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| Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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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. |
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#2
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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. |
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#3
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"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. |
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