Antenna measuring tools antivirus How Service Equipment halogena Digital Inverter household Desaign

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"BELAJARELEKTRONIKA-FUN" If we pay attention! halogena highway lights will flash automatically when the circumstances surrounding halogena the dark (night). The following circuit is a series of these lights. As darkness detection we use LDR.
Q1 requires a voltage of about 0.7 to activate the base. If the base is active then the transistor will akatif and relay ON. When exposed to light the LDR its resistance decreases so that the voltage at R2 and R3 is quite large (voltage divider circuit) so that Q1 is active. If at night / dark LDR obstacles so great that the voltage on R2 and R3 are small so that Q1 OFF. 220 v lamp can we connect halogena to the relay. Relay has two pins are NC (normaly closed) and NO (normaly open). Since the relay ON during the day was in the evening the lights OFF then we connect to NC. VR is used to determine the sensitivity of the sensor LDR.
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