latching ckt design.

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Dan Asbjornsen

Joined May 3, 2015
1
Hello from Dan KB7UXE..
I have a control ckt that works well using two relays.
I would like to eliminate the relays and change over to transistors.
I have a 12 V source , < 1amp , I need to sink to ground.
I would like to latch it to ground with a momentary ground.
Then release it with a momentary 12V signal .
Due to the sources, the control parameters are set.
ckt needs to be connect with gnd,, and open with 12V.
any help is really appreciated.
Thank you.
Dan. kb7uxe. . .

here is a drawing. any suggestions on what to use or better way to do it ? ???




switch ckt.jpg







CKT12786321.jpg
 

MrChips

Joined Oct 2, 2009
30,712
The owners of All About Circuits have elected not to allow discussions of automotive electrical system modifications/enhancements due to safety concerns, the potential of legal ramifications and the possible circumvention of vehicle regulations at the state and federal level.

This thread is against the AAC forum rules, Chapter 6, as seen here:
6. Restricted topics. The following topics are regularly raised however are considered “off-topic” at all times and will result in Your thread being closed without question:

• Any kind of over-unity devices and systems
Automotive modifications
• Devices designed to electrocute or shock another person
• LEDs to mains
• Phone jammers
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This can be found in our Terms of Service (ToS)

Here is a site that may provide you with some assistance: Electro Tech Online

Good luck.
 
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