Design a small 7-port USB hub PCB
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£15/hr(approx. $19/hr)
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Description
Experience Level: Intermediate
This should be quite a straightforward project, although it will need someone familiar with PCB layout requirements of USB hardware.
I am designing a circuit board using the popular package Fritzing; part of this circuit should include a USB hub. However, developing the main hub functionality in Fritzing is proving challenging: what I would like is a daughterboard that I can plug into the main board to provide the majority of the USB logic. The project is to design this daughterboard.
I envisage that the main board would contain the USB ports, upstream included, and any other parts that need to be associated with the ports. The daughterboard would contain a single ASIC (there are some 7-port designs around), capable of operating to USB 2.0 standard, and other attendant bits - I imagine this could simply be an interpretation of the reference design of the chosen ASIC.
I imagine the daughterboard could connect via a standard simple terminal block. It would be nice to put port power management off the daughterboard to reduce the number of connection pins required (e.g. (7 + 1) x 2 data = 14, plus two for power - I imagine a 16-pin connector minimum).
Constraints:
* I'd like the daughterboard to be both as small and as cheap to manufacture as possible. Cheap is better than small, and consideration to this would be good.
* Some guidance in terms of designing the main board circuit would be needed: I imagine a bit of guidance about ground plane, track width and length, etc.
* Each port should be capable of powering basic usb devices.
* The power supply would be a PC-style ATX PSU, so the board should be powered from +5V and GND, and a relatively noisy supply. Grounding issues should be identifiable.
I imagine the first deliverables being:
1. identification of appropriate hardware
2. initial daughterboard design
3. review of mainboard design to sanity check pin-outs etc. for USB boards
Possible further bits:
4. investigation of the additional costs incurred by extending the project to include LED port lighting
5. post-fabrication help shaking out potential bugs
6. enclosure advice - I intend the case to be metal, and understanding how this circuitry should be grounded is important.
I am designing a circuit board using the popular package Fritzing; part of this circuit should include a USB hub. However, developing the main hub functionality in Fritzing is proving challenging: what I would like is a daughterboard that I can plug into the main board to provide the majority of the USB logic. The project is to design this daughterboard.
I envisage that the main board would contain the USB ports, upstream included, and any other parts that need to be associated with the ports. The daughterboard would contain a single ASIC (there are some 7-port designs around), capable of operating to USB 2.0 standard, and other attendant bits - I imagine this could simply be an interpretation of the reference design of the chosen ASIC.
I imagine the daughterboard could connect via a standard simple terminal block. It would be nice to put port power management off the daughterboard to reduce the number of connection pins required (e.g. (7 + 1) x 2 data = 14, plus two for power - I imagine a 16-pin connector minimum).
Constraints:
* I'd like the daughterboard to be both as small and as cheap to manufacture as possible. Cheap is better than small, and consideration to this would be good.
* Some guidance in terms of designing the main board circuit would be needed: I imagine a bit of guidance about ground plane, track width and length, etc.
* Each port should be capable of powering basic usb devices.
* The power supply would be a PC-style ATX PSU, so the board should be powered from +5V and GND, and a relatively noisy supply. Grounding issues should be identifiable.
I imagine the first deliverables being:
1. identification of appropriate hardware
2. initial daughterboard design
3. review of mainboard design to sanity check pin-outs etc. for USB boards
Possible further bits:
4. investigation of the additional costs incurred by extending the project to include LED port lighting
5. post-fabrication help shaking out potential bugs
6. enclosure advice - I intend the case to be metal, and understanding how this circuitry should be grounded is important.
Alex H.
0% (0)Projects Completed
1
Freelancers worked with
1
Projects awarded
50%
Last project
26 Jul 2013
United Kingdom
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