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Search: Posts Made By: propellanttech
Forum: 'Bird Projects & Modifications 02-21-2018
Replies: 934
Views: 73,127
Posted By propellanttech
I like the way the oil (in the sight glass) is...

I like the way the oil (in the sight glass) is violating the laws of gravity.....much more interesting.:D
Forum: 'Bird Projects & Modifications 09-28-2017
Replies: 934
Views: 73,127
Posted By propellanttech
Love the locomotive style resistor......don't see...

Love the locomotive style resistor......don't see those everyday. Also love the setup, just don't know if I have it in me to do that modification. Would be nice though when done.
Forum: 'Bird Projects & Modifications 08-16-2017
Replies: 934
Views: 73,127
Posted By propellanttech
Check out Polulu.com. They cut stencils (or did)...

Check out Polulu.com. They cut stencils (or did) for hobbyists. You must send them the solder stencil layer though. It makes things real easy. Does increase the board build cost by $25. I don't know...
Forum: 'Bird Projects & Modifications 08-16-2017
Replies: 934
Views: 73,127
Posted By propellanttech
The reason I started building boards, was due to...

The reason I started building boards, was due to very special chips I was dealing with. It was cost prohibitive to send the chips over seas. They could not source the parts as cheap as I could.

If...
Forum: 'Bird Projects & Modifications 08-16-2017
Replies: 934
Views: 73,127
Posted By propellanttech
The paste is solder and flux combined. The solder...

The paste is solder and flux combined. The solder is in powder form in the flux.

Typically the solder stencil is .004 inch ( 4 thousands).

Believe it or not the solder paste is VERY sticky....
Forum: 'Bird Projects & Modifications 08-16-2017
Replies: 934
Views: 73,127
Posted By propellanttech
Wow, that looks great!!! A little skew on...

Wow, that looks great!!!

A little skew on the 28 pin chip, but it's hard to keep them straight when using hot air.

Very nice work.
Forum: 'Bird Projects & Modifications 08-16-2017
Replies: 934
Views: 73,127
Posted By propellanttech
There are both kind. Some stencils do the whole...

There are both kind. Some stencils do the whole board, but there are also stencils just to do an area.
Forum: 'Bird Projects & Modifications 08-16-2017
Replies: 934
Views: 73,127
Posted By propellanttech
Also solder stencils (stainless) come in...

Also solder stencils (stainless) come in different thicknesses depending on the design of the board. There is an art to designing and building PCB's. I first thought it was a strict science, and was...
Forum: 'Bird Projects & Modifications 08-14-2017
Replies: 934
Views: 73,127
Posted By propellanttech
Man a toaster is so easy. Don't even need a...

Man a toaster is so easy. Don't even need a control (this depends on solder chosen of course). I did a lot (read hundreds) of boards in a GE toaster oven, that wasn't modified. I think if you ever do...
Forum: 'Bird Projects & Modifications 08-14-2017
Replies: 934
Views: 73,127
Posted By propellanttech
I at first called it a QFN, but for the life of...

I at first called it a QFN, but for the life of me couldn't remember the exact package, so I modified my post.:confused:

The others with legs are pretty easy if you have low VOC flux. You gonna...
Forum: 'Bird Projects & Modifications 08-14-2017
Replies: 934
Views: 73,127
Posted By propellanttech
The one with pads underneath is gonna be the hard...

The one with pads underneath is gonna be the hard one . I have a pick and place, but I don't do PCB's any more. Leftover from the 2008 housing bubble that cause that business to go belly up. :(

I...
Forum: 'Bird Projects & Modifications 08-14-2017
Replies: 934
Views: 73,127
Posted By propellanttech
That is a lot of surface mount stuff to do by...

That is a lot of surface mount stuff to do by hand, especially if using lead free. Blah, not me.

Will be interested to see how it all comes out.
Forum: 'Bird Projects & Modifications 08-11-2017
Replies: 934
Views: 73,127
Posted By propellanttech
Digging the thread.....glad to see what you are...

Digging the thread.....glad to see what you are doing .......
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