[sdantonio]

Well, my free samples came in. Those damn things are small.

Any suggestions on how to handle the soldering of them other than (1) carefully, (2) steady hands and (3) Large magniufying glass?

Their going into the s3977 of Phils (actually it's oes modification with the 12V regulator.

Steven

[pminmo]

Flux, a holding device, fine tipped soldering iron no more than 25W. One of the challenges with a homemade pcb is the lack of solder mask. You can help by getting a pen that does solder mask repair. And practice before you put the actual chip on.

http://pminmo.com/forsale/1X72805.pdf read page two in red and look at the picture of the holddown.

[sdantonio]

I was thinking of using a on top of board (as opposed to through the board) socket. I've identified a couple at digikey for about 75 cents each

[RCjunkie]

Were did you get them at i need 4.
Kevin Matney
Matney Models - contest winning fiberglass airplane kits for electric speed, EDF, and R/C pylon racing

[pminmo]

A3977SED and A3977KED are the same part, just the lead free version. Digikey has both:

Digi-Key - 620-1146-1-ND (Manufacturer - A3977SEDTR-T)

Digi-Key - 620-1144-1-ND (Manufacturer - A3977KEDTR-T)

[SammyF]

Hi everyone I'm not very well versed in any of this, however I'm trying to build or have a stepper motor and controller built. I found a controller on ebay that I think will work for my application. It has 4 Modes

1) Jogging forward/back 2)Momentary on off 3)speed up/down 4)Set points A-B

My question is would it be possible to wipe out mode 2 and 3 and replace them with mode 4 then just have 3 different sets of set points?

[tereroche4]

And practice before you put the actual chip on.