# DIY PoE module for Ethernet FeatherWing **URL:** \ **Category:** Hardware\ **Created:** [February 28, 2025, 11:47am UTC](https://community.particle.io/t/diy-poe-module-for-ethernet-featherwing/69214 "2025-02-28T11:47:51Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![EMKAH](https://avatars.discourse-cdn.com/v4/letter/e/35a633/32.png) [@EMKAH](https://community.particle.io/u/EMKAH)\ **Post date:** [February 28, 2025, 11:47am UTC](https://community.particle.io/t/diy-poe-module-for-ethernet-featherwing/69214/1 "2025-02-28T11:47:51Z")
Hi there, Sadly, the PoE module for the Ethernet FeatherWing is no longer available. I happen to have a Silvertel Ag9905LP module lying around, so I thought, I'd give it a DIY shot. I have found the respective schematics in the documentation, which raises a few questions: ![poe-schematic](https://us1.discourse-cdn.com/flex026/uploads/particle/original/3X/3/0/3034555806136c122d048311661acc204ef4c5d2.png) 1. concerning R1 and R2: which value is needed? And which one would I populate? Can somebody who owns that module pls check? Looks like a standard voltage divider to me, but the text suggests it isn't. 2. concerning R3: was this populated on the original module? And agian, which value? 3. Concerning the polarized capacitor without a designation: which value (again)? Best regards, Markus ---
**Author:** ![rickkas7](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/rickkas7/32/8681_2.png) [@rickkas7](https://community.particle.io/u/rickkas7)\ **Post date:** [February 28, 2025, 12:04pm UTC](https://community.particle.io/t/diy-poe-module-for-ethernet-featherwing/69214/2 "2025-02-28T12:04:38Z")
Neither R1 nor R2 are populated, leave both unpopulated so ADJ floats, which does not adjust the voltage output. R3 is populated and is 270Ω. The large capacitor appears to be 100µF 10V. ---
**Author:** ![EMKAH](https://avatars.discourse-cdn.com/v4/letter/e/35a633/32.png) [@EMKAH](https://community.particle.io/u/EMKAH)\ **Post date:** [February 28, 2025, 12:09pm UTC](https://community.particle.io/t/diy-poe-module-for-ethernet-featherwing/69214/4 "2025-02-28T12:09:16Z")
Thank you! That was fast! I have found the official datasheet of the Silvertel module itself as well, which was very helpful with most of the questions. ---
**Author:** ![EMKAH](https://avatars.discourse-cdn.com/v4/letter/e/35a633/32.png) [@EMKAH](https://community.particle.io/u/EMKAH)\ **Post date:** [February 28, 2025, 1:04pm UTC](https://community.particle.io/t/diy-poe-module-for-ethernet-featherwing/69214/5 "2025-02-28T13:04:46Z")
@rickkas7 can I also assume that the headers J1, J2 and J3 are aligned in the schematic in the same the way they are arranged physically on the 'wing (ethernet connector on the left)? Unfortunately I don't have Eagle to view the original design files. ---
**Author:** ![rickkas7](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/rickkas7/32/8681_2.png) [@rickkas7](https://community.particle.io/u/rickkas7)\ **Post date:** [February 28, 2025, 1:24pm UTC](https://community.particle.io/t/diy-poe-module-for-ethernet-featherwing/69214/6 "2025-02-28T13:24:15Z")
Correct. ![Screenshot 2025-02-28 at 8.22.45 AM](https://us1.discourse-cdn.com/flex026/uploads/particle/original/3X/7/2/72a6dab2047746b8b0b4dba76035eed8d94ed5f3.png) One thing to keep in mind is that the headers and discrete components are on the bottom of the circuit board, because the Silvertel module is sitting on top. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/particle/original/3X/6/4/64635adccc35238caa19e9b553ec3e98b163d026.png) [@system](https://community.particle.io/u/system)\ **Post date:** [March 30, 2025, 11:24pm UTC](https://community.particle.io/t/diy-poe-module-for-ethernet-featherwing/69214/7 "2025-03-30T23:24:46Z")
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