Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Main Forums
Automation, Cinema, Computers, Television Forum
Help with killing power from 12v trigger
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Talk Electrician Forum:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="Arthurdent" data-source="post: 521249" data-attributes="member: 28781"><p>If you pull the 12v adapter out of the 5v usb but leave it connected to the screen lift does it close immediately or exhibit the same problem.</p><p></p><p>I would expect a step-up buck converter to have a reasonably chunky capacitor on its output, but then I would also expect a simple screen trigger to draw at least a few mA either directly driving a relay or through and optocoupler or something. So if it runs that long then I would think the TV is not just delivering residual from a capacitor its intentionally driving the output; perhaps to give an external HDD time to flush cache and spin down for example after sending it a power off. </p><p></p><p>I recently just swapped a 12v relay for a 5v relay in a 240v screen trigger, the rest of the components were fine as is. But my usb port shuts down sharpish.</p></blockquote><p></p>
[QUOTE="Arthurdent, post: 521249, member: 28781"] If you pull the 12v adapter out of the 5v usb but leave it connected to the screen lift does it close immediately or exhibit the same problem. I would expect a step-up buck converter to have a reasonably chunky capacitor on its output, but then I would also expect a simple screen trigger to draw at least a few mA either directly driving a relay or through and optocoupler or something. So if it runs that long then I would think the TV is not just delivering residual from a capacitor its intentionally driving the output; perhaps to give an external HDD time to flush cache and spin down for example after sending it a power off. I recently just swapped a 12v relay for a 5v relay in a 240v screen trigger, the rest of the components were fine as is. But my usb port shuts down sharpish. [/QUOTE]
Insert quotes…
Verification
Post reply
Main Forums
Automation, Cinema, Computers, Television Forum
Help with killing power from 12v trigger
Top