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The Electronics Inside
Documents Netgear JGS516PE and PoE Kit Teardown -- The Electronics Inside 83
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  • Author Author: pchan
  • Date Created: 19 Mar 2024 3:16 PM Date Created
  • Last Updated Last Updated: 20 Mar 2024 1:51 PM
  • Views 1213 views
  • Likes 6 likes
  • Comments 4 comments
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Netgear JGS516PE and PoE Kit Teardown -- The Electronics Inside 83

In this episode, David explores the technology of Power over Ethernet (PoE), dissecting three devices powered by a single lead and a network switch. 

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David begins by providing a comprehensive understanding of Ethernet, delving into the intricacies of twisted pair cables such as Cat 5e and Cat 6a. He emphasizes the importance of twist rates, conductor size, and copper purity when it comes to data speeds, which range from 10 to 10,000 megabits per second. 

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David then jumps into Power over Ethernet, or PoE, elucidating the concept of Power Sourcing Equipment (PSE) and Powered Devices (PDs), and highlighting the advantages of centralized power distribution. Cameras, wireless access points, and even the Raspberry Pi 3 and 4 are discussed as examples benefiting from PoE, eliminating the need for separate power sources. 

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The discussion extends to PoE injectors, devices that add power to an Ethernet signal, and PoE switches, which are pivotal in providing power to multiple devices. David meticulously dissects a 16-port PoE switch, while discussing the complexities of managing power distribution and data traffic. Larger switches used in data centers are briefly touched upon, emphasizing their massive power requirements and advanced capabilities. 

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The teardown doesn't conclude with only switches; David extends the exploration to PoE-enabled devices like a security camera and a wireless access point. Through these teardowns, he exposes the unique challenges and design considerations associated with integrating PoE functionality into these devices. 

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  • RPI POE Hat
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  • beacon_dave
    beacon_dave over 1 year ago in reply to a531016

    What sort of control would you be using over the Ethernet ?

    Art-Net / sACN or more roll your own using a microcontroller with wired Ethernet support ?

    What would you be controlling ? Moving head with pan and tilt, dimming, colour, etc ?

    The ETC Source Four Mini LED is around 12W

    https://www.etcconnect.com/Products/Architectural-Fixtures/Source-Four-Mini/Features.aspx

    and would be pretty cool to convert to PoE with dimming.

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  • beacon_dave
    beacon_dave over 1 year ago

    Nice episode.

    I've been running mini studio cameras over PoE for a couple of years now. They connect to a 10Gbps 90W PoE converter device that sends bidirectional video, audio, talkback, sync, timecode, tally lights, control and camera power over a single Cat6A cable.

    https://www.blackmagicdesign.com/uk/products/blackmagicstudiocamera/techspecs/W-CST-09

    I've also been using HDBaseT devices which can deliver up to 100W over Cat5e/6A wiring.

    https://hdbaset.org/hdbaset-technology 

    Have just been refurbing an AV installation recently and ceiling mics, touch panels, Bluetooth audio input plates, USB bridging interfaces, PTZ cameras, networked relays, audio IO expanders, etc. are all powered using PoE.

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  • a531016
    a531016 over 1 year ago in reply to DAB

    I'm genuinely considering trying some LED spotlights I have some nice ones that are 10W each, so well within the power spec!  It'd be cool to drive power and control over a single wire!

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  • DAB
    DAB over 1 year ago

    Very interesting tear down.

    I have been considering purchasing a camera that runs POE.

    They are specifying it as good for 100 m, so I was very curious about what was inside the POE driving circuit to make that happen.

    The same outfit is using RPI 3b with the sensors hat with POE.

    I may have to look more into using this approach.

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