Reply to thread

Message

<blockquote data-quote="ShawnH" data-source="post: 739952">I am working on a circuit where a relay controls the output of a mono jack. Recently, I was informed that it might be necessary to incorporate ESD or other transient voltage protection into connectors that may come into human contact. However, I have found limited resources on implementing ESD protection specifically for mono/stereo jacks in this type of configuration.Below are images of the circuit for reference:<a href="https://i.sstatic.net/LRzRMXvd.png"><img src="https://i.sstatic.net/LRzRMXvd.png" alt="enter image description here" class="fr-fic fr-dii fr-draggable " style="" /></a><a href="https://i.sstatic.net/iIDLeTj8.png"><img src="https://i.sstatic.net/iIDLeTj8.png" alt="enter image description here" class="fr-fic fr-dii fr-draggable " style="" /></a>In this setup, the transistor receives a signal from the MCU, which activates the relay, thereby closing the switch for the mono output (U8). I have placed a TVS diode to ground on the mono jack, but I am unsure if this is the correct method for protecting the mono jack against ESD.Could anyone provide insights or recommendations on the appropriate way to implement ESD protection for this circuit?Also, is there a way to implement ESD without connecting to GND, to keep the relay&#039;s switch closure isolated?Thank you for any assistance.Here is an updated simplified image of the schematic, with the TVS diode in another possible location:<a href="https://i.sstatic.net/zOtfVbX5.png"><img src="https://i.sstatic.net/zOtfVbX5.png" alt="enter image description here" class="fr-fic fr-dii fr-draggable " style="" /></a></blockquote>

[QUOTE="ShawnH, post: 739952"] I am working on a circuit where a relay controls the output of a mono jack. Recently, I was informed that it might be necessary to incorporate ESD or other transient voltage protection into connectors that may come into human contact. However, I have found limited resources on implementing ESD protection specifically for mono/stereo jacks in this type of configuration. Below are images of the circuit for reference: [URL='https://i.sstatic.net/LRzRMXvd.png'][IMG alt="enter image description here"]https://i.sstatic.net/LRzRMXvd.png[/IMG][/URL] [URL='https://i.sstatic.net/iIDLeTj8.png'][IMG alt="enter image description here"]https://i.sstatic.net/iIDLeTj8.png[/IMG][/URL] In this setup, the transistor receives a signal from the MCU, which activates the relay, thereby closing the switch for the mono output (U8). I have placed a TVS diode to ground on the mono jack, but I am unsure if this is the correct method for protecting the mono jack against ESD. Could anyone provide insights or recommendations on the appropriate way to implement ESD protection for this circuit? Also, is there a way to implement ESD without connecting to GND, to keep the relay's switch closure isolated? Thank you for any assistance. Here is an updated simplified image of the schematic, with the TVS diode in another possible location: [URL='https://i.sstatic.net/zOtfVbX5.png'][IMG alt="enter image description here"]https://i.sstatic.net/zOtfVbX5.png[/IMG][/URL] [/QUOTE]

Name

Verification