Cobalt poe trigger
About the Cobalt poe trigger PCB
Cobalt poe trigger is an open source PCB design by msaribekyan, published on GitHub. It is a 4-layer board measuring 60 × 40 mm, with 20 components from 15 distinct parts.
Other key parts include the TPS2378DDA. By type, the board carries 7 resistors, 4 connectors, 4 diodes, 3 capacitors and 1 IC.
From the project
802.3af / 802.3at PoE trigger board
The board is designed to negotiate with 802.3af and 802.3at PoE injectors and output stable 48V DC power.
The board uses the TPS2378 IC from Texas Instruments. The ethernet transformer is placed between the input and output ethernet jacks. Center taps from the PoE side are used for PoE classification and power transfer, while the other side uses the Bob Smith termination. An indicator LED shows when the negotiations are successful.
Main components on the Cobalt poe trigger
Cobalt poe trigger bill of materials (BOM)
20 components, 15 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TPS2378DDA | SOIC127P600X170-9N | IC1 |
| 1 | PoE + Data | RJ-055-1 | J1 |
| 1 | Data | RJ-055-1 | J2 |
| 2 | Conn_01x02 | JST_VH_B2P-VH-FB-B_1x02_P3.96mm_Vertical | J3, J4 |
| 1 | 30F-51NL | Transformer_Ethernet_YDS_30F-51NL_SO-24_7.1x15.1mm | TR1 |
| 2 | ABS10 | Diode_Bridge_Diotec_ABS | D1, D2 |
| 1 | SMAJ58A | D_SMA | D3 |
| 1 | Orange | LED_0603_1608Metric | D4 |
| 1 | 100nF | C_1206_3216Metric | C1 |
| 1 | 1nF | C_1206_3216Metric | C2 |
| 1 | 22uF | C_Elec_6.3x7.7 | C3 |
| 1 | 24.9k | R_0402_1005Metric | R1 |
| 1 | 63.4R | R_0402_1005Metric | R2 |
| 4 | 75R | R_0603_1608Metric | R3, R4, R5, R6 |
| 1 | 22k | R_0603_1608Metric | R7 |
Cobalt poe trigger design files
The KiCad project lives in the msaribekyan/cobalt-poe-trigger repository on GitHub; these links point at the commit this page was built from.
- Layoutsrc/poe_trigger.kicad_pcb
- Schematicsrc/poe_trigger.kicad_sch
Cobalt poe trigger: common questions
How big is the Cobalt poe trigger PCB?
The Cobalt poe trigger measures 60 × 40 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Cobalt poe trigger?
20 components, from 15 distinct parts. The full bill of materials is listed on this page.
Where can I download the Cobalt poe trigger design files?
From the msaribekyan/cobalt-poe-trigger repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Cobalt poe trigger design in my own project?
The repository has no license, so all rights stay with msaribekyan. Use it as a reference, and ask the author before reusing the design.