Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered 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
DIY & Tutorials
DIY For Audio
DIY amplifier making popping sound on speakers when switching OFF
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 AVForums:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="Steerpike" data-source="post: 877356" data-attributes="member: 807"><p>The relay board must not be powered from the main DC supply, these do not drop fast enough. It must have it's own supply with minimal capacitance, or a dedicated sense line to the AC on the transformer. </p><p></p><p>Back-emf suppressor diodes on relays actually slow down the relay opening time (Lenz' law - the diode provides a current path for some time after the transistor has switched off) . Their function is to save the transistor from high voltage, not for performance.</p></blockquote><p></p>
[QUOTE="Steerpike, post: 877356, member: 807"] The relay board must not be powered from the main DC supply, these do not drop fast enough. It must have it's own supply with minimal capacitance, or a dedicated sense line to the AC on the transformer. Back-emf suppressor diodes on relays actually slow down the relay opening time (Lenz' law - the diode provides a current path for some time after the transistor has switched off) . Their function is to save the transistor from high voltage, not for performance. [/QUOTE]
Insert quotes…
Verification
Post reply
DIY & Tutorials
DIY For Audio
DIY amplifier making popping sound on speakers when switching OFF
Top