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LU9DCE > ALL 18.03.26 18:44z 22 Lines 1166 Bytes #196 (0) @ WW
BID : 9535_LU9DCE
Read: GUEST
Subj: ELECTRONICS FACTS 18-MAR
Path: HB9ON<DK0WUE<PD0LPM<VE3CGR<LU9DCE
Sent: 260318/1830Z 9535@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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A LIGHT EMITTING DIODE (LED) CAN OPERATE IN REVERSE AS A LIGHT SENSOR.
WHEN YOU REVERSE-BIAS AN LED (CONNECT IT BACKWARDS), IT STOPS EMITTING
LIGHT AND INSTEAD GENERATES A SMALL ELECTRICAL CURRENT WHEN EXPOSED TO
PHOTONS. THIS PROPERTY ALLOWS A SINGLE LED TO FUNCTION AS BOTH AN
EMITTER AND DETECTOR IN BIDIRECTIONAL COMMUNICATION SYSTEMS, TOUCHLESS
SWITCHES, AND EVEN IN SOME DIY PROJECTS WHERE PEOPLE USE THE SAME LED
FOR BOTH ILLUMINATING A BUTTON AND DETECTING WHEN A FINGER APPROACHES
IT.
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PYTHON PREPROCESSOR - DEVELOPED BY LU9DCE - VERSION 1.1
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