PWM power supplies!!
 

Has anyone built a device to "listen" to pulse
width modulated power supplies? My hearing
is getting bad, & I can't hear the "chirp" on plugin
in T.V.'s for example! Rono.

I use a scope, and DMV to troubleshoot them. With my hearing, I could never
hear one of these. I am sure that the dog or cat can!

--

Jerry G.
======


"Rono" wrote in message
...
Has anyone built a device to "listen" to pulse
width modulated power supplies? My hearing
is getting bad, & I can't hear the "chirp" on plugin
in T.V.'s for example! Rono.

"Jerry G." wrote in message
...
I use a scope, and DMV to troubleshoot them. With my hearing, I could
never
hear one of these. I am sure that the dog or cat can!



Many of them operate at 50KHz or more, even with flawless hearing you
wouldn't hear them.