Ah initially i did not understand so i just played around in LTSpice and came out with what was in my mind. So here is it the R1 and R2 that needs to be adjusted ? R1 needs to be changed to a lower voltage than the minimum voltage of 3, correct ? R2 would remain same as that is the current limiting resistor for the LEDs.hi anish,
Thats exactly the same configuration that I posted in post #12.
View attachment 175456
View attachment 175455
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The lowest LED should be 2v and highest should 4.2v. Yes the led 0 should light up 2 and 9th one at 4.2v(approximately). Yes I had planned on to use dot mode.hi.
What is the minimum and maximum voltage you would allow on one battery.?
Also do you want to have LED #0 lit at the lowest battery voltage and LED #9 lit on the highest voltage.??
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I suggest you use DOT Mode on the LED's, as this will minimise the LED load on the battery.
Whats d/S ?
If you can get hold of a 3914, they've been discontinues a long time and NOS is getting a bit thin on the ground.In that case, the LM3914 is the classic way to do it for a single cell or battery but I am not sure it will behave as expected in your application.
Yes i do understand any two same values of resistor in series will always be half the voltage across it. Hence a 4 volt through R1 and R2 with resistance of 10k, 10k respectively would be 2v between the R1 & R2 and 2.5v would be 1.25v. basically all the actual input voltage is divided by 2.I guess you realize that the two resistors 13k and 10.9k are designed for a voltage range of 3V thru 4.2V.
It is the two 10K resistive battery voltage divider which makes the video's LM3914, measure a battery voltage 6V thru 8.4V
DatasheetWhats d/S ?
by Aaron Carman
by Jake Hertz