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From: "Edward Rawde" <invalid@invalid.invalid>
Newsgroups: sci.electronics.design
Subject: Re: Another design
Date: Sat, 11 May 2024 18:37:21 -0400
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"John Larkin" <jjSNIPlarkin@highNONOlandtechnology.com> wrote in message 
news:frvu3jh6lj91hpd0u5ifsl57aifkeshi7k@4ax.com...
> On Fri, 10 May 2024 18:17:47 -0400, "Edward Rawde"
> <invalid@invalid.invalid> wrote:
>
>>"piglet" <erichpwagner@hotmail.com> wrote in message
>>news:v1m48d$1j1bc$1@dont-email.me...
>>> Edward Rawde <invalid@invalid.invalid> wrote:
>>>> "John Larkin" <jjSNIPlarkin@highNONOlandtechnology.com> wrote in 
>>>> message
>>>> news:gnps3j99nl7t4dkdt22k7oe5tr0e6dh60i@4ax.com...
>>>>> On Thu, 9 May 2024 23:11:03 -0400, "Edward Rawde"
>>>>> <invalid@invalid.invalid> wrote:
>>>>>
>>>>>> "Edward Rawde" <invalid@invalid.invalid> wrote in message
>>>>>> news:v1ho21$4ps$1@nnrp.usenet.blueworldhosting.com...
>>>>>>> Now with 9V to 15V input range, direct gate drive and 500mA LED
>>>>>>> current.
>>>>>>>
....
>
> Something like this should work.
>
> https://www.dropbox.com/scl/fi/su03d8gaxbi67zhufz3th/LED_CC_Reg_1.jpg?rlkey=oh4ib9011ee1c74ih7hk7dzcb&raw=1
>
> But I'd rather use a TPS562208, which would be cheaper and simpler and
> has spread-spectrum to help the EMC thing by about 20 dB.

Thanks for circuit and the chip reference John. That meets my cost 
requirement.
I always felt that spread spectrum for EMC was cheating but I'm aware that 
there are good arguments why it is not.

Also many thanks to piglet for taking time to post circuits.

>
>