eBay Hot Air Rework Tool Review

Based on Dan’s review and Dave Jones’ review, I picked up a Kendal 899D hot air/soldering iron rework station off of eBay for about $80.   These tools seem to be good value for the money.  The hot air section works well enough, though the soldering iron has uninspiring performance at best.  They are available on ...

More Boards!

Another purple envelope was waiting for me in my mailbox when I arrived home this evening.  I noticed that Laen had mentioned he shipped the January 9th boards out on Saturday, but I didn’t expect to receive them essentially “next day” via USPS first class. For the most part, the boards look great.  The only ...

The Hammer

I thought I’d try to get one more design into the January 23 Laen PCB order.  For the new CNC electronics setup, I’m going to be using a 3.5″ form factor Atom PC motherboard.  It unfortunately does not have a parallel port, which I need to talk to the FPGA card.  However, the board does ...

Final PCB for the CNC Done (for now…)

Finished my fourth board in as many weeks, finishing off the bare minimum of boards I need to get the CNC mill back up and running. This board mounts inside the machine itself, and connects via a cable back to the main PCB in the control. This board connects via screw terminals to the various ...

Soldering Techniques from Youtube 4

Ran across this:

First pcb.laen.org PCBs Received!

A sparkly purple metallic bubble wrap package was waiting for me in the mailbox this evening when I arrived home.  I knew that it had to be the boards that I sent out back on January 2, arriving just a few days over the ~2 week time generally predicted by Laen.  The quality of the ...

CNC Breakout Board Done

My latest board is designed, laid out, and hopefully safely in the hands of Laen over at Dorkbot PDX. This is the main “breakout” board for the CNC electronics cleanup.  It connects to my fancy new Mesa Anything I/O FPGA interface card, and provides some protection and signal conditioning before connecting to the myriad of ...

Another PCB Sent to Fab 4

I’ve completed the design and layout for another PC board, all part of the CNC milling machine electronics cleanup project.  This one is a nicer version of the isolated PWM to +/-10VDC output circuit, which I had prototyped on perfboard a couple weeks ago.  This circuit is used to drive a fancy KBMG-212D DC motor ...

Shaking off the Rust 3

It’s been a long, long time since I’ve done a PC board layout.  Like, probably on the order of ten years.  I think I may have done one design for work somewhere in the last ten years, but as far as I remember, the last thing I did for my own edification was the 6-layer ...

Ampeg Bass Amp Repair Part 1 3

I’ve had my uncle’s broken Ampeg SVT-4 Pro sitting down in my electronics lab for a couple of years now.  The story was that the amplifier failed before a gig, with output being practically nil, but just barely audible.  Not long after it stopped working, we tried a few simple things to fix it to no ...