My V.2.0 hardware wishlist

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sobomax
Posts: 10
Joined: Thu May 21, 2015 5:28 am

My V.2.0 hardware wishlist

Post by sobomax » Tue Jun 30, 2015 11:00 pm

Hey guys at redpitaya and elsewhere, I suggest we start discussing your plans for 2.0 hardware and maybe give you some ideas of what could be useful features of the next version. From my personal PoV it would be nice to have:

1. Ability to add/substract fixed DC offset into/from the output signal after DAC and/or substract/add it from the input signal before that actually goes into ADC. I think that's the feature that needs to be in hardware rather than in software, since if you offset your signal in the digital domain that effectively reduces your dynamic range. Any decent scope does it in hardware, so that you can get good resolution for small AC signals that ride on larger DC offset. That also makes calibration for the imperfections of the i/o stage easier.

2. A li-ion charging controller on board, i.e. TPS65217 or the like, so that it's easier to use RP in field by just whacking some random li-ion cell. Don't repeat the same mistake as BBB guys did, by not connecting MUX IN/MUX OUT pin to some unused ADC pins on the SOC. This greatly improves ability to do self-diagnostic and monitoring.

3. Adding some protection of the i/o stage would be good. There've been some reports of the input/outbut burnouts.

Thanks!

-Max

redpitaya
Site Admin
Posts: 218
Joined: Wed Mar 26, 2014 7:04 pm

Re: My V.2.0 hardware wishlist

Post by redpitaya » Wed Jul 01, 2015 11:57 am

Hi,
Thank you for the suggestions.
We also hope that V2.0 will be ASAP.
Regards

Arnold
Posts: 54
Joined: Wed Mar 11, 2015 3:07 pm

Re: My V.2.0 hardware wishlist

Post by Arnold » Wed Jul 01, 2015 8:44 pm

- higher input sampling rate
- as many input channels as a standard oscilloscope, so 4 or 5...
- 4-5 output channels with a higher Vpp (currently 2) for the function generators. output and input should match in the voltage range...
- SATA interface to store data on a SSD disk, useful for tasks where streaming over the network is not fast enough or the DDR memory is to small...
- more powerful ARM CPU (3 GHz), maybe 4 cores.
- more DDR memory.

and V2.0 should really be open source, HW, SW, everything. at the moment open source is a fake in my mind.
any idea when V2.0 will be started/ready to be shipped?

DF4IAH
Posts: 14
Joined: Thu Aug 20, 2015 12:19 am
Location: JN49HL / Germany nr. Heidelberg

Re: My V.2.0 hardware wishlist

Post by DF4IAH » Sat Aug 22, 2015 11:16 pm

... and here is my wish list:

- add all configuration lines from the ADC to the FPGA. That would enable the possibility to switch on data randomization and alteration to get the best out of the ADCs. Never bind such configuration lines hard to VCC or GND

- replace the DAC which is meanwhile no more available

- remove all oscillators and keep just one. Get all needed frequencies from the PLLs from the FPGA, which keeps these clocks stable in phase

- avoid moving signals and data between different clock zones without synchronization! That is VERY important, indeed!

- keep the developer community happy and let us see your hardware schematics. ;)

Thanks,
Uli, DF4IAH 8-)

augustocampos
Posts: 1
Joined: Thu May 12, 2016 7:16 pm

Re: My V.2.0 hardware wishlist

Post by augustocampos » Sat May 28, 2016 2:56 pm

Could you please provide the following for the next gen?
.- 100 MHz Bandwidth, or at least 60 MHz Bandwithd.
.- AC Multiplexer add-on so we could select to monitor different AC sources either on demand or periodically.
.- Several Channels: At least 4

Thanks.

ted051
Posts: 20
Joined: Fri May 29, 2015 11:47 am
Location: Germany, Elsterberg

Re: My V.2.0 hardware wishlist

Post by ted051 » Thu May 04, 2017 5:02 pm

My wish:
Make switchable In-/ Outputs for 50 Ohm/ High impedance, (via jumpers).
Wolfgang

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