Femtobuck 1A

Components & Accessories LEDs
1

I need two femtobucks converted to 1A, any images/examples of what a proper modification looks like?

This thread says to add a third resistor but the hookup guide says to replace the resistors.

2

The default is replacement; you’d replace the 0.3 Ohm ones with 0.1 Ohm and be good to go…the linked thread is in the uncommon case that you do not plan to replace the resistors and instead add a third in parallel. Either should yield the desired result

You can solder the 3rd 0.3 resistor in parallel https://cdn.sparkfun.com/assets/4/a/3/d/0/femtobuckv13.pdf

https://cdn.sparkfun.com/assets/learn_tutorials/4/3/0/13716-02.png or replace the ‘current sense resistors’ pictured with 0.1 :slight_smile:

FWIW I think replacement is simpler

3

Thanks Russell. So just remove both resistors and put one 0.1 on one of the pads?

4

Yep - The left one is R1, the one you’re after…in theory you could just swap it only but I imagine that could be tricky with the other one in the way

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