555 Contest EntryFebruary 23, 2011 10:19 pm eric Projects Yes, it’s not really vacuum tube related, but I built an entry for the 555 timer contest. It uses an ICM7555, which is Maxim’s second source of Intersil’s CMOS version of Signetic’s original NE555 timer. Turns out the fact that it is CMOS is important for this particular circuit… My entry is an AM radio. The only active device (silicon, germanium, or otherw
