LED display for DC power supply

A

Abdur Rehman

New Member

• Oct 9, 2012

• #1

hello
i am new at electronics, i have made the 12V regulated DC power supply. now i want to maki a display for it , like if one volt is coming 1 LED glows if 2 volts are coming 2 LED's glows and so on.
some one said to use LM339 but i am not sure so can you help me Probably by circuit diagram

 

MikeMl

Well-Known Member

Most Helpful Member

• Oct 9, 2012

• #2

You can buy a **broken link removed**.

 

Last edited: Oct 9, 2012

A

Abdur Rehman

New Member

• Oct 9, 2012

• #3

yeah
but this is our project we have to make it on our own :|

 

MikeMl

Well-Known Member

Most Helpful Member

• Oct 9, 2012

• #4

Then use Eric's LM3914 calculator here on ETO

 

ronsimpson

Well-Known Member

Most Helpful Member

• Oct 9, 2012

• #5

Look at the attached data sheet. It is like 10 of the LM339s and more.

 

A

Abdur Rehman

New Member

• Oct 9, 2012

• #6

thnx it's look gud
i'll try then tell about it

 

A

Abdur Rehman

New Member

• Oct 9, 2012

• #7

thnx

 

MikeMl

Well-Known Member

Most Helpful Member

• Oct 9, 2012

• #8

If your instructor will not let you use the LM3914, here is something I came up with years ago. I needed a non-linear step progression to light each successive LED, so I had to tailor the resistor values to be other than linear steps.

 

Attachments

• FlapIindicator.jpg

  79.1 KB · Views: 134
• FlapIndicatorW.jpg

  99.7 KB · Views: 132

Last edited: Apr 9, 2013