i need a schematic to drive a lm-3914. what i want to do is have 8 leds light up in order, and stay on until the eight led lights up , and then shutoff and start again. i will be using a 555 timer to drive the lm3914... thanks for any help

 

Hello,

You will need a sawtooth generator to create theb wanted effect.
The signal of a 555 will not be linear.
On this page of the EDUCYPEDIA you will find some links to the schematics:
http://educypedia.karadimov.info/electronics/analogsquare.htm

Bertus

 

Hello,

You will need a sawtooth generator to create theb wanted effect.
The signal of a 555 will not be linear.
On this page of the EDUCYPEDIA you will find some links to the schematics:
http://educypedia.karadimov.info/electronics/analogsquare.htm

Bertus

Figure 12 in the datasheet shows how to make a linear sawtooth.