OONO Blinking Flasher Module DC 4.5–30V 10A Normally Open — Adjustable ON/OFF Timing

The OONO DC 4.5–30V 10A Blinking Flasher Module is a compact, adjustable normally-open relay that produces repeatable ON/OFF pulses for DC loads up to 10 A.

This compact electronic module lets you create timed blink or flash sequences for LED lamps, hazard lights, beacons, signage and other DC-driven devices without complex programming. It runs from a wide DC range (4.5–30 V), supports resistive and mildly inductive loads, and features separate, precise adjustments for ON and OFF duration so you can fine-tune the flash pattern for visibility and power considerations.

How do I set the ON and OFF durations?

Two 25-turn potentiometers on the PCB control the ON and OFF intervals independently, giving you a broad range of pulse timing. Use a small screwdriver to make small, precise changes until the flash cadence meets your needs.

• Time-ON adjustable from 0.01 to 15 seconds
• Time-OFF adjustable from 0.01 to 15 seconds
• 25-turn pots for fine, repeatable adjustments
• LED status indicator shows output state while tuning

What loads and voltages can this module handle?

The module operates on DC supply voltages between 4.5 and 30 V and is rated for a continuous switching current up to 10 A. Make sure your load stays within wattage limits at the chosen supply voltage to avoid overloading the module.

• Operating voltage: DC 4.5–30 V
• Maximum current: 10 A
• Max load: 120 W at 12 V, 300 W at 30 V
• Designed for resistive and lightly inductive loads (LEDs, bulbs, beacons)

How do I mount and wire the flasher module?

The module comes in a compact plastic case with pre-wired leads for easy connection and two screw holes for secure mounting. Electrical connections are straightforward: connect your DC supply to the input leads and the load to the output (normally open) contact following polarity and safety best practices.

• Compact plastic enclosure with mounting holes for quick installation
• Pre-attached wires for simple hookup—no soldering required
• LED output indicator for confirming operation after wiring
• Note: module does not provide voltage conversion — use only with DC supplies

Is this module suitable for automotive or outdoor signaling?

Yes, its wide input range and 10 A capacity make it useful for many vehicle and outdoor signaling tasks, provided the load type and environmental protection are appropriate. It’s ideal for auxiliary hazard lights, warning beacons and temporary signage, though you should protect the module from direct moisture and excessive vibration when used outdoors.

• Useful for vehicle lights, warning beacons and safety signs
• Wide 4.5–30 V range matches most automotive and DC systems
• Protect from water and heavy vibration for long-term reliability
• Not a step-up/step-down converter—must use suitable DC source

Who is this for? The OONO blinking flasher module is aimed at hobbyists, electricians and technicians who need a simple, adjustable timing relay for DC lighting and signaling. It’s also a good choice for installers of aftermarket vehicle lighting, maintenance teams setting up temporary safety beacons, and makers building DIY signage or visual indicators. If you need programmable microcontroller-style custom logic, a more advanced controller would be better; but for reliable, hardware-timed ON/OFF flashing without coding, this module offers a compact, cost-effective solution.