"Bench" tested. The 560Ω and 6.8KΩ resisters in series produce a dim glow from the LED. The transistor appears as an open switch when it's input is low. This indicates that the power supply is hooked up and the "Status" LED is functioning. When the transistors input is high, it shorts out the 6.8K resistor. That leaves only the 560Ω resistor to limit LED current, so the LED shines brightly. ![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Ken
I think that's what can happen in "simulated" circuits. Like computer programs: "They do what you tell them to do!...exactly what you tell them to do!...and with a vengeful!"I left the switch in the circuit and current draw is almost identical.
Ken