Here is an ICL7107 voltmeter is used as a display panel meter
from a capacitor bank. Display compact designed to fit its placement as
a display meter, which is very suitable to use seven segments LED. If
you prefer using the LCD display, it is recommended to use the ICL7106.
The voltmeter circuit uses a symmetric voltage + /-5V as power supply. -5V voltage can be easily generated from ICL7660 IC with +5 V supply. Digital voltmeter circuit supports a display 31/2 digits. The measurement range is of course the voltage divider at the input signal (pin 30,31) of the IC’s from.
ICL7107 Voltmeter Circuit Diagram
Below is the ICl7107 digital voltmeter circuit diagram, there are two pieces of IC 7107 serves as an analog to digital converter, and ICl7660 to provide a negative voltage-5V from +5 V power supply 7 Segments display serves to display results from a voltage measurement. Pin 30,31 of the IC is the input voltage to be measured with the option Low/High input. Perform wiring properly to avoid damage.
Voltmeter PCB Layout
Printed Circuit Board (PCB) of the ICL7107 voltmeter is designed very compact. Ensure that 40 of the pin is installed properly on the solder side of the board. Thus, the voltmeter should be kept as small as possible.
This is a homemade digital voltmeter designed in accordance with the
purposes of the designer. If you want to know more about how this
project done, please visit the following link, Kondensatorbank 1500J/900VDC. Follow the link, a digital voltmeter circuit To view other articles on the ICL7107 voltmeter.
The voltmeter circuit uses a symmetric voltage + /-5V as power supply. -5V voltage can be easily generated from ICL7660 IC with +5 V supply. Digital voltmeter circuit supports a display 31/2 digits. The measurement range is of course the voltage divider at the input signal (pin 30,31) of the IC’s from.
Voltmeter Panel Display
Below is the ICl7107 digital voltmeter circuit diagram, there are two pieces of IC 7107 serves as an analog to digital converter, and ICl7660 to provide a negative voltage-5V from +5 V power supply 7 Segments display serves to display results from a voltage measurement. Pin 30,31 of the IC is the input voltage to be measured with the option Low/High input. Perform wiring properly to avoid damage.
ICL7107 Voltmeter Schematic Diagram
Printed Circuit Board (PCB) of the ICL7107 voltmeter is designed very compact. Ensure that 40 of the pin is installed properly on the solder side of the board. Thus, the voltmeter should be kept as small as possible.
Voltmeter PCB Layout