Hey guys,
I have the attached circuit for an LED to turn on when a voltage reaches a certain limit. I want it to turn on at 5.6V (keeping in mind the 0.6V for the transistor).. so would I use a 5V Zener diode and a 150 Ohm resistor for the LED (5V/150Ω = 33mA; LED needs 30mA) ? Don't understand why he uses a 2K-2.7KΩ for his LED
Thanks in advance
Max
I have the attached circuit for an LED to turn on when a voltage reaches a certain limit. I want it to turn on at 5.6V (keeping in mind the 0.6V for the transistor).. so would I use a 5V Zener diode and a 150 Ohm resistor for the LED (5V/150Ω = 33mA; LED needs 30mA) ? Don't understand why he uses a 2K-2.7KΩ for his LED
Thanks in advance
Max
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