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This is the FemtoBuck, a small-size single-output constant current LED

Each FemtoBuck has the capability to dim a single high-power channel
of LEDs from 0-350mA at up to 36V while the dimming control can be
either accessed via PWM or analog signal from 0-2.5V.

For the FemtoBuck, we've increased the voltage ratings on the parts to
allow the input voltage to cover the full 36V range of the AL8805
driver. Since the FemtoBuck is a constant current driver, the current
drawn from the supply will drop as supply voltage rises. In general,
efficiency of the FemtoBuck is around 95%, depending on the input
voltage. On board each FemtoBuck you will find two inputs for both
power input and dimming control pins and an area to install a 3.5mm
screw terminal. Finally at either side of the board you will find
small indents or "ears" which will allow you to use a zip tie to
secure the wires to the board after soldering them down.


Click 'show more' to display specifications.

General information

Manufacturer SparkFun
Product type Electronics modules
Item number5998517
Manufacturer no.COM-13716

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Returns and warranty

Warranty 24 month Bring-in
30-day right of return

30-day right of return

This product may be returned within 30 days after shipment or collection. A minimum of 10% will be deducted from opened products. Unfortunately, we cannot accept a product if it is damaged, incomplete or missing its original packaging.

Returns and warranty

Please use our simplified returns and warranty process to return a product or register a warranty case. Returns and warranty

Please use our simplified warranty process to view the warranty period as well as any warranty extensions you may have purchased. This will ensure that your return or warranty case is processed quickly and effectively.


Mail delivery

 Expected delivery time: approx. 10–12 days
Currently > 5 piece(s) in stock at the supplier


All locations

 Expected delivery time: approx. 10–12 days
Currently > 5 piece(s) in stock at the supplier

If ordered immediately.
Information subject to change.

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SparkFun FemtoBuck LED Driver SparkFun FemtoBuck LED Driver