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.

Register Log in

7017CPL thermometer - problem- nothing on display

Status
Not open for further replies.
M

mohsinshaheer

Newbie level 3
Joined
Jan 12, 2010
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
Pakistan
Activity points
1,301
7017CPL thermometer

hello all,
I am making a digital thermometer using WS7107CPL(same as ICL7107CPL) but the problem is that it is not givin anything on the display. I have replaced the IC and re built the entire circuit. but was unable to find the problem. can anyone help? The circuit I have built is the one given in datasheet in "TYPICAL APPLICATIONS" section, under "reccomended components for 2V full scale" - figure 15 on page 13.. I have selected 2V full scale as I am using LM35 as temperature sensor. and its output is 10mV/degree C. can anyone tell what i may be missing or what might be causing the problem? ONE MORE THING. I have also tried to simulate the circuit on PROTEUS 7.1. it also gives nothing on the display.
regards
 

please post the schematics.
 

the schematic to circuit i mentioned
46_1263481947.jpg
[/img]

Added after 6 minutes:

in on the other side of IC are
pin 1= V+
pin 20=GND
rest go to 7 segment displays
 

please check the part they have two versions ICL7107 and ICL7107R in one type pin no 1 is V+ and the other Pin no 1 is OSC1
 
thanx. but the IC is right one.
the problem is solved. the 2 ics i tried were damaged. i got another ic and it worked fine. thanks for help. :)
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top