant API
api:
encryption:
key: !secret api_key
ota:
- platform: esphome
password: !secret ota_password
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "desklight Fallback Hotspot"
password: "wHjqyQOLnaPa"
i2c:
sda: GPIO6
scl: GPIO7
frequency: 800kHz
scan: true
mpr121:
id: mpr121_component
address: 0x5A
touch_debounce: 1
release_debounce: 1
touch_threshold: 10
release_threshold: 7
binary_sensor:
- platform: mpr121
id: touch_key0
channel: 0
name: "Touch Key 0"
touch_threshold: 12
release_threshold: 6
light:
- platform: cwww
name: "Livingroom Lights"
cold_white: WLight
warm_white: CLight
cold_white_color_temperature: 6500 K
warm_white_color_temperature: 2200 K
constant_brightness: true
output:
- platform: ledc
id: WLight
pin: GPIO4
frequency: 1000 Hz
- platform: ledc
id: CLight
pin: GPIO5
frequency: 1000 Hz
captive_portal: