Have a look at
There are many sites with similar/identical circuits for reverse voltage
protection.
Donald.
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On 2020-11-15 10:57 a.m., Dave wrote:
That sounds like it needs me to go do some research on that one. :) I
use a PTC fues for protection on the USB powered version but my other
boards use battery power from 2.4 to whatever voltage but usually 3v
max. And like I asked Bertho, does a diode bridge even work with DC?
Thanks,
Dave
On 11/14/2020 7:36 PM, Harvey White wrote:
That takes care of the power supply polarity to the board (you might
want to investigate a P Channel FET for a power protection device, it
works for reverse polarity as long as you don't exceed a negative
input greater than the gate/source rating).
It doesn't help the LED on the board at all.? I'm assuming more on the
board than just a resistor and LED, though.
Harvey
On 11/14/2020 7:08 PM, Bertho wrote:
Dave,
The easy, foolproof way is to add a diode bridge and it does not
matter how
it is plugged in.
The drawback is that you have two extra diode voltage drops.
Bertho
