Conv TTL Blocking issueshttps://ohwr.org/project/conv-ttl-blo/issues2019-02-12T09:59:32Zhttps://ohwr.org/project/conv-ttl-blo/issues/15V2-1: suggestion to make output level switchable2019-02-12T09:59:32ZErik van der BijV2-1: suggestion to make output level switchableThe blocking level output is fixed at 24V \[2, table 4\].
Roger Barlow (CERN TE-ABT) suggested to build in a future version the
option to make the blocking output level switchable as they use a 15V
level. Likely settable via the dip switches.
- 5V
- 15V
- 24V (currently implemented)
Actually it may need to be other levels as 11, 18, 23, 24, 30 and 35V
have been used in boards at CERN \[1\].
The blocking level is set by a DC-DC converter that may use different
voltages (check if may be lower than the 12V input used).
Reference:
\[1\] [Standard Blocking Output Signal Definition for CTDAH
board](https://www.ohwr.org/project/conv-ttl-blo/uploads/8ba57dff4f18540c947830f70e8c8ead/BlockingSpecification.pdf)
\[2\] [User guide](https://www.ohwr.org/project/conv-ttl-blo/wikis/Documents/CONV-TTL-BLO-User-Guide) (table 4 shows
signal levels)https://ohwr.org/project/conv-ttl-blo/issues/12Obsolete MOSFET in 24V blocking supply circuit2019-02-12T09:59:30ZDenia Bouhired-FerragObsolete MOSFET in 24V blocking supply circuitThe Vishay SI4110DY n-channel TrenchFET power MOSFET is now obsolete.
It must be replaced with an equivalent MOSFET for version 3.0.Denia Bouhired-FerragDenia Bouhired-Ferraghttps://ohwr.org/project/conv-ttl-blo/issues/5EOL of Flash memory2019-02-12T09:59:23ZDenia Bouhired-FerragEOL of Flash memoryThe M25P32-VMF6P flash memory on the conv-ttl-blo appears to be EOL. A
few stocks might still be available for urgent production, but ideally
it should be replaced.
If a similar footprint flash can be found it would be ideal, with a new
version of the board to be released (v5) for the new component.
Better still, a design that can take multiple flash chip footprints
might be required, and could be the most future-proof solution.