Voltage regulator with alternate voltage source...

[John Robertson]

On 04/07/2016 2:25 PM, geneb wrote:
> On Thu, 7 Apr 2016, Bill Sudbrink wrote:
>
>> Maybe I'm overthinking this.  If I just put
>> regulated +5 on the 7805 VIN will it work?
>>
> Isn't the minimum input voltage for a 7805, 6vdc?
>
> g.
>
More like 7VDC input minimum (dropout voltage) for 7805 - there are data 
sheets you know (comment directed at Original Poster).

If the OP wants to put 5VDC in, why not cut out the 7805?

John :-#)#

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