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Subject: Help me build an cartridge tester

Date: 03/23/00 at 5:33 AM
Posted by: Peter Lingman
E-mail: sdtp@telia.com
Message Posted:

Can anyone supply me with some hints about the project i'm working on.
The project is an cartridgetester for private use.
Here comes the problem.
I have an cartridge that has 14 contactpoints and the reference point
is nr 1. If i measure between point 1 and 2 or 1 and 3 and so on i get
0,35 Ohm between the points. That shows that the cartridge is ok. But
if i get 0,65 ohm it is damaged, If the cartrigde is ok i want an green
led to light up( one LED for all points) it should not light up when
the cartridge is faulty. Here comes another explaination. if i put +1V
on pin 1 and i reed 0,8V at the other pins the led will light up. But
when the voltage is higher than 0,8V the led will not light up, bacause
the cartridge is faulty.
If anyone can help me with this you gonna have your name on the label
who have helped me do develope this product.
If you have any question feel free to mail me at: sdtp@telia.com
or by phone +46 54 876887 Sun-Thur 11-11 GMT

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