Bang & Olufsen LED Bargraphs

Bang and Olufsen are a Danish audio company known for their very high end design. This was one of my first designs at Three-Five. The design itself is quite simple, but the complexity lay in the wire bonding. To get the design just right, some of the bonds had to be as long as 4mm.  This is a very long wire bond and getting that wrong can lead to low production yield.

Green and Red LED Bargraph

Some very long bond wires

The good news was the factory was ok with the bond wire length and the units went into production.  What I wish I knew is what system these went into.