4 layers140 × 104 mm
Remram
hasenbanck/remram
32bit STM32F7 based 3D printing controller using TMC2130 stepper driver
264 parts40
2 layers49.5 × 45.7 mm
486VRM
matt1187/486VRM5486 3.3V interposer adapter
- Size
- 49.5 × 45.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 129
- Pads
- 390
- Tracks, vias
- 2,058, 504
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 31 Dec 2023
- Updated
- 4 Dec 2025
Overview
486VRM is an open-source printed circuit board by matt1187, from the matt1187/486VRM repository on GitHub. It is a 2-layer board of 49.5 × 45.7 mm with 25 parts on 129 nets, routed with 2,058 tracks and 504 vias.
It is built around the TPS54308DDC. Its parts include 11 capacitors, 6 resistors, 1 IC and 1 inductor.
Main components
1README
README.mdProject 486VRM.
A interposer for 3.3V 486 for using on motherboard without 3.3V regulator. A advantage of this 486VRM interposer: switching regulator instead linear regulator. -> less heating.
PCB Revision History
- 000 initial draft
- 001 smaller pcb size, current limit resistor added for Intel DX4 I/O buffer (pin J1), added solder help
Feartures
- Vcore can be adjusting with jumper: 3.3V, 3.45 and 4V
- Clock-Multi jumper (for some DX4 and AMD/Cyrix 5x86)
- Writeback L1 jumper
- connector for fan, 5V
Pictures & how to soldering of pin
- I use "BGA"-technologie on this interposer.
- using of solder paste is very recommend.
- you need solder iron with long and small chisel for extra adding of tin to socket.
- "solder helper hold pin (bottom) on their place.
- very recommend: solder only one row with pin to pcb, then second row, then third row.
Bill of material
[
| Footprint | Count | Value | Supplier | Order-number |
|---|---|---|---|---|
| Top1 | 1 | 486 | various | PGA-168 486 168pin socket |
| Bot1 | 1 | 486 | various | turned pin header, dia =0.5mm |
| JP1 | 1 | WB/WT | Digikey | 609-78511-203HLF-ND |
| JP2 | 1 | voltage | Digikey | 609-78511-203HLF-ND |
| JP3 | 1 | CLKMUL | Digikey | 609-78511-203HLF-ND |
| JP4 | 1 | FAN | Digikey | 609-78511-203HLF-ND |
| U1 | 1 | TPS54308DDCR | Digikey | 296-47880-1-ND |
| R1 | 1 | 50Ω | Digikey | 541-CRCW080550R0FKTACT-ND |
| R2 | 1 | 100kΩ | Digikey | 311-100KARCT-ND |
| R3 | 1 | 22kΩ | Digikey | 311-22KARCT-ND |
| R4 | 1 | 430kΩ | Digikey | 311-430KARCT-ND |
| R5 | 1 | 91kΩ | Digikey | 311-91KARCT-ND |
| R6 | 1 | 100Ω | Digikey | 603-RC0805JR-07100RL |
| C4,C3,C2,C1 | 4 | 10µF | Digikey | 399-C1206C106M3PAC7210CT-ND |
| C6 | 1 | 75pf | Digikey | 478-3743-1-ND |
| C10,C9,C8,C7,C5 | 5 | 0.1µF | Digikey | KGM21NR71H104KT |
| C11 | 1 | 47µF | Digikey | T491C476M010AT |
| L1 | 1 | 10µh | Digikey | LMLP07A7M100DTAS |
License
The project is free for non-commercial reproduction. Do not sell it on Ebay or other platforms for profit. Do not make a closed source derivative. Share your experiences and ideas with the community.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 0.1µF | Capacitor_SMD:C_0805_2012Metric | C5, C7, C8, C9, C10 |
| 4 | 10µF | Capacitor_SMD:C_1206_3216Metric | C1, C2, C3, C4 |
| 1 | 100 | Resistor_SMD:R_0805_2012Metric | R6 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric | R2 |
| 1 | 10µh | Inductor_SMD:L_Taiyo-Yuden_NR-80xx | L1 |
| 1 | 22k | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | 33µ | Capacitor_Tantalum_SMD:CP_EIA-6032-15_Kemet-U | C11 |
| 1 | 430k | Resistor_SMD:R_0805_2012Metric | R4 |
| 1 | 486 | Package_LGA:PGA-168 | Top1 |
| 1 | 486 | Package_LGA:PGA-168_Socket | Bot1 |
| 1 | 50 | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 75pf | Capacitor_SMD:C_0805_2012Metric | C6 |
| 1 | 91k | Resistor_SMD:R_0805_2012Metric | R5 |
| 1 | CLKMUL | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP3 |
| 1 | FAN | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP4 |
| 1 | TPS54308 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | WB/WT | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 1 | voltage | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP2 |
Questions
How big is the 486VRM PCB?
It measures 49.5 × 45.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 486VRM use?
25 parts, built around the TPS54308DDC. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the 486VRM KiCad files?
From the matt1187/486VRM repository on GitHub, at the commit this page was made from: the board is 486VRM/486VRM.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the 486VRM design in my own project?
Its repository states no licence, so its author keeps all rights: ask matt1187 before reusing the design.
Similar boards
- 2 layers36 × 30 mm
- 4 layers73 × 98 mm
ALBERT FLIGHTCOMPUTER
felixznr/ALBERT
Albert I was a rhesus macaque monkey and the first mammal launched on a rocket (V-2 Rocket "Blossom No. 3") on June 18, 1948.
161 partsMIT - 2 layers37 × 23 mm
TPS5430 Buck 5V
Kraad25/TPS5430_Buck_5V
12V-to-5V synchronous buck converter (TPS54308), designed in KiCad
20 parts - 2 layers66.1 × 70.8 mm
- 4 layers155.5 × 81.5 mm
- 4 layers82 × 82 mm
- 2 layers46.6 × 80.3 mm
EpicSEPIC
spiwocoal/547452
Convertidor DC/DC topología SEPIC para ramo Taller de sistemas electrónicos
52 parts