This is a HP LED demonstrator from the early 1990s. Note the silicon carbide (SiC) blue LEDs. The demonstrator is set at 5mA of current, displayed on the bitmapped green display at the bottom.
Don't know who the maker was but I remember when my dad brought home a blue LED to me. They were so expensive they where delivered one at a time in a small jewelry box from the local electronics store(!)
Don't know who the maker was but I remember when my dad brought home a blue LED to me. They were so expensive they where delivered one at a time in a small jewelry box from the local electronics store(!)
HifiCentret 11 months ago
Oh the days when hp used to actually make stuff !
volestrangler 1 year ago