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Switching 12V with an NPN transistor only outputs 5V on the emitter when the base is at 5V - Electrical Engineering Stack Exchange
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Wooge Power Transistor & Voltage Regulator, Mosfet, Thyristor Assortment Kit, 82 pcs, 24 Types, 78L05 L7805 L7905 LM317 TL431 MAC97A6 BTA06 TIP3c TIP41c TIP42c D882 BC140 IRF540 IRFZ44 TIP122 Others : Amazon.it:
![Scheda amplificatore di potenza per segnale PLC NPN/PNP per guidare l'elettrovalvola Transistor di isolamento fotoelettrico 5A, 3.3V 5V 12V 24V Scheda amplificatore di potenza per segnale PLC NPN/PNP per guidare l'elettrovalvola Transistor di isolamento fotoelettrico 5A, 3.3V 5V 12V 24V](https://ae01.alicdn.com/kf/H11fbd97f5b9441449ce288aa8e2f6c16a/Scheda-amplificatore-di-potenza-per-segnale-PLC-NPN-PNP-per-guidare-l-elettrovalvola-Transistor-di-isolamento.jpg)
Scheda amplificatore di potenza per segnale PLC NPN/PNP per guidare l'elettrovalvola Transistor di isolamento fotoelettrico 5A, 3.3V 5V 12V 24V
![4-32 canali scheda IO scheda amplificatore di segnale PLC PNP NPN ingresso di conversione fotoaccoppiatore isolamento Transistor trigger tensione 5V _ - AliExpress Mobile 4-32 canali scheda IO scheda amplificatore di segnale PLC PNP NPN ingresso di conversione fotoaccoppiatore isolamento Transistor trigger tensione 5V _ - AliExpress Mobile](https://ae01.alicdn.com/kf/Hc4e85de8c0654fe7aaad089c4d659618H.jpg_640x640Q90.jpg_.webp)
4-32 canali scheda IO scheda amplificatore di segnale PLC PNP NPN ingresso di conversione fotoaccoppiatore isolamento Transistor trigger tensione 5V _ - AliExpress Mobile
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uxcell 100pcs S9013 Transistor J3 NPN 5V 500mA 300mW Surface Mount SOT-23: Amazon.com: Industrial & Scientific
![switches - Control 5 V load with transistor 3.3 V - Raspberry Pi - Electrical Engineering Stack Exchange switches - Control 5 V load with transistor 3.3 V - Raspberry Pi - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/S1NUbm.png)
switches - Control 5 V load with transistor 3.3 V - Raspberry Pi - Electrical Engineering Stack Exchange
![Scheda IO PLC modulo relè interfaccia 4-32 canali PNP NPN ingresso optoaccoppiatore isolamento Transistor trigger tensione 3.3v - AliExpress Scheda IO PLC modulo relè interfaccia 4-32 canali PNP NPN ingresso optoaccoppiatore isolamento Transistor trigger tensione 3.3v - AliExpress](https://ae01.alicdn.com/kf/S97dd982faa364bd2855241a056103c221/Scheda-IO-PLC-modulo-rel-interfaccia-4-32-canali-PNP-NPN-ingresso-optoaccoppiatore-isolamento-Transistor-trigger.jpg)
Scheda IO PLC modulo relè interfaccia 4-32 canali PNP NPN ingresso optoaccoppiatore isolamento Transistor trigger tensione 3.3v - AliExpress
![Is it possible to use an NPN transistor to control a 5V power supply from Arduino? - Electrical Engineering Stack Exchange Is it possible to use an NPN transistor to control a 5V power supply from Arduino? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/u1iQ9.png)