arbj2
Full Member level 3
Hi,
I am trying to make a voltmeter using the ICL7107 my circuit will be based on the circuit given in this link, **broken link removed**
The circuit is the fourth drawing on the page.
In my voltmeter I am planning to use a digital potentiometer instead of fixed resistances, the digital pot is the MCP41100 from Microchip, see link for datasheet https://ww1.microchip.com/downloads/en/DeviceDoc/11195c.pdf
It is a 100K linear digital pot.
Please let me know if this is feasible using digital pots...also what would the expected accuracy be.
I know the 7107 is used in digital voltmeters, and they are quite accurate is it possible to achieve similar accuracies if I make my my own voltmeter using the 7107 ??
I am sorry if the above description is sketchy as the idea is still in my head and I have not made any prototypes yet to get accurate information.
thanks
arbj2
I am trying to make a voltmeter using the ICL7107 my circuit will be based on the circuit given in this link, **broken link removed**
The circuit is the fourth drawing on the page.
In my voltmeter I am planning to use a digital potentiometer instead of fixed resistances, the digital pot is the MCP41100 from Microchip, see link for datasheet https://ww1.microchip.com/downloads/en/DeviceDoc/11195c.pdf
It is a 100K linear digital pot.
Please let me know if this is feasible using digital pots...also what would the expected accuracy be.
I know the 7107 is used in digital voltmeters, and they are quite accurate is it possible to achieve similar accuracies if I make my my own voltmeter using the 7107 ??
I am sorry if the above description is sketchy as the idea is still in my head and I have not made any prototypes yet to get accurate information.
thanks
arbj2