Circuit Collection of Design Ideas from Electronics and EDN

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mediatechnology
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Relay-Based ON/OFF Flip-Flop Remembers State During Power Failure

Post by mediatechnology » Tue Apr 17, 2018 3:01 pm

Relay-Based ON/OFF Flip-Flop Remembers State During Power Failure

http://www.electronicdesign.com/analog/ ... er-failure

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JR.
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Re: Circuit Collection of Design Ideas from Electronics and EDN

Post by JR. » Tue Apr 17, 2018 5:02 pm

or there's flash memory... :lol:

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Re: Circuit Collection of Design Ideas from Electronics and EDN

Post by mediatechnology » Tue Apr 17, 2018 8:41 pm

Don't know of any flash memory that can maintain a galvanic connection in the absence of power.
Or for that matter directly switch a high-current load.
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Re: Circuit Collection of Design Ideas from Electronics and EDN

Post by JR. » Tue Apr 17, 2018 9:05 pm

If that's a criteria maybe consider using a mechanical switch?

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Re: Circuit Collection of Design Ideas from Electronics and EDN

Post by mediatechnology » Tue Apr 17, 2018 9:19 pm

I think the requirement also included actuation via a pushbutton switch or momentary pulse.
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Transistor Array Squares Control Current

Post by mediatechnology » Mon Jan 14, 2019 4:15 pm

"Transistor Array Squares Control Current," Burkhard Braach, EDN, January 22 1987.

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"Transistor Array Squares Control Current," Burkhard Braach, EDN, January 22 1987.

https://proaudiodesignforum.com/images/ ... 2_1987.pdf
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"Enhanced Op Amp Delivers 100V P-P" Barry Kline, EDN, September 5, 1985.

Post by mediatechnology » Mon Jan 14, 2019 5:09 pm

"Enhanced Op Amp Delivers 100V P-P," Barry Kline, EDN, September 5, 1985.

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"Enhanced Op Amp Delivers 100V P-P," Barry Kline, EDN, September 5, 1985.

https://proaudiodesignforum.com/images/ ... 5_1985.pdf
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CDC: "For 6% of the deaths, COVID-19 was the only cause mentioned. For deaths with conditions or causes in addition to COVID-19, on average, there were 2.6 additional conditions or causes per death." https://www.cdc.gov/nchs/nvss/vsrr/covi ... /index.htm
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Re: Circuit Collection of Design Ideas from Electronics and EDN

Post by Jacko » Fri Mar 29, 2019 3:45 am

LM317 smooths but doesn't regulate:

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LM317 Capacitance Multiplier
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LM317-smooths-but-doesn-t-regulate.pdf
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Re: Circuit Collection of Design Ideas from Electronics and EDN

Post by mediatechnology » Fri Mar 29, 2019 4:17 am

Thanks Jacko for posting.
I added a thumbnail for you.
I had never thought about using an LM317 this way.
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Re: Relay-Based ON/OFF Flip-Flop Remembers State During Power Failure

Post by terkio » Fri Mar 29, 2019 7:37 pm

mediatechnology wrote: ↑
Tue Apr 17, 2018 3:01 pm
 Relay-Based ON/OFF Flip-Flop Remembers State During Power Failure

http://www.electronicdesign.com/analog/ ... er-failure

Image

Image
Isn't it easier to remember state during power failure with one of those ?
Latching relay
Toggle switch
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