This circuit is from the 1983 Intersil Databook. The circuit has an A / D converter for display of 4 and a half digits being powered by a voltage of 9 V.
In this circuit of the 80's components of the time are used. The circuit controls a direct current...
This is the basic operational amplifier configuration for gain 10. R2 can be changed to other...
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...