Go Down

Topic: Arduino, 16 LEDs, and a battery pack. In a helmet. (Read 3797 times) previous topic - next topic


What voltage are you seeing into the board (Vin) and out of the regulator (Vcc)?

I would run the 6V thru a single diode to drop some voltage and connect to the Vcc pin.  You don't need a lot of regulation, just a little voltage drop to get away from the Absolute Max voltage rating of 6V.

A standard diode, like a 1N4001, would work but it will have a constant voltage drop regardless of battery voltage.  A 5.1 V zener diode will give a stable "ceiling" value of approximately 5.1 VDC.  However, the cheapest and most readily available, like the 1N4733A, won't be rated to the likely continous current draw.  Therefore you'd either have to find one with a higher continous current rating, or put a few 1N4733As in parallel.  If I were you I'd choose the former rather than the latter, because the electronics will be in close proximity to your head (these low voltages won't do much harm, but in some circumstances can still cause unpleasant shocks).


What voltage are you seeing into the board (Vin) and out of the regulator (Vcc)?

With ~6 hours of use so far, I'm seeing:

All LEDs off:
5.46v Vin
4.56v Vcc

All LEDs on:
5.34v Vin
4.34v Vcc
Electrical Engineering Student

Go Up

Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

via Egeo 16
Torino, 10131