The idea for AddOhms #8 has been around for quite some time.  I’m always trying to find ways to explain why current limiting resistors are necessary.  So while working in the shop one day, I decided to play with some LEDs and a bench-power supply.  Then I decided to record what happens.

Short build-lapse video of building up the front panel “matrix” used in BinBoo.  This isn’t a true LED matrix.  Instead it combining all of the LEDs into a common Anode, since the Cathodes are all controlled by individual outputs of the TLC5940. I decided to wire up 16 LEDs, even though a binary clock only needs 11 or 12.  This gives some flexibility to other uses for the box, like a random sci-fi computer pattern.…

How many times have you been part way through ordering parts for a project when you realize the distributor you are using, doesn’t have any of the part you need in stock? Or maybe you want to design a kit and compare prices of parts. This is where findchips.com comes into play. This awesome free resource will scan inventory across a variety of distributors for a given part number.  Not only will you see inventory levels but it is also a fast way to compare prices.

Several months ago I started a project to build a Binary Clock, using a Laser Cut enclosure.  The plan was to use Ponoko’s laser cutting service.  Looking through the materials available, I decided to use Bamboo.  Knowing I was going to build a Bamboo enclosure for a Binary clock, helped me come to the name BinBoo.  Even though I call it a Binary Clock, it is actually a BCD clock… There are still a few…