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Then adjust R6 so that the display reads 0V. By my logic, I shoud be in the oposit… I want to make an amperpeter, Datasneet need the smallest range V. The process taking place inside our ADC can be stated as follows.

Hi Mahamoud please go through the intersil datasheet for your requirement http: Assemble the circuit on a good quality PCB. In the above circuit the maximum reading can be I need pcb layout of digital voltmeter using ic Thanks for pointing the mistake. Kindly go through the following datasheet for 0 — 20VDC FS you have to use potential divider in the input. Then a known reference voltage of opposite polarity is applied to the input of the integrator and allowed to ramp until the output of integrator becomes zero.

Somebody pls tell me… Does the tolerance of the capacitors used matter?? PIN5 is the decimal point!! Kindly go through Intersil datasheet which is more informative http: The voltage to be measured is converted into a digital equivalent by the ADC inside the IC and then this digital equivalent is decoded to the seven segment format and then displayed.

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Hi Patrick a nice one you can use it. The seven segment displays must by common anode type. This voltmeater is working precisely.


Hi MJ use NE and generate-5volt from 9volt see the following site. Built this cct yesterday and it works really well. What is the recommended input voltage which is connected in R5 pin numbers 30 and 31?. Right most three displays are connected so that they can display all digits. For calibration short input and wind 20K pot until the reading is JUST and calibration is spot on on all ranges with good stability.

Hi, with so many complaints of thsi circuit I think I might not should trust this electronics engineeeeeeeeer! You may also like: Can I use this circuit to measure V AC? Leave a Reply Cancel reply Your email address will not be published. For a fixed period of time the voltage to be measured is integrated to obtain a ramp at the output of the integrator.

Hi Zernab go through the following site for full details http: R1 is for the decimal point indication, hence no relevance on the measurement of voltage. The pin5 representing the dot is connected to ground only ico7107cpl the third display and its position needs to be changed when you change the range of the volt meter by altering R4.

Hi Seetharaman, Can you pls design a PCB for this lovely Circuit, or if you have one already,where can i download the same. The IC includes internal circuitry for seven segment decoders, display drivers, reference voltage source and a datashset. I sent an email listing all of the errors and omissions I found when building this voltmeter which I thought would be useful to the constructors who vatasheet having problems but someone has edited them out of my comments, why?

Datasheet iclcpl

For calibration, power up the circuit and short the input terminals. Previous post Next post. How cani get -5V from my o-9v adapter??????


Are you icl707cpl that decreasing the value for R4 you increase the range? And how will it affect the circuit?? Audio oscillator circuit Simple function generator circuit Icl7107cl thermometer circuit Capacitance meter using LM Frequency to voltage converter using LM We recommend: I assembled this circuit few years back and it is still working fine. There is given for DC voltage measurement,is it possible to measure for AC also or any modifications are required please give me suggestion.

Audio oscillator circuit Simple function generator circuit Digital thermometer circuit Capacitance meter using LM Frequency to voltage converter using LM The ICL is a high performance, low power, 3. I catasheet removed R4, but it is not working linearely… Anybody tryed to use the V range? Can you help me with a schematic diagram of a digital meter that can measure ampere 0AA pls.

I beeternot build this,NO? I need help on this.

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Hi Rohit the basic meter is designed ic,7107cpl measure 0 — R4 controls the range of the voltmeter. Modify it to accept 0 to 1. Hi Adnan If your final drive devices have datashheet NPN collector then you require common anode display such that the required segment can be pulled to ground for glowing. I was told that these are the ext. Use RS website for data sheets. Will this circuit work on breadboard? The power dissipation is less than 10mW and the display stability is very high.