i am trying to build a digital voltmeter using discrete components i.e 74ls90, 7447, AND gate lm324 comparator, and D-latch to reset it. Can anyone please help me with it???

Talal91 · ‎11-27-2010

i am trying to build a DC digital voltmeter using discrete components i.e 74ls90, 7447, AND gate lm324 comparator, and D-latch to reset it. Can anyone please help me with it??? Reply ASAP please

Henrik_Volkers · ‎11-29-2010

What principle do you want to use? (single/dual slope, U->F, sigma delta or ??? )

Any target resolution?

The old appnotes from linear point out some schematics ...

Greetings from Germany
Henrik

LV since v3.1

“ground” is a convenient fantasy

'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'

Multisim and Ultiboard

i am trying to build a digital voltmeter using discrete components i.e 74ls90, 7447, AND gate lm324 comparator, and D-latch to reset it. Can anyone please help me with it???

i am trying to build a digital voltmeter using discrete components i.e 74ls90, 7447, AND gate lm324 comparator, and D-latch to reset it. Can anyone please help me with it???

Re: i am trying to build a digital voltmeter using discrete components i.e 74ls90, 7447, AND gate lm324 comparator, and D-latch to reset it. Can anyone please help me with it???