Welcome to the N1IR Electronics Website. Totally off the cuff, one take, unrehearsed video projects for anyone interested in amateur radio, electronic design, makers, hardware hackers and science.


Get off you duff and build something!
Training the hand and mind since 1982.

Friday, October 28, 2011

Greeting all,

For this blog I'm reviewing the Spark Fun Electronics Bench Top Power Supply. Overall this a a great kit for the beginner in electronics or robotics, it breaks out your common voltages of 3.3V, 5V, 12V and -12V Let start off with the classic hits:

Hits:
High quality PCB easy to solder.
Reuse of box as enclosure
24 pin ATX connector (Digikey P/N WM21362-ND). newer ATX supplies!
Standoff and hardware, nice touch
Fused outputs
LED power indicator

Now for the Misses:

Where is the wire to connect the binding posts? None included?
Okay quality binding post, not the worst I've seen but okay.
Could use a picture of fuse clip orientation, it was confusing to my students.
Need to move pads over a bit for binding post wire connection, they are very close to nut and could short to ground (this happened to one of my students)


Items I changed from the original.

no points taken for these items but may want to consider for next design.

Used different colors for different voltages.
Fuse in a weird position (moved fuses to under side of board)

Newer design

Stay tuned.....in the next few weeks when I redesign this and add some other features such as an adjustable plus and minis voltage using the LM317 and LM337. Also a redesign for a single sided PCB, this will make it easier for use to make with our T-Tech Milling machine.