Fig. 1 displays the author's fully assembled prototype of the emergency light cum advertising display board featuring the alphabets 'V' and 'J'
Circuit and its working
The circuit diagram of the emergency light cum advertising display board is shown in Fig. 2. It comprises transformer X1, 12V voltage regulator LM7812 (IC1), timer NE555 (IC2), NPN transistor SL100 (T1), a 12V SPDT relay, and some other components. The transformer and bridge rectifier recharge the battery directly when mains 230V AC is connected across CON1.
Diese Geschichte stammt aus der December 2023-Ausgabe von Electronics For You.
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Diese Geschichte stammt aus der December 2023-Ausgabe von Electronics For You.
Starten Sie Ihre 7-tägige kostenlose Testversion von Magzter GOLD, um auf Tausende kuratierte Premium-Storys sowie über 8.000 Zeitschriften und Zeitungen zuzugreifen.
Bereits Abonnent? Anmelden
STK435 IC-Based STEREO AMPLIFIER
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A SEWER DRAIN SHIELD For Smart Cities
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ESP32 SPEECH FUNCTION: Text To Speech
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World's Smallest Programable INDUSPHONE DESIGN
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FLAME-SENSING FIRE ALARM Using An Arduino Nano
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loT-Based Distribution Transformer CONDITION MONITORING SYSTEM
The proposed IoT-based distribution transformer condition monitoring system enables real-time monitoring of distribution transformers, identifying such deviations as overload conditions and overheating.
Wi-Fi 6 AND Wi-Fi 7 Powering The Next Wave of Smart Connectivity
Wi-Fi 6 leads with faster data rates and reduced latency while upcoming Wi-Fi 7's backward compatibility will facilitate gradual upgrades from Wi-Fi 6, easing transitions. However, advanced features like multi-link operation (MLO) and ultra-low latency may command a premium, making Wi-Fi 7 suited for high-end applications.
CHARGE FORWARD: High-Voltage Batteries And MSMEs Can Fuel INDIA'S EV REVOLUTION
A nuanced explanation of low- and high-voltage EV batteries by Dr Gokhale, Vice President for Battery Technology at JSW Energy, illuminates their advancements and influence. The essential role of MSMEs and academia in developing a strong EV ecosystem emerges, marking their significance for India's push towards self-reliance in this innovative field.
"MILES TO GO Before I Sleep"
A teacher illuminates the path to success through the light of knowledge, yet some teachers extend that light to society through their contributions and research. Known as the architect of the modern M3 electronic voting machine (EVM) and the voter verifiable paper audit trail (VVPAT) that transformed India's democratic process, Prof. (Dr) Rajat Moona's journey began in the modest town of Bareilly. Here is his story, as recounted to and written by EFY's Yashasvini Razdan.
STARTUPS & INNOVATORS
1 One Charger To Charge All Your Devices | 2 Harnessing AI Technology For Efficient Pest Management | 3 Wireless Light-Based Communication With Velmenni's Technology
