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IKEA Frekvens LED spotlight "side-project"
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‎extra/ESPHome/IKEA-Frekvens-LED-spotlight/README.md‎

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# 💡 IKEA Frekvens LED spotlight
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> Article number 504.203.67
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## 📈 Schematics
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### PCB schema
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```text
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┌──────────────────────────────────┐
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│ ┌───────────────────┬────────┼─ Microphone
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0 V DC ─┼ DC- │ ┌───────┐ │ ┌─┐ │
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+4 V DC ─┼ DC+ │ │┌────┐ │ │ ┤ ├ │
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│ │ U2 ││ │ │ │ ┤ ├ │
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│ │ ┌┴┴┴┴┐ │ │ U3 └─┤ ├ │
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│ │ └┬┬┬┬┘ │ │ LM358 ┤ ├ │
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│ └────┘ │ │ └─┘ │
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Enable ─┼────────┬───────┤ └─────┬───────┬─┼─ Button
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│ │ ┌─┐ │ ┌─┐ │ ┌─┐ │ │
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│ │ ┤ ├ │ ┤ ├ │ ┤ ├ │ │
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│ │ ┤ ├ │ ┤ ├ └──┤ ├──┘ │
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│ └──┤ ├ └──┤ ├ K3 └─┘ │
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│ U6 ┤ ├ U7 ┤ ├ │
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│ └─┘ └─┘ MIC- │
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│ LED+ LED- MIC+ ┼─ Signal
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└───────┼──────────────────────────┘
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LED ─────────┘
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```
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### Microphone schema
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```text
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┌─────┐
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│ VCC ├─ Signal
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│ GND ├─ 0 V DC
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└─────┘
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```
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### LED diode schema
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```text
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┌────────┐
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│ Anode ├─ +4 V DC
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│ Catode ├─ LED
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└────────┘
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```
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### Power supply schema
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```text
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┌──────┐
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100-240 V AC ─┤ L + ├─ +4 V DC
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Neutral ─┤ N - ├─ 0 V DC
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└──────┘
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```
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### ESP32 schema
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```text
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┌────────────────┐
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│ VIN ├─ +4 V DC
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│ GND ├─ 0 V DC
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│ │
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│ PWM output ├─ Enable
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│ │
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│ Digital input ├─ Button
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│ │
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│ Analog input ├─ Microphone
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└────────────────┘
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```
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## 🚀 Getting started
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Remove the `U2` chip, then connect each component to the ESP32 using wires.
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Refer to the [PCB schema](#pcb-schema) above for the internal connections of each component on the board — this allows you to solder the wire to any convenient point on the PCB.
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## 🔧 Configuration
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### Power and ground
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> To prevent backfeeding, never connect the ESP32 to USB while the 4 V power supply is connected — even if it is unplugged from the mains.
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### Enable
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Use any *PWM output* pin.
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> Avoid strapping pins as this pin may be floating.
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### Button
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Use any *digital input* pin, preferably those that are also RTC-capable, to allow deep sleep wake-up functionality.
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> Avoid strapping pins as this pin is pulled *HIGH* using a resistor and *LOW* when pressed.
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### Microphone
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Use any *analog input* pin.
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> Avoid strapping pins as this pin is biased.

‎extra/ESPHome/IKEA-Frekvens-LED-spotlight/esphome.yaml‎

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# Source: https://github.com/VIPnytt/Frekvens/tree/main/extra/ESPHome/IKEA-Frekvens-LED-spotlight
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esphome:
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name: frekvens-spotlight
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friendly_name: "Frekvens spotlight"
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comment: "IKEA Frekvens LED spotlight"
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min_version: "2025.7.0"
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esp32:
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board: seeed_xiao_esp32c3 # Replace with the board you are using
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substitutions:
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PIN_LED: 3 # PWM output to LED drivers (U6/U7)
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PIN_MIC: 4 # Analog input from microphone (U3)
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PIN_SW1: 5 # Digital input from button (K3)
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api:
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# Optional: enable encryption if desired
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#encryption:
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#key: !secret api_key
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# Optional: disable automatic reboot on API disconnect
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#reboot_timeout: 0s
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# Optional: enables configuration via captive portal during setup
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#captive_portal:
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logger: # Enables logging to aid in debugging
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level: INFO # Set desired log level
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ota:
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- platform: esphome
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# Optional: secure OTA with a password
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#password: !secret ota_password
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web_server: # Optional: enable a basic web interface
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wifi:
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ssid: !secret wifi_ssid # Wi-Fi network name
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password: !secret wifi_password # Wi-Fi password
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# Optional: configure fallback access point
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#ap:
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#password: !secret ap_password
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binary_sensor:
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- platform: gpio
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id: sw1
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name: "Button"
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icon: "mdi:power"
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disabled_by_default: True # Hidden from Home Assistant UI
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internal: True # Optional
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pin:
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number: ${PIN_SW1}
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allow_other_uses: true
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filters:
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- invert
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on_click:
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- max_length: 499ms # Short press: toggle light
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then:
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- light.toggle: led
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# Optional: trigger event in Home Assistant
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#- homeassistant.event:
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#event: esphome.button_short_press
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on_multi_click:
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- timing:
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- ON for at least 500ms # Long press: enter dimming mode
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then:
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# Optional: trigger event in Home Assistant
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#- homeassistant.event:
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#event: esphome.button_long_press
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- while:
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condition:
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binary_sensor.is_on: sw1
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then:
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- if:
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condition:
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lambda: !lambda 'return id(dim_up);'
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then:
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- light.dim_relative:
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id: led
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relative_brightness: 1%
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transition_length: 0s
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else:
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- light.dim_relative:
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id: led
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relative_brightness: -1%
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transition_length: 0s
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- delay: 20ms
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- globals.set:
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id: dim_up
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value: !lambda 'return !id(dim_up);'
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button:
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- platform: template
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name: "Power off"
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icon: "mdi:power"
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entity_category: config
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on_press:
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then:
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- deep_sleep.enter # Enter deep sleep to save power
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- platform: restart
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id: reboot
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name: "Reboot"
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disabled_by_default: True # Hidden from UI unless enabled
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deep_sleep:
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wakeup_pin:
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number: ${PIN_SW1}
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inverted: True
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allow_other_uses: True
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globals:
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- type: bool
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id: dim_up
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restore_value: True # Remembers dimming direction between restarts
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- type: float
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id: mic_peak
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restore_value: False # Temporary peak value, resets every interval
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initial_value: '0'
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- type: int
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id: mic_last
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restore_value: True # Stores last microphone reading for diff calc
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- type: int
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id: mic_threshold
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initial_value: '512'
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restore_value: True # Threshold for triggering sound response
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interval:
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- interval: 60s
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then:
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- sensor.template.publish:
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id: mic_level
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state: !lambda 'return id(mic_peak);'
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- lambda: !lambda |-
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id(mic_peak) = 0;
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light:
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- platform: monochromatic
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id: led
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name: None
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icon: "mdi:spotlight"
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restore_mode: RESTORE_DEFAULT_OFF
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output: led_pwm
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effects: # Optional light effects
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- flicker:
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- pulse:
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- random:
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number:
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- platform: template
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id: threshold
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name: "Threshold"
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icon: "mdi:microphone"
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entity_category: config
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disabled_by_default: True
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mode: box
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step: 1
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max_value: 4095
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min_value: 1
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lambda: !lambda 'return id(mic_threshold);'
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set_action:
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- lambda: |-
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id(mic_threshold) = (int)x;
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id(threshold).publish_state(id(mic_threshold));
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output:
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- platform: ledc
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id: led_pwm
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pin: ${PIN_LED}
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frequency: ${80000000 / 65536 | int} # Max resolution (12-bit)
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min_power: ${1 / 255}
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zero_means_zero: True # Ensures 0% = fully off
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script:
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- id: on_sound
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then: # Response to detected sound event
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- light.toggle:
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id: led
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transition_length: 750ms
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- delay: 750ms
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- light.toggle:
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id: led
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transition_length: 750ms
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- delay: 750ms
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sensor:
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- platform: adc
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id: mic_raw
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pin: ${PIN_MIC}
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raw: True
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attenuation: 12db
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samples: 10
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update_interval: 10ms
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unit_of_measurement: ""
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accuracy_decimals: 0
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filters:
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- max:
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send_every: 10
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window_size: 10
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- lambda: !lambda |-
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if (id(mic).state)
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{
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int diff = abs((int)x - id(mic_last));
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id(mic_last) = (int)x;
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return diff;
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} else {
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return 0;
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}
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- delta: 1.0
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on_value:
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then:
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- if:
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condition:
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lambda: !lambda 'return x >= (int)id(threshold).state;'
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then:
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- script.execute: on_sound
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- lambda: !lambda |-
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if (x > id(mic_peak)) {
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id(mic_peak) = x;
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}
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- platform: internal_temperature
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name: "Internal temperature"
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disabled_by_default: True
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- platform: template
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id: mic_level
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name: "Sound level"
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icon: "mdi:microphone"
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entity_category: diagnostic
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state_class: measurement
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accuracy_decimals: 0
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update_interval: never
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lambda: !lambda |-
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return id(mic_peak);
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- platform: wifi_signal
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name: "Wi-Fi signal"
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switch:
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- platform: template
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id: mic
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name: "Microphone"
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icon: "mdi:microphone"
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entity_category: config
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restore_mode: RESTORE_DEFAULT_OFF
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optimistic: True

‎extra/README.md‎

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> Optional tools, scripts, and resources that serve as non-essential, supplemental, or auxiliary content.
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## 🏠 ESPHome
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Side-projects, primarily for other devices in the [IKEA Frekvens](https://github.com/VIPnytt/Frekvens/wiki/IKEA-Frekvens) and [IKEA Obegränsad](https://github.com/VIPnytt/Frekvens/wiki/IKEA-Obegransad) collections.
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## 🐍 Python
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Utilities that are not part of the core functionality but may be useful to advanced users or contributors.

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