Finder 15.21.9.024.B200 – 15 Series YESLY – Dimmer

Why Choose the Finder 15.21.9.024.B200 YESLY Bluetooth LED Strip Dimmer?

The Finder 15.21.9.024.B200 is a compact Bluetooth PWM dimmer for 12–24 V DC LED strips, designed to deliver intelligent, flexible lighting control through the Finder YESLY smart home system. Combining low-voltage LED dimming with Bluetooth Low Energy technology, this electronic dimmer provides a convenient way to adjust lighting brightness using compatible smartphones, wireless push-buttons or a conventional wired push-button.

With a maximum output current of 8 A, the Finder 15.21.9.024.B200 supports LED strip loads of up to 96 W at 12 V DC or 192 W at 24 V DC. Its pulse-width modulation (PWM) technology regulates the brightness of compatible constant-voltage LED strips without requiring a separate phase-cut dimmable driver.

Part of the Finder 15 Series, this YESLY Bluetooth dimmer is suitable for installation inside a recessed wall box or appropriate electrical enclosure. Its compact dimensions of approximately 43 × 44.1 × 21.9 mm make it a practical solution for discreet lighting control in residential properties, hospitality environments, commercial interiors and architectural lighting installations.

The dimmer also offers configurable PWM frequency, brightness memory, adjustable minimum brightness and a restore-after-power-failure function. Integrated protection against over-temperature, overload, short circuits and reverse polarity adds further functionality for professionally designed low-voltage lighting systems.

Whether installing LED strip lighting beneath kitchen cabinets, around architectural features or within decorative lighting systems, the Finder 15.21.9.024.B200 Bluetooth LED strip controller provides a versatile solution for modern smart lighting projects.

Key Advantages

• Genuine Finder 15.21.9.024.B200 YESLY Bluetooth dimmer.
• Designed specifically for 12–24 V DC constant-voltage LED strips.
• 8 A maximum output current for suitable low-voltage lighting circuits.
• Supports up to 96 W at 12 V DC.
• Supports up to 192 W at 24 V DC.
• PWM dimming technology for smooth brightness adjustment.
• Bluetooth Low Energy connectivity for wireless lighting control.
• Compatible with the Finder YESLY smart home ecosystem.
• Can be configured and controlled through the Finder YOU app.
• Supports compatible Finder wireless push-buttons and conventional wired push-buttons.
• Adjustable PWM frequency from 250–1000 Hz.
• Configurable brightness memory and minimum brightness level.
• Restore-after-power-failure functionality.
• Soft switching for comfortable lighting transitions.
• Compact design suitable for recessed wall box mounting.
• Integrated protection against over-temperature, overload, short circuits and reverse polarity.
• Suitable for decorative, architectural and smart home LED strip installations.

Key Features

• Finder 15.21.9.024.B200 Bluetooth PWM LED strip dimmer.
• Part of the Finder 15 Series YESLY lighting control range.
• Single-channel LED strip dimming output.
• Rated supply voltage: 12–24 V DC.
• Operating voltage range: 10.8–26.4 V DC.
• Maximum output current: 8 A.
• Maximum output power at 12 V DC: 96 W.
• Maximum output power at 24 V DC: 192 W.
• Designed for compatible constant-voltage LED strip lighting.
• PWM brightness regulation.
• Configurable PWM operating frequency.
• Default PWM frequency: 250 Hz.
• Maximum configurable PWM frequency: 1000 Hz.
• Bluetooth Low Energy wireless communication.
• Encrypted wireless connection.
• Approximately 10 m Bluetooth range in unobstructed free space.
• Compatible with Finder YOU and Finder Toolbox Plus applications.
• Supports compatible BEYON and Finder wireless push-buttons.
• Supports conventional wired momentary push-button control.
• Configurable brightness memory.
• Adjustable minimum brightness threshold.
• Configurable lighting scenario transition time.
• Restore-after-blackout function.
• Integrated over-temperature protection.
• Integrated overload and short-circuit protection.
• Integrated reverse-polarity protection.
• Flush mounting in a suitable recessed electrical box.

How PWM Dimming Works with 12–24 V LED Strips

The Finder 15.21.9.024.B200 uses pulse-width modulation to control the brightness of compatible low-voltage LED strips. PWM dimming works by rapidly switching the LED output on and off while varying the proportion of time that the output remains energised.

When the output remains on for a larger proportion of each switching cycle, the LEDs appear brighter. When the on-time is reduced, the perceived brightness decreases. This provides a practical way to regulate light output in compatible constant-voltage LED strip systems.

Unlike conventional mains phase-cut dimmers, the Finder 15.21.9.024.B200 operates directly within a 12–24 V DC lighting system. It must be connected to a suitable DC power supply rather than directly to the mains electrical supply.

The dimmer is designed for single-channel constant-voltage LED strips. It is not a dedicated RGB, RGBW or individually addressable LED strip controller, and it should not be used as a substitute for equipment designed to provide separate colour-control channels.

The device also allows the PWM operating frequency to be configured between 250 Hz and 1000 Hz. Adjusting this setting can help reduce visible flicker or stroboscopic effects in certain applications, particularly where lighting is used near cameras or video recording equipment.

Actual results depend on the LED strip, power supply, selected PWM frequency and camera settings. The configurable frequency provides useful flexibility, but it does not guarantee flicker-free performance in every filming environment.

Understanding the 8 A, 96 W and 192 W Ratings

The Finder 15.21.9.024.B200 has a maximum output current of 8 A. The maximum permissible power therefore depends on the operating voltage of the connected LED strip.

For example, a 12 V LED strip installation drawing 60 W would operate below the dimmer's 96 W maximum at that voltage, provided the strip and power supply are otherwise compatible.

Similarly, a 24 V LED strip installation drawing 120 W would operate below the 192 W maximum.

Important: The 192 W rating applies at 24 V DC. It does not mean that a 12 V LED strip installation can draw 192 W. At 12 V DC, the maximum rated load is 96 W.

The external DC power supply must be appropriately rated for the connected LED strip load. Cable sizing, voltage drop, installation temperature and the manufacturer's recommended design margins must also be considered.

Bluetooth Smart Lighting Control with Finder YESLY

The Finder YESLY system enables the 15.21.9.024.B200 to be controlled without requiring a conventional rotary dimmer switch.

Compatible smartphones can communicate with the dimmer using Bluetooth Low Energy. The Finder YOU app provides an interface for controlling and configuring supported YESLY lighting devices, while Finder Toolbox Plus offers additional configuration functionality for professional installers.

The dimmer can also be operated using compatible Finder wireless push-buttons, including designated BEYON and 013.B9 controls. These allow lighting control points to be positioned conveniently without requiring a separate control cable to every switch location.

A conventional wired momentary push-button can also be used. A short press switches the lighting on or off, while a longer press adjusts the brightness level.

The Bluetooth connection has a typical operating range of approximately 10 m in unobstructed free space. Reinforced concrete, metal structures, foil-backed insulation and other building materials may reduce the effective range.

Local Bluetooth operation does not require a separate gateway. For supported remote access and voice assistant integration, the installation may be extended using the appropriate Finder YESLY Gateway and compatible services.

Configurable Brightness Memory and Lighting Behaviour

The Finder 15.21.9.024.B200 includes several configurable functions designed to improve everyday LED strip lighting control.

The brightness memory function allows the dimmer to remember the selected light level when the output is switched off. When the lighting is switched on again, the previously selected brightness can be restored.

When brightness memory is disabled, each new on command establishes full brightness. This gives installers flexibility when configuring the lighting to suit different rooms or user preferences.

The minimum brightness threshold can also be adjusted. This is useful when an LED strip becomes unstable or appears to flicker at very low brightness settings.

The device also supports configurable lighting scenario transition times, allowing changes in brightness to occur more smoothly. This can improve the appearance of decorative lighting and help create comfortable transitions between different lighting scenes.

The restore-after-blackout function allows the installer to configure how the dimmer behaves when power returns following an interruption.

Installation and Electrical Safety Considerations

The Finder 15.21.9.024.B200 is designed for installation within a suitable recessed wall box or electrical enclosure. Its compact dimensions make it suitable for installations where space is limited, provided the enclosure offers adequate room for wiring and heat dissipation.

The dimmer requires an external 12–24 V DC power supply. It must not be connected directly to a 230 V AC mains supply.

Use a suitable regulated constant-voltage DC power supply with an output voltage matching the LED strip. A 12 V LED strip requires an appropriate 12 V DC supply, while a 24 V LED strip requires an appropriate 24 V DC supply.

The dimmer's maximum output current is 8 A. The combined current of all connected LED strips must remain within this limit, and the external power supply must be capable of delivering the required load.

The device includes protection against over-temperature, overload, short circuits and reverse polarity. These protection functions do not replace the need for correct wiring, suitable circuit protection or appropriate power supply selection.

Observe the manufacturer's polarity markings carefully when connecting the DC supply and LED strip. Incorrect polarity or unsuitable wiring can prevent correct operation or damage connected equipment.

The IP20 ingress protection rating makes the module suitable for appropriate indoor enclosures. It should not be installed where exposed to water, condensation or excessive dust without suitable additional protection.

Installation should be carried out by a competent person in accordance with Finder's wiring instructions and applicable electrical regulations. Always isolate the relevant supply before wiring, inspection or maintenance.

Finder 15.21.9.024.B200 vs Other Finder 15 Series Dimmers

The Finder 15.21.9.024.B200 is the appropriate choice when the installation uses 12 V or 24 V constant-voltage LED strips and requires PWM brightness control.

The Finder 15.21.8.230.B300 is designed for compatible 230 V AC dimmable lighting and uses phase-cut dimming rather than low-voltage PWM output.

These products are not interchangeable. Selecting the correct dimmer depends on the lighting supply voltage, LED driver arrangement, dimming technology and connected load.

Typical Applications

• Finder YESLY smart home LED strip installations.
• 12 V DC decorative LED strip lighting.
• 24 V DC architectural LED strip lighting.
• Kitchen under-cabinet LED lighting.
• Bedroom ambient lighting.
• Living room feature lighting.
• LED strip lighting within shelving and furniture.
• Commercial display and retail lighting.
• Hotel bedroom and hospitality lighting.
• Restaurant and café decorative lighting.
• Reception areas and office feature lighting.
• Architectural coving and concealed lighting.
• Media rooms and entertainment spaces.
• Low-voltage lighting installations requiring wireless control.
• Smart lighting projects using compatible Finder wireless push-buttons.
• Applications requiring adjustable brightness memory and lighting scene transitions.