0
\$\begingroup\$

A few weeks ago, I asked about controlling a DC powered LED lamp using PWM here, I was told that if I can get a LED lamp that uses an external DC adapter to power up, I can use a MOSFET and control it using PWM.

So I have found a LED lamp from Ikea, it's the HARTE LED Lamp, it is powered off a USB cable. As far as my understanding go, USB provides a DC power, so I am understanding that I should be able to control it, dim it by modifying the USB cable, attach a MOSFET to it, is that right?

\$\endgroup\$

1 Answer 1

Reset to default
0
\$\begingroup\$

If it uses a USB cable, that should be 5 VDC, so yes, but there's a caveat.

There might be some active circuitry in the lamp already, controlling the LED. If that is the case, adding PWM to the input power may or may not give you the result that you want.

\$\endgroup\$
2
  • \$\begingroup\$ If there is no active circuitry in the lamp, would I be able to control it properly then? \$\endgroup\$
    – lwschan
    Commented May 13, 2016 at 14:59
  • \$\begingroup\$ I can't see why not. \$\endgroup\$
    – Dampmaskin
    Commented May 13, 2016 at 15:02

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.