SparkFun

PicoBuck LED Driver

Name: PicoBuck LED Driver
Brand: SparkFun
SKU: SF-COM-13705
Price: 35.4 AUD
Availability: InStock

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The PicoBuck is a three-channel constant-current LED driver based on the AL8805. Each channel drives LEDs at 330 mA by default, with a solderable jumper to i...

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The PicoBuck is a three-channel constant-current LED driver based on the AL8805. Each channel drives LEDs at 330 mA by default, with a solderable jumper to increase the maximum to 660 mA per channel. Dimming is controlled via PWM or analogue voltage signals from a microcontroller.

The board supports input voltages up to 36 V (the full rating of the AL8805) and provides three independent signal inputs for individual or simultaneous channel dimming. Two snap-off mounting holes for 4-40 or M3 screws allow flexible installation.

Key Features

3-Channel Constant Current – Independent control of three LED channels
330 mA Default – Jumper-selectable increase to 660 mA per channel
PWM Dimming – 0–100% range (min <0.4 V, max >2.4 V)
Analogue Dimming – 20–100% range (0.5–2.5 V)
Wide Input Voltage – Up to 36 V DC
Snap-Off Mounting Tabs – 4-40 or M3 screw holes, removable for compact installation

Specifications

Driver IC – AL8805W5
Default Current – 330 mA per channel
Max Current – 660 mA per channel (with jumper)
Input Voltage – Up to 36 V DC
Channels – 3

Note: If using screw terminals, this board requires two different sizes — check related products for compatible terminals.

Resources

Jargon buster

Plain-language definitions for the technical terms used above.

DC: DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
LED: A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
LED driver: An LED driver is a control chip or circuit that supplies and switches power to LEDs. For a display board, it reduces the number of microcontroller pins needed and handles tasks like lighting the right segments and adjusting brightness.
microcontroller: A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
PWM: Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.

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