Hello all!
I am working on making a circuit to replace an analog volt meter using an LM3914 and a Kingbright red 10 led bar graph display.
I have a max supply of 12v and also 3.3V to work with. The bar graph display needs to have a range of 2V to 9v and run in Dot mode with 20ma to the LEDs. I would like to be able to adjust the range to fine tune for the circuit application.
I would like to actually have two switchable ranges. One from 1V - 7.9V and 2.9V - 9.3V. I would use a toggle switch to change ranges. Right now I have it bread boarded and isn't quite working correctly. I would like to just start from scratch again and not reuse my circuit.
Please help?
Thanks!
_Chris
I am working on making a circuit to replace an analog volt meter using an LM3914 and a Kingbright red 10 led bar graph display.
I have a max supply of 12v and also 3.3V to work with. The bar graph display needs to have a range of 2V to 9v and run in Dot mode with 20ma to the LEDs. I would like to be able to adjust the range to fine tune for the circuit application.
I would like to actually have two switchable ranges. One from 1V - 7.9V and 2.9V - 9.3V. I would use a toggle switch to change ranges. Right now I have it bread boarded and isn't quite working correctly. I would like to just start from scratch again and not reuse my circuit.
Please help?
Thanks!
_Chris