Onoff
In the land of the unfinished project I am King!
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You draw it I'll make it!
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You draw it I'll make it!
ajlelectronics
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Low-complexity generation of single pulse using RC circuit from a fixed DC supply without the use of a controller
I was looking for a similar solution to this question: I want to generate a pulse (high) of 2 seconds when that DC supply is turned ON. Is there a solution where we can implement this without usin...
electronics.stackexchange.com
ajlelectronics
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In my day, we called it "safety nose edging", but wireless wasn't even a twinkle in daddy's eye.
Onoff
In the land of the unfinished project I am King!
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I use Alexa to deal with all that. I have a simple Alexa relay which pulses the trigger on request. Then Alexa has a routine to do whatever is required according to the instruction... "Alexa, close bomb bay doors", Alexa open gates" etc.
The kids and wife use it. My dealings are limited to "Alexa, shut the **** up!"
Onoff
In the land of the unfinished project I am King!
- Messages
- 12,662
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- Sevenoaks, UK
Low-complexity generation of single pulse using RC circuit from a fixed DC supply without the use of a controller
I was looking for a similar solution to this question: I want to generate a pulse (high) of 2 seconds when that DC supply is turned ON. Is there a solution where we can implement this without usin...
Far too complicated!
ajlelectronics
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Onoff
In the land of the unfinished project I am King!
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What, two components?
5V etc ??? Thought it would just be one cap.
sparkysy
If it pays happy days!!
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What sort are you looking for?
I have found these guys very useful in the past!
I tend to use wired safety edges, retro reflective. The CAME ones are excellent, receiver is battery powered so only need to feed one side. Battery is supposed to last 3-5 years.
ajlelectronics
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That works for any realistic low voltage. Don't get hung up on values. If it wasn't so late, I would knock it up to show you. It works because a capacitor blocks DC but not AC. The startup of a DC line looks like half a wave of AC, so gets through.
Onoff
In the land of the unfinished project I am King!
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Sorted!
Timer set for nom 2 minutes.
Lights come on whilst the gate opens (20 secs). Gate stops and lights stay on (for another 20 secs). Gate closes, lights stay on. Gate shuts (takes 20 seconds) and lights stay on for a bit.
From opening to going off after shutting is nom 3 minutes.
Need to tidy the wiring but it's basically there.
Timer set for nom 2 minutes.
Lights come on whilst the gate opens (20 secs). Gate stops and lights stay on (for another 20 secs). Gate closes, lights stay on. Gate shuts (takes 20 seconds) and lights stay on for a bit.
From opening to going off after shutting is nom 3 minutes.
Need to tidy the wiring but it's basically there.
