需求
“A 12 V motion-controlled lamp circuit with a switch input, 10 kΩ and 100 kΩ base resistors, an NPN transistor and a 220 Ω lamp load.”
接著試試Add a manual override switch.Change the lamp resistor to 470 Ω.
這張圖裡有什麼
看懂背後的決策。
01
Using a switch to model PIR output
02
NPN transistor as lamp driver
When designing motion-activated lighting for home automation or security.