[hpsdr] Introducing the Hermes-Lite

[John Marvin]

Steve,

Sorry, I missed the additional pictures in the pcb directory. Obviously 
there are more jumpers there that can hopefully be eliminated in a V2 board.

Thanks,

John

On 4/13/2014 5:01 PM, John Marvin wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> Steve,
>
> This is really cool! I suspect this is going to take off, especially 
> if TAPR is willing to produce finished boards (after a little more 
> shakedown and polishing by early adopters). Even if not, I've been 
> wanting to take my surface mount skills to the next level, but wasn't 
> willing to try something as expensive and as complicated as a Hermes 
> board from scratch.
>
> So, who wants to be in the first wave of early adopters? Can we get 
> together a group purchase of PCB's and components? Perhaps there 
> should only be a small number of people in the first wave, who are 
> willing to build immediately and help refine things for the next 
> group. I'm willing to help or coordinate things, but I would need help 
> with understanding and completing the process of preparing the gerber 
> files for submitting to a PCB vendor. I would also need someone else 
> to do any modifications that might be required (since I am not 
> familiar with the tools involved), based on Steve's replies to the 
> questions below?
>
> Some quick questions and a request:
>
> 1) The picture you provided showed some small jumper wires, one on the 
> FPGA board and one on the Hermes Lite board.  What were these required 
> for? If required, I'm assuming the Hermes Lite board can be modified 
> to remove the need for the jumper wire, correct? Are there any more 
> jumpers that are not visible?
> Any other changes you would suggest for a version 2 board?
>
> 2) Any chance you could provide higher resolution photos of both the 
> front and back of the Hermes Lite board without the FPGA board attached?
>
> Thanks!
>
> John
> AC0ZG
>
> On 4/13/2014 4:05 PM, Steve Haynal wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>>
>>
>> Hello List,
>>
>> I have been working on a lower cost variant of the Hermes which I am 
>> calling Hermes-Lite. All the details are at
>>
>> https://github.com/softerhardware/Hermes-Lite
>>
>> The design is entirely open source and open hardware. The cost of all 
>> materials (including the BeMicro SDK board) is around $150. The FPGA 
>> firmware is a port of the Hermes RTL and is compatible enough to work 
>> with existing Hermes software. The ADC/DAC is the AD9866 12-bit 
>> integrated device intended for cable modems which I have repurposed 
>> as a 0-36 MHz transceiver. RX/TX tests of my prototype show good 
>> performance. The github site has instructions for listening to the 
>> receiver online.
>>
>> I had hoped to have a more polished project before releasing, but I 
>> am starting a new job tomorrow and will have limited time for this 
>> project. Any help on this project or derivatives is welcome.
>>
>> Thank you to all the people at openhpsdr who developed the Hermes and 
>> provided valuable IP to reuse in this project.
>>
>> 73,
>>
>> Steve
>> KF7O
>>
>>
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