Hello,
I am working on a project with a keypad recording device. The problem that i am having is this. When i test the device pins, the pins that are connected to the keypad matrix it gives me Mv ranges that are too high. There is a very small amount of current in those pins for example when i use the multimeter and put the + on pin 1 and the - on pin 3 the Mv rating is just to high, in some instances it even gives me a voltage rating of about 3.6 v which is the same voltage battery (3.7) on the device it self.
I can not do any circuits changes or additions to the device it self, my question is this.
What can i use to filter out this current, can? Can another device be created to be attached to the recording device so it can clear out the current?
Please help.
Thank you,
Armen
I am working on a project with a keypad recording device. The problem that i am having is this. When i test the device pins, the pins that are connected to the keypad matrix it gives me Mv ranges that are too high. There is a very small amount of current in those pins for example when i use the multimeter and put the + on pin 1 and the - on pin 3 the Mv rating is just to high, in some instances it even gives me a voltage rating of about 3.6 v which is the same voltage battery (3.7) on the device it self.
I can not do any circuits changes or additions to the device it self, my question is this.
What can i use to filter out this current, can? Can another device be created to be attached to the recording device so it can clear out the current?
Please help.
Thank you,
Armen