![Step by step build photoresistor LDR NPN BJT 2N3904 light controlled switch circuit by electronzap - YouTube Step by step build photoresistor LDR NPN BJT 2N3904 light controlled switch circuit by electronzap - YouTube](https://i.ytimg.com/vi/HECPgXDnhTg/maxresdefault.jpg)
Step by step build photoresistor LDR NPN BJT 2N3904 light controlled switch circuit by electronzap - YouTube
![microcontroller - What are the fundamentals behind this p-channel MOSFET / driver circuit? - Electrical Engineering Stack Exchange microcontroller - What are the fundamentals behind this p-channel MOSFET / driver circuit? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/wyIwf.png)
microcontroller - What are the fundamentals behind this p-channel MOSFET / driver circuit? - Electrical Engineering Stack Exchange
![Single 2N3904 NPN bipolar junction transistor BJT LED flasher electronics circuit how to DIY - YouTube Single 2N3904 NPN bipolar junction transistor BJT LED flasher electronics circuit how to DIY - YouTube](https://i.ytimg.com/vi/NNVJT1JP0JY/hq720.jpg?sqp=-oaymwEhCK4FEIIDSFryq4qpAxMIARUAAAAAGAElAADIQj0AgKJD&rs=AOn4CLAIwgphOvm1zR2rFO50naiGCe3b1A)
Single 2N3904 NPN bipolar junction transistor BJT LED flasher electronics circuit how to DIY - YouTube
![20PCS MMBT3904 2N3904 3904 Marking 1AM NPN SOT-23 Patch transistor SMD Triode transistor - AliExpress 20PCS MMBT3904 2N3904 3904 Marking 1AM NPN SOT-23 Patch transistor SMD Triode transistor - AliExpress](https://ae01.alicdn.com/kf/S8dd2738804204ae7b6aea0f1923da352a/20PCS-MMBT3904-2N3904-3904-Marking-1AM-NPN-SOT-23-Patch-transistor-SMD-Triode-transistor.jpg)