![How to Make Dual Transistor Made Amplifier Circuit (Tip3055+Tip147) DC 12v - JLCPCB : 5 Steps - Instructables How to Make Dual Transistor Made Amplifier Circuit (Tip3055+Tip147) DC 12v - JLCPCB : 5 Steps - Instructables](https://content.instructables.com/FMJ/J953/KKJQ626A/FMJJ953KKJQ626A.jpg?auto=webp&fit=bounds&frame=1&height=1024&width=1024auto=webp&frame=1&height=150)
How to Make Dual Transistor Made Amplifier Circuit (Tip3055+Tip147) DC 12v - JLCPCB : 5 Steps - Instructables
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![I need some help with my transistor as a switch circuit please. 2N4401 transistor connected to multi pattern LED circuit with 3 wires. Doesn't work when arduino powered from same 12v as I need some help with my transistor as a switch circuit please. 2N4401 transistor connected to multi pattern LED circuit with 3 wires. Doesn't work when arduino powered from same 12v as](https://preview.redd.it/2r2tujz5bqw71.jpg?width=640&crop=smart&auto=webp&s=8a457259a5329cc0ac4a903d6a6bf5d1dd948c97)
I need some help with my transistor as a switch circuit please. 2N4401 transistor connected to multi pattern LED circuit with 3 wires. Doesn't work when arduino powered from same 12v as
![Switching 12V with an NPN transistor only outputs 5V on the emitter when the base is at 5V - Electrical Engineering Stack Exchange Switching 12V with an NPN transistor only outputs 5V on the emitter when the base is at 5V - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/luKEM.png)
Switching 12V with an NPN transistor only outputs 5V on the emitter when the base is at 5V - Electrical Engineering Stack Exchange
What NPN transistor should I use if I'm planning to use a 4V current to switch on a 12V solenoid lock? - Quora
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pi 2 - How to control 12V DC motor with a NPN transistor, a GPIO pin and a 12 V DC power supply - Raspberry Pi Stack Exchange
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