Another Project Update – Headphone Tub Amp

So I received my PCB’s in the mail a week or two ago now.  They were wrong. Within the CAD drawing the actual dimensions of the board were incorrect. If you reference the picture below you will see that there are gray holes in the 4 corners. Those symbolize no copper through holes for mounting. Well the way the Eagle CAD file is setup, the PCB fabricator see that as the outside edge of the board. So the traces stop in alignment with those dimensions, as well as the actual board itself get clipped. This is no good. Results in missing Ground and 12v traces, as well as a few components don’t make it onto the board.

Here’s were things get really good though. I was going to live with this problem and just eat the 20 bucks. I emailed OSH Park just looking for help with my CAD file. Not only did Laen at OSH fix my CAD file, rather quickly, but he refunded my money, apologized and said my next boards would be on them. You don’t find many places anymore that give service like that. I can’t recommend OSH Park for PCB work more. What a great company!!

So presently I’ve resubmitted the corrected CAD files and there already at the fabricators.

Eagle CAD

OSH Park



74xx Contest Prize

7400 Contest

These are terrible pictures but I wanted to get something up right away to show appreciation for my prize to the 7400 folks. Now what this is, is a device that takes the 20-pin connector from a computer power supply and give you used power points to run things. As you can see there’s a Ground, 12v, 5v, 3v and a -12v points. There’s LED’s from each volt, a powered LED and a device on LED. Of course at the top right next to the 20-pin plug the push button, On/Off switch.

154690_736810190093_757913963_n 483499_736813139183_1775580102_n


Tube Headphone Amp ***Update***

hJust a quick follow up entry to the Tube Headphone Amp project. I’ve received updates that my PCB’s are back from the fabricator and are being processed. Specifically they are cutting down the master board into the individual orders and hopefully mine will be shipping out soon. I’m really rather excited about the project. Between getting married and this project, 2012 will end out with a hell of a bang for me. Just to specify, I did yes mention my fondness of marriage and this electronics project together. Picture this, your holding a 40 foot ladder and placing those two things on the ladder I can assure my fiancee, should you make it over to reading this post, the marriage is well up at 40 feet. My amp is probably rung number 4.