crowbar protection

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rigmo
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crowbar protection

Post by rigmo » Sat Apr 24, 2021 8:00 pm

prevent possible damage on your 12V circuits from your main 48v PSU ( i have bad experience with step down)
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Zozo
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Re: crowbar protection

Post by Zozo » Sat Apr 24, 2021 8:41 pm

Good work Rigmo, very useful circuit. I have experimented with a similar design with an old Watson PSU that had no over volt protection. I see you've added an extra buffer transistor from the TL431 to the Triac.
~Give me a transmitter with things that glow any day!

rigmo
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Re: crowbar protection

Post by rigmo » Sun Apr 25, 2021 10:15 am

simpler version
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Re: crowbar protection

Post by rigmo » Wed May 19, 2021 8:38 pm

final crowbar protection PCBs up to 8A and up to 25A. direct indirect pickup voltage protection. (main psu from or before after step-down) stage)
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rigmo
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Re: crowbar protection

Post by rigmo » Mon Jun 07, 2021 11:07 pm

operate fine..

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teckniqs
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Re: crowbar protection

Post by teckniqs » Tue Jun 08, 2021 7:39 am

OK, ......so who else thought this thread was about using a metal crowbar as a weapon for protection? :)

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Re: crowbar protection

Post by MiXiN » Tue Jun 08, 2021 9:37 am

teckniqs wrote:
Tue Jun 08, 2021 7:39 am
OK, ......so who else thought this thread was about using a metal crowbar as a weapon for protection? :)
:D :lol:

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Bton-FM
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Re: crowbar protection

Post by Bton-FM » Tue Jun 08, 2021 10:45 am

teckniqs wrote:
Tue Jun 08, 2021 7:39 am
OK, ......so who else thought this thread was about using a metal crowbar as a weapon for protection? :)
YES!!

I thought it was to stop people crowbaring safes...

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Re: crowbar protection

Post by rigmo » Tue Jun 08, 2021 4:55 pm

of course, one should also protect oneself from excessive stupidity. hahaha
for example you have a 48V power supply and you need to protect the fans and the exciter pll ... everything works at 12V from the breakdown of the power supply step down converter...
there is also a solution to protect the amplifier from voltage surges over 48V
overvoltage Crowbar protection version 8A, 25A and 100A

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Re: crowbar protection

Post by Bton-FM » Tue Jun 08, 2021 7:22 pm

rigmo wrote:
Tue Jun 08, 2021 4:55 pm
of course, one should also protect oneself from excessive stupidity. hahaha
Come to the UK and see how long it takes for your transmitter to be taken! Then you will not think we are stupid! :tup

rigmo
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Re: crowbar protection

Post by rigmo » Tue Jun 08, 2021 10:32 pm

bTON-uk - that is your reasoning.... not my words!
funny to you, it's not for me ... for you the first thought of crowbar protection is something completely different ... for me there is only one thing to protect the transmitter from burnout ... you resonate on other waves and I'm really sorry ...
yes, you have super abilities if you take down so fast or your just chasing your thinking? best regards..

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Bton-FM
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Re: crowbar protection

Post by Bton-FM » Tue Jun 08, 2021 11:17 pm

rigmo wrote:
Tue Jun 08, 2021 10:32 pm
bTON-uk - that is your reasoning.... not my words!
funny to you, it's not for me ... for you the first thought of crowbar protection is something completely different ... for me there is only one thing to protect the transmitter from burnout ... you resonate on other waves and I'm really sorry ...
yes, you have super abilities if you take down so fast or your just chasing your thinking? best regards..
I think you are misunderstanding me!

What I meant was, here in the UK, thieves will often take transmitters very quickly after you install them on a roof. For that reason, people sometimes put the transmitter in a safe to stop thieves taking it. They can disappear quite quickly otherwise.

I didn't mean to sound threatening like I was going to take your rig! :)

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Re: crowbar protection

Post by teckniqs » Wed Jun 09, 2021 8:08 am

Oh god now look what I've started haha....

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Bton-FM
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Re: crowbar protection

Post by Bton-FM » Wed Jun 09, 2021 3:32 pm

teckniqs wrote:
Wed Jun 09, 2021 8:08 am
Oh god now look what I've started haha....
:shock: :lol:

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Re: crowbar protection

Post by rigmo » Thu Jun 10, 2021 11:36 pm

you moved the world with a lever :D

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