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LU9DCE > ALL 09.03.90 17:04l 22 Lines 1198 Bytes #999 (0) @ WW
BID : 8832_LU9DCE
Subj: ELECTRONICS FACTS 09-MAR
Path: IZ3LSV<IK6IHL<IK7NXU<HB9ON<DK0WUE<PD0LPM<VE3CGR<VE3TOK<LU9DCE
Sent: 260309/1601Z 8832@LU9DCE.TOR.BA.ARG.SOAM LinBPQ6.0.25
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PACKET RADIO STATION - BUENOS AIRES (GF05OM)
PYTHON SCHEDULED NEWSLETTERS (PSN)
COPYRIGHT 2026 - EDUARDO A. CASTILLO
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CERAMIC CAPACITORS CAN PRODUCE AUDIBLE SOUND. DUE TO THE PIEZOELECTRIC
PROPERTIES OF THE CERAMIC DIELECTRIC MATERIAL, THESE COMPONENTS
PHYSICALLY VIBRATE WHEN SUBJECTED TO RAPIDLY CHANGING VOLTAGES, SUCH
AS THOSE FOUND IN SWITCHING POWER SUPPLIES. THIS VIBRATION GENERATES
ACOUSTIC NOISE IN THE HUMAN HEARING RANGE, TYPICALLY BETWEEN 20 HZ AND
20 KHZ, WHICH IS WHY YOU SOMETIMES HEAR A HIGH-PITCHED WHINE OR
SINGING SOUND COMING FROM ELECTRONIC DEVICES LIKE PHONE CHARGERS OR
COMPUTER POWER SUPPLIES WHEN THEY ARE UNDER LOAD.
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PYTHON PREPROCESSOR - DEVELOPED BY LU9DCE - VERSION 1.1
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