I am not sure, whether Volt meter with 2 significant figure precision will consist of just a few components.
I don't know if there's an voltmeter IC available, that can make your circuit with least number of component.
Here's some one circuit.
I am not sure, whether Volt meter with 2 significant figure precision will consist of just a few components.
I don't know if there's an voltmeter IC available, that can make your circuit with least number of component.
Here's some one circuit.
Thanks for your kind reply,,, https://www.coolcircuit.com/project/meter/
this is a good suggestion but I want on 89C51 or 89S51, I want to experient this project that is why I dont want to buy it.
regards
You can have another option of using ICL7106, its a complete Volt meter and easily available. It is for LCD display and for LED display you can use ICL7107.
I think he might be using 2 * 12 V batteries=24Volt DC. Mostly found in UPS system. So maybe he want's to measure from 0-25V. I think this voltage level refer to the DC voltages of the battery.
I think he might be using 2 * 12 V batteries=24Volt DC. Mostly found in UPS system. So maybe he want's to measure from 0-25V. I think this voltage level refer to the DC voltages of the battery.
Thats right,,, I am using it in UPS for the battery level check. My mean aim is to understand that how uc works with A/D in volt meter and current meter. I really want to use an external A/D network with Atmel 8051.
You first hook up your MCU with A/D converter.Do some test on it. Write your code with help from it, use multi turn Potentiometer for various Analog voltage.
Remember, for current measurement you need to do Current-Voltage conversion.
You can build it by just using ICL7107 IC avilable at any component vendors. refer the datasheet where you will find an easy application schematic of the same. On the other hand you go for a ready to assemble kit with all the components, PCB and description, designed with the same IC, available at www.united77.com/projects.htm.
you want to monitor UPS or the battery in the UPS ??
If its battery then I am thinking just voltage may not be enough, you have check the current given out or taken in by the UPS...