Dear SgtWookie,
I found your posting on the forum regarding the use of an LM3914 to drive an LED bargraph:
Thank you!!
M.
I found your posting on the forum regarding the use of an LM3914 to drive an LED bargraph:
However, I am needing to adapt the above referenced circuit to monitor between 3.0 - 3.6 volts (.06V led display steps). Is it possible to do this with the LM3914? And if so, what adaptations would be required to the circuit you linked to:http://www.national.com/images/pf/LM3914/00797001.pdf?Attached is a schematic of a 0v to 5v 10-LED Bar Graph voltmeter made using a National Semiconducor LM3914 IC and a 10-segment LED bar display, with a couple of resistors and a capacitor.
To change it to read from 0v to 6v, replace R2 with a 4.6k resistor. That's it.
You can power the circuit with a 9v transistor battery.
It does not get a whole lot more simple than this to build a 10-segment voltmeter display at home.
The schematic came from page 2 of National's datasheet.
The datasheet is available from this page:
http://www.national.com/mpf/LM/LM3914.html
Direct link to datasheet:
http://www.national.com/ds.cgi/LM/LM3914.pdf
Jameco supposedly carries the LM3914N-1/NOPB for around $1.55, but their server is down at the moment.
Jameco does not have a minimum order like many suppliers do.
Thank you!!
M.