29-12-2013, 05:18 PM
send me about
digital voltmeter over view ,implementation,futer sope..
my mail id :ranga.kesagani[at]gmail.com
29-12-2013, 05:18 PM
send me about digital voltmeter over view ,implementation,futer sope.. my mail id :ranga.kesagani[at]gmail.com
01-01-2014, 11:00 AM
To get full information or details of digital voltmeter please have a look on the pages
https://seminarproject.net/Thread-pic-ba...tmeter-ppt https://seminarproject.net/Thread-digital-voltmeter https://seminarproject.net/Thread-digita...volt-meter if you again feel trouble on digital voltmeter please reply in that page and ask specific fields in digital voltmeter
19-05-2014, 04:43 PM
Digital Voltmeter
Digital Voltmeter.pdf (Size: 199.94 KB / Downloads: 159) A voltmeter finds its importance wherever voltage is to be mea- sured. Here we present an easy- to-build and accurate digital voltmeter that has been designed as a panel meter and can be used in DC power supplies panels or where it is necessary to have an accurate indication of the voltage. Circuit description The circuit uses an analogue-to- digital converter ICL7107 made by INTERSIL. Fig. 1 shows the pin detail of IC L7107. This IC incorporates in a 40-pin case all the circuitry necessary to convert an analogue signal into digital and can drive a series of four seven-segment LED displays directly. The circuit can display any DC volt- age in the range of -1999 volts to +1999 volts. It operates off ±5 volts. In order to understand the operat- ing principle of the circuit, it is neces- sary to explain how the ADC IC works. An analogue-to-digital converter, better known as a dual slope converter or integrating converter, is generally preferred over other types as it offers accuracy, simplicity in design and a relative indifference to noise, which makes it very reliable. Construction An actual-size, single-side PCB layout for the digital voltmeter is shown in Fig. 3 and its component layout in Fig. 4. Connection points for decimal point and for range-selection resistor are provided on the PCB for connecting rotary switch S2. IC base is used for IC1. Rotary switch is fitted outside the PCB. Connections from the PCB to the rotary switches are made using suitable lengths of shielded wire |
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