Electronics > Beginners
Hookup wire
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MarkF:
Are we really talking about how to make a protoboard a permanent fixture?

The key word here:  "prototype"

Is this thing going into space?  Get a PCB made and put it into an enclosure!
Or just put some feet on the board.

Unless you are a bull in a china store, a little attention in handling the board should last some time.

   
fixit7:
Curious as to why there are 2 resistors on this side?

Is there a pic of the other side?

Does this show wire wrapping?

MarkF:

--- Quote from: fixit7 on June 11, 2019, 03:08:33 am ---Curious as to why there are 2 resistors on this side?

Is there a pic of the other side?

Does this show wire wrapping?

--- End quote ---

The resistors are a modification to the filters for the encoder pins.  To reduce noise and contact bounce.

Yes.  This is a very small example of wire-wrapping.  Except for the discrete components.
Notice for stain relief, I ran the wire down from the top in the same hole as the component pin, soldered and then ran the wire to the bottom side through the hole next to it.  Essentially, creating a "J" hook.

This is a 1Hz to 10MHz function generator based on an AD9834 DDS and a PIC18F2550 MCU.

   

Edit- 
   More detail here:  https://www.eevblog.com/forum/beginners/diy-function-generator/msg1115550/#msg1115550
MarkF:
Here is a restoration of a DEC PDP-8 computer.
All the backplanes are wire wrapped.  It can be a real rat's nest.
   https://homepage.cs.uiowa.edu/~jones/pdp8/UI-8/log2013.shtml


And here is a closeup example I found online.  Modified wrap.

   

F.Y.I. 
  There are two different wire wrap tools. 
  The "Standard" wrap just wraps the bare wire around the post. 
  The "Modified" wrap wraps one loop of the insulation around the post. 
  Wrapping the insulation around the post helps prevent shorts to an adjacent post or wire. 

  There are also different length posts.  Typically, 2 and 3 layer posts.
  The number of layers being the number of wires you can put on one post.
David Hess:

--- Quote from: MarkF on June 12, 2019, 10:07:47 am ---And here is a closeup example I found online.  Modified wrap.

...

There are also different length posts.  Typically, 2 and 3 layer posts.
The number of layers being the number of wires you can put on one post.
--- End quote ---

Also note that wire wrap posts are square and not round.  The corners of the square posts bite into the wire and form a gas tight seal.  When you unwrap a wire, you can feel where the metal post and wire melded together at the sharp corners.

If a round post was used, tarnish between the wire and post can eventually make for an unreliable connections.  If you must wirewrap a round post like a component lead, it should be lightly soldered as well.
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