My first Frequency Counter designed by Hewlet Packard had at least 50 vacuum tubes. Each digit was repsented by a vertical column of neon light bulbs labeled 0 thru 9. I believe it went as high as 10 Mhz.
After it died, I discovered that it had a temperature controlled oven with a 100 Khz Crystal inside for the time-base and also several diiodes used for other purposes. I believe it was one of the first counters made using combined solid state and vacuum tube technology circa 1956 give or take a few years. I purchased it in 1976 at a local school rummage sale for just $5.00
New versions of BASF's Ecovio line are both compostable and designed for either injection molding or thermoforming. These combinations are becoming more common for the single-use bioplastics used in food service and food packaging applications, but are still not widely available.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This radio show will show what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.