Like I said in the title, I am using the LM3914 IC to drive a 10 segment LED Bar-graph. The actual subsystem has the signal pin on the IC connected to a capacitor, thus displays the amount of charge the capacitor is holding on the Bar-graph.
I've done a test of my entire circuit on a breadboard and found that every subsystem – including the bar-graph circuit – worked a treat.
However, the LED segments on the Bar-graph are so dim that they are barely visible under bright light. Is there a way of making the 3914 increase the current through the LED segments to make them brighter?
Here is a rough schematic of the circuit I am using:
(Supply and resistor values are actual)
Any pointers would be extremely helpful thanks!
Here is the specific bar-graph if it is of use:
https://www.kingbrightusa.com/images/catalog/spec/DC10GWA.pdf
Best Answer
From the datasheet:
Since the voltage is 1.25V, the current in the schematic will be:
\$ {12.5\text{V} \over {1\text{k}\Omega+3.9\text{k}\Omega}} \approx 2.55mA\$
Reduce the resistances in the divider to about 1/8 of their current values.