hi,
The LM3914 has 10 LED's which you want to display 0 to 30Vdc on, OK.
So thats 30v/10, ,, an LED will light for every 3V increase on the Vsig input.
This means you will have resistor divider across the 1.25V to 30V output of your power supply.
The divider will drop the 30V down to 10V for the Vsig input
I would use a 20K and a 10K divider.
So you connect the LM3914 as shown in this image.
Pins 6 and 7 are linked together, do not connect pin 6 to any other voltage
Do you follow OK.?
The LM3914 has 10 LED's which you want to display 0 to 30Vdc on, OK.
So thats 30v/10, ,, an LED will light for every 3V increase on the Vsig input.
This means you will have resistor divider across the 1.25V to 30V output of your power supply.
The divider will drop the 30V down to 10V for the Vsig input
I would use a 20K and a 10K divider.
So you connect the LM3914 as shown in this image.
Pins 6 and 7 are linked together, do not connect pin 6 to any other voltage
Do you follow OK.?
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