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

Resources

• Hookup Guide
• Schematic (PDF)
• AL8805 Datasheet (PDF)
• GitHub