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Need a device to send 12volts when all 3 green lights are

 
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nuckolls.bob(at)aeroelect
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PostPosted: Thu Jan 11, 2018 1:04 pm    Post subject: Need a device to send 12volts when all 3 green lights are Reply with quote

At 02:01 PM 1/11/2018, you wrote:
Quote:
On 1/11/2018 1:37 PM, Jeffrey W. Skiba wrote:
Quote:
Below is the landing gear circuit, I need a device or build one that can use the 12volts coming from the gear down and locked switches and only send 12 volts to another device[for testing a led] IF ALL 3 lights (gear down and locked)

Can you just hook all the down-lock switches in series?



Bob . . .


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nuckolls.bob(at)aeroelect
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PostPosted: Fri Jan 12, 2018 1:33 pm    Post subject: Need a device to send 12volts when all 3 green lights are Reply with quote

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Quote:
Bob . . .
What's wrong with using a CMOS 3 input AND gate (linked in an earlier email)?

Here's one that works on 12V, & you get 2 spare devices in the package:
http://www.ti.com/lit/ds/symlink/cd4082b.pdf

Not a thing . . . just one of several alternatives.


Bob . . .


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