| View previous topic :: View next topic |
| Author |
Message |
bojidarmlv
Joined: 17 Mar 2009
Posts: 3
|
| seven segment display |
 Posted: Thu Apr 30, 2009 2:26 pm |
 |
|
Hello,
I want to make voltmeter with PIC and seven segment display. Can you tell me driver for that LED display? Thank you. |
|
 |
Guest
|
|
| Posted: Fri May 01, 2009 1:46 pm |
|
|
Hi,
Is your requirement to absolutely use an LED display?
I just made a very nice voltage and current display for a bench top power supply using a PIC and a GLCD display. I designed my own large fonts for the GLCD so that the numerical values would be very easy to read from a distance.
Richard |
|
|
asmboy
Joined: 20 Nov 2007
Posts: 2128
Location: albany ny
|
| making sure it can work |
| Posted: Fri May 01, 2009 1:59 pm |
|
|
Just a quick question for the poster - RE your meter desire.
In order to decide that i want to help, i need to know the answer to two questions:
1- If i put 3 ( three) 4.99K resistors in parallel and connect them across a 5V power supply - how much current will flow?
2- What is the impedance in ( in ohms) of a 1uf capacitor if you measure with
a 1V , 1 khz signal
3- what is the impedance at 3v 1 khz?
4- the PHASE Angle with said capacitor in series with 1000 ohms resistor?
any 2 will do - extra credit for answering all 4
   |
|
|
bojidarmlv
Joined: 17 Mar 2009
Posts: 3
|
|
| Posted: Sun May 03, 2009 9:54 am |
|
|
| Anonymous wrote: | Hi,
Is your requirement to absolutely use an LED display?
I just made a very nice voltage and current display for a bench top power supply using a PIC and a GLCD display. I designed my own large fonts for the GLCD so that the numerical values would be very easy to read from a distance.
Richard |
Yes, I must use LED display. I don't know how to initialize the result. May be with some driver. |
|
|
|
FAQ 
Search
Register
Profile 
Log in to check your private messages 
Log in
