The values ??of the elements relating to the area 200mV and 2V range, the values ??are different only for R2, C2 and R7. The area subject to 200mV value written in the first msetu, or the same as a typical scheme. The area is subject to 2V value written elsewhere. For R7 is considered to be the area of ??200mV instead of resistor inserted jumper wire. Displays which are used as the total anode, and having 10 connectors used and may SA52-11GWA or similar color as desired.
It is clear that there are not only two measuring zones, but it is possible to extend the measurement area with the corresponding series resistor at the input of the voltmeter. I recommend that the full scale of 200mV use only for use as a voltmeter, ammeter, for all other applications prefer to use a range of 2V, this is to be extended to 20V or 200V range area.
Display 3 1/2 digit, which means that the maximum display 1999 course with a decimal point is included if desired. Decimal point is connected through a resistor R8 to ground. It is also not necessary to use 4 Display, you can use them only 3 to see 999 or range 100mV, 1V, 10V, 100V.
Input connectors AND HI and IN LO may not be connected to a voltage that is outside the power value ICL7107. The circuit is the typical applications also vary according to the input part, because it is at the entrance of two resistors that protect the entrance from destruction in case of connection too high a voltage.