Tuesday, 13 January 2015

Using low-voltage halogen transformer for LED?


During a recent kitchen renovation, the electrician installed LED under-counter "pucks" and drove them with a 120VAC-to 12V, 40 kHz transformer labelled "low voltage halogen supply." I'm fully aware that LEDs are happy operating at 40 kHz (one transformer blew & I have to replace it), but is there any reason to change the driving frequency? Obviously, if I were to change, I'd stay above 100Hz or so to avoid any visual flicker, and there may be a complete death of commercial devices at other output frequencies.


FWIW, the 40kHz drivers cause two minor problems: AM radios nearby are not happy, and the fancy circuitry in my exhaust hood's lighting system tends to flicker (even though normally turned off) when the LEDs are on. I'm guessing a low-frequency LED driver might mitigate these side effects.




No comments:

Post a Comment

arduino - Can I use TI's cc2541 BLE as micro controller to perform operations/ processing instead of ATmega328P AU to save cost?

I am using arduino pro mini (which contains Atmega328p AU ) along with cc2541(HM-10) to process and transfer data over BLE to smartphone. I...