Onboard supply voltage - a bit of a conundrum
Posted: 08 Jul 2019, 10:37
I am looking for advice here. When I am using arduino boards to drive servo's in a model, I tap the supply from the BEC in the ESC, which normally delivers around 5V. Should I hook this up directly to the 5V connection on the board, or would it be safer to hook it up to the V-in of the regulator?
The minimum supply voltage of the ATtiny85 chip for instance is specified as 2.7V, so the voltage drop over the regulator should not be a problem. However, the PWM signal to the servos will probably drop by the same amount, and this could be a problem. I will supply power to the servos directly from the bec, no question there.
Any thoughts?
Cheers,
Max.
The minimum supply voltage of the ATtiny85 chip for instance is specified as 2.7V, so the voltage drop over the regulator should not be a problem. However, the PWM signal to the servos will probably drop by the same amount, and this could be a problem. I will supply power to the servos directly from the bec, no question there.
Any thoughts?
Cheers,
Max.