VR = VESP - VBE = 3.3V - 0.7V = 2.6V
I = VR / R = 2.6V / 150Ω = 17.3 mA
That's too much current for the ESP to source. You could probably just add another 150Ω resistor in series.
Pieter
VR = VESP - VBE = 3.3V - 0.7V = 2.6V
I = VR / R = 2.6V / 150Ω = 17.3 mA
That's too much current for the ESP to source. You could probably just add another 150Ω resistor in series.
Pieter