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25pin DSub cable tester

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avis1777

New Member
Hi everyone,

I'm trying to make a simple cable tester for 25 pin DSub cables. Can anyonr Please advise me on what i need and a diagram of how to configure the tester? Thank you

most grateful
avis1777
 

ericgibbs

Well-Known Member
Most Helpful Member
Hi everyone,

I'm trying to make a simple cable tester for 25 pin DSub cables. Can anyonr Please advise me on what i need and a diagram of how to configure the tester? Thank you

most grateful
avis1777
hi,
Is that a test for continuity only.?
 

ericgibbs

Well-Known Member
Most Helpful Member
Hi ericgibbs,

Yes only for continuity. Thanks again
I expect you want some indication when/which conductor is open circuit.?

Will it be acceptable to stop and indicate as each 'fault' is discovered.? or do you want to record all the faults in the cable and indicate all failures at the end of the test [ which will be more difficult to realise].

Test volts say 5Vdc at 10mA OK.???
 

avis1777

New Member
Hi,

I just need to check which line from the the 25 core cable is broken... As so a simple continuity check with perhaps leds to show the faults.

Thanks
 

ericgibbs

Well-Known Member
Most Helpful Member
Hi,

I just need to check which line from the the 25 core cable is broken... As so a simple continuity check with perhaps leds to show the faults.

Thanks
hi avis,
What if more than one wire is open circiuit, thats why I asked the above questions.:)
 

ericgibbs

Well-Known Member
Most Helpful Member
Ok sorry, it will be great if can stop as each fault is discovered..

Thanks
OK. thats a simple way to do it.

Couple more questions,
how many cables are you testing.?
Will a continuity test at 5Vdc at 10mA be acceptable,? are you testing to a Standard or just a quick in house test.?
 

avis1777

New Member
Hi,

25 core straight cable, 5vdc at 10mA will be great. its only for in house testing, reason being we get loads of faulty cable after use and it has always been very difficult testing each core with a meter.........:eek:

Thanl alot
 

ericgibbs

Well-Known Member
Most Helpful Member
Hi,

25 core straight cable, 5vdc at 10mA will be great. its only for in house testing, reason being we get loads of faulty cable after use and it has always been very difficult testing each core with a meter.........:eek:

Thanl alot
OK.?
Ill try to post a circuit by tomorrow.

Whats you location, so that we can suggest suppliers of components.

EDIT:
Are you able to source these components.?
HEF4520, HEF4067 , 74LS154 and HEF4093, 2 of each required
 
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