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I 1707cpl 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 were having problems but someone has edited them out of my comments, why? Modify it to accept 0 to 1. PIN5 is the decimal point!!
I assembled the circuit, but only third 7seven segment is glowing, rest are glowing with very low brightness and its unreadable. 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.
And how will it affect the circuit?? Hi, with so many complaints of thsi circuit I think I might not should trust this electronics engineeeeeeeeer! Are dstasheet shure that decreasing the value for R4 dtaasheet increase the range?
The pin5 representing the dot is connected to ground only for the third display 7107cpo its position needs to be changed when you change the range of the volt meter by altering R4.
So avoid touching the IC pins with your bare hands. In simple words, the input voltage is compared to an internal reference voltage and the result is converted in a digital format. Your email address will not be published. The IC includes internal circuitry for seven segment decoders, display drivers, reference voltage source and a clock. Thanks for pointing the mistake.
For switching ranges used 4 pole 3 way rotary switch, first pole changes resistor and second pole moves decimal point pin 5 on indicator from D1 at v DC to D3 ie v DC. In case if your final drive device can give high datashert with suffucient drive current, then you require a common cathode disply such that when ever the disply input goes high that particular segment will glow. Built this cct yesterday and it works really well.
Hi Zernab go through the following site for full details http: Hi all, I made a PCB using a artwork sent by ejhgbb gmail. R5 and R4 are input potential divider. Hi Seetharaman, Any Circuit on the above, but suitable for measuring Amp. I made a digital voltmeter with ICL but display is not stable please help me.
Leave a Reply Cancel reply Your email address will not be published. Digital ohm meter by using IL N Abstract: Supply’ Temp Coeff of Analog Com m on5: The thing is displaying erroneous values. By my logic, I shoud be in the oposit… I want to make an amperpeter, I need the smallest range V. You may also like: R4 controls the range of the voltmeter. In the above circuit the maximum reading can be The seven segment displays must by common anode type. Feel free to send your PCB image to john circuitstoday.
Please anyone help me. Hi Seetharaman, Can you pls design a PCB for this lovely Circuit, or if you have one already,where can i download the same.
(PDF) 7107CPL Datasheet download
This voltmeater is working precisely. For calibration, power up the circuit and short the input terminals. Try Findchips PRO for cpl. The is tested using the mV. Existing andan industrial temperature range. Hi Mahamoud please go through the intersil datasheet for your requirement http: The and bring together an unprecedented combination ofdevice reliability.
The ACFM- also utilizes1.
CPL Datasheet ETC pdf data sheet FREE from
ItWafer Wafer Figure 1: Hello A similar project is available with PCB and the works, do check the same. The working of this electronic circuit is very simple. IC Pin diagram Abstract: The and bring together an unprecedented combination of high accuracy, versatility, andcurrent for V – Supply Current only Analog Common Voltage With respect to Pos. Includedinterface with a liquid crystal display LCD and includes a multiplexed backplane drive; the ICL will directly drive an instrument size light emitting diode LED display.