STEM 125-14

Placement, modules, components and accessories; the ones that exist and the the nice-to-be's
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Joined: Fri Jun 03, 2016 8:40 pm

STEM 125-14

Post by recently » Sun Mar 12, 2017 8:41 am

Hello,
several month ago I buyed a Redpitaya where I can see V1.1 printed on the board. It`s a great hardware and so I tried to buy a second one but made the fault that I did not care for the version, I just ordered a cheap one and got a 10Bit Version. I recognized the missing SATA-ports and started to understand the differences and returned the RP to the dealer. Now I got my second RP, I ordered a STEM 125-14, but I got one with V1.0 printed on the board. I payed 275 € and expected the latest available technique. What are the differences between V1.0 and v1.1 regarding STEM 125-14 ?. I`m frustrated and thinking about returning this device again.
Henning

Support
Posts: 5
Joined: Mon Oct 05, 2015 9:44 pm

Re: STEM 125-14

Post by Support » Mon Mar 13, 2017 11:56 am

Dear Henning,
in V1.1 we did some minor improvements that doesn't affect performances.
We have also added linear power supplies for analog part, but they are not populated anyway.
There were no changes in voltage on pin 2 - there is a mistake in the schematics - this voltage is still -3.3V not -4V.
Best regards,
Red Pitaya Team

mjdbishop
Posts: 7
Joined: Wed Feb 01, 2017 1:51 pm

Re: STEM 125-14

Post by mjdbishop » Tue Mar 14, 2017 10:36 am

Hello Red Pit
Pin 2 on which connector(s) ?
Also, could you confirm where the schematics for each of the variants can be downloaded and the table of variants + commentaries.
I recon there are at least:
- Original (aka 125-14) V1.0.1 : available at https://dl.dropboxusercontent.com/s/jkd ... v1.0.1.pdf
- V1.1 : with 4V vice 3V3 on pin 2, schematics ?
- 125-10 V1.0 : available at http://downloads.redpitaya.com/doc/Red_ ... 0_V1.0.pdf
Changing the voltage on pin(s) is a BIG issue - it makes things die, I and the community need to know more
Martin

redpitaya
Site Admin
Posts: 215
Joined: Wed Mar 26, 2014 7:04 pm

Re: STEM 125-14

Post by redpitaya » Thu Mar 16, 2017 8:40 pm

Hi Martin, we have fixed our reply since it was misleading.
kind regards, Red Pitaya team

mjdbishop
Posts: 7
Joined: Wed Feb 01, 2017 1:51 pm

Re: STEM 125-14

Post by mjdbishop » Sat Mar 18, 2017 1:00 pm

Hi Red Pit
Thank you for the errata : E2 p2 is -3V3 on all variants.
The obvious measurement agrees on a (125-14) v1.1 and a 125-10 v1.0.
Best Regards
Martin

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