Hello, friends!
I want to share with you my ideas and developments, to get feedback or even help!
The essence of the project is to create a universal platform for PCI-E riser, which allows to use it with various devices - from nettops, laptops to stationary PCs.
Local page devoted to development: https://vk.com/x4p_riser
Proceeding from this, the following requirements were formulated:
- Compactness
- External power 12v (with dc-dc 3.3v)
• Ability to use both ATX power supplies with autostart when you turn on the main device (PC), and 12v AC-DC
- Detachable connectors for connection to PCI-E x1, x4, x8, x16, miniPCI-E, M2 ...
More about the implementation approach
-Using in the riser only data lines, clock signals, PERST, WAKE and + 3.3v as external power management. The remaining lines are not critical.
-Interface cable - micro coaxial or twin-axial cable assembly with connectors I-PEX Cabline VS 30pin 0.5mm pitch
-Multifunctionality of ATX power connector (8pin pci-e)
1. Input connection using pci-e 6pin connector (autostart not supported)
2. Input connection using the 8pin pci-e adapter on the 4pin + ATX 20pin CPU (the touch-sensitive 4th pin through the transistor is closed in. The transistor control will allow to realize autostart on a separate PSU)
3. Output (up to 75W) 6pin pcie connection when using 12v AC-DC via 5.5 * 2.5 connector - will allow you to connect video cards with external power supply with a total power consumption up to 150w (maximum power limit due to the connector and mosfet as a key)
At the moment, the components for the main module are selected and placed, and the complement is acquired:
[SPOILER="Old scheme"]
[/SPOILER]
[SPOILER="Other preview 3d image Composition field"]
[/SPOILER]
It is necessary:
- Make the final layout of the main module and the separable connectors for different interfaces
- To choose a manufacturer for making cables according to my schemes (negotiations are already under way, I hope for a positive result and a reasonable price)
- Collect money to buy missing components, order cables, order printed boards)))
- Build and test!
I await your comments!
And sorry for my English)
