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Dave Boland
- Jan 1, 1970
- 0
Can anyone point me to a good document(s) on wire wrap? I'm looking for
a discussion on equipment, technique, performance, and reliability. The
reason for this is that pre-prototype printed cards seem to be a waist
of money because of all of the changes to the cards as soon as they
arrive (most due to the "hey, while your at it" syndrome).
The only downside is the use of surface mount devices, but we can likely
use adapters at that development stage.
Failing any documentation that would impress management, can anyone
answer these questions?
1. If a card is going to be WW, are pads and PTH's really needed? The
reason for the question is that there is no ground plane anyway, and
soldering to the socket lead seems like it is as good as soldering to a
pad. Components soldered are bypass capacitors as close to the device
as possible.
2. What is the number of connections that make power WW equipment
justifiable? I like to see development done (early stages) modularly,
so each card may have between 125 to 250 connections. A typical project
is only a few cards (modules). Once the design is stable we go for PC
cards anyway.
Any useful help would be appreciated.
Thanks,
Dave
a discussion on equipment, technique, performance, and reliability. The
reason for this is that pre-prototype printed cards seem to be a waist
of money because of all of the changes to the cards as soon as they
arrive (most due to the "hey, while your at it" syndrome).
The only downside is the use of surface mount devices, but we can likely
use adapters at that development stage.
Failing any documentation that would impress management, can anyone
answer these questions?
1. If a card is going to be WW, are pads and PTH's really needed? The
reason for the question is that there is no ground plane anyway, and
soldering to the socket lead seems like it is as good as soldering to a
pad. Components soldered are bypass capacitors as close to the device
as possible.
2. What is the number of connections that make power WW equipment
justifiable? I like to see development done (early stages) modularly,
so each card may have between 125 to 250 connections. A typical project
is only a few cards (modules). Once the design is stable we go for PC
cards anyway.
Any useful help would be appreciated.
Thanks,
Dave