We found this circuit in the March 1992 issue of Radio Electronics magazine. The circuit has a range from 1.25 V to 1 kV. The formula for the voltage values is given.
Using a 4046 PLL this circuit recognizes a 1.6 to 1.8 kHz tone by driving an output LED. The...
May 2017 - These new Digital to Analog converters from Texas Instruments, available from Mouser...
We find this circuit in the 80's own component manual. The power supply should be from 4 to 30 V...