This interface shield circuit is from the 1983 Intersil Databook. The components used are uncommon today. ADCs are low-cost digital converters. The power source voltage must be 5 V.
This 1965 Philips circuit uses old company transistors like the BFY51 and BFY50. The circuit is...
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
This circuit was found in an old documentation, working with the previous circuit (CB19379E)...