Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Varing Alphanumeric LCD contrast

Status
Not open for further replies.

NewbeeAVR

Junior Member level 2
Joined
Dec 2, 2017
Messages
21
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
195
Hi I bought 16x4 (white on blue) LCD JHD brand from store. But it's contrast is set to high by default. Using potentiometer can not give any variation. What may be the problem?
 

In the following data sheet they have given 5v as the supply voltage. I am using 12v adapter and 7805 to get 5v.

**broken link removed**
 

Hi,

This is not a complete datasheet....

But it says contrast voltage typ is 4.7V. How did you generate this 4.7V?
Did you verify the voltage with a DVM? If not, then do it.

Klaus
 

And observe the contrast adjustment from different angles or points of view.
 

Show your circuit, potentiometer wired wrong?
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top