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Engineering-3 / E3-Touch_Sensor

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Touch Sensor - No Contact #1

Closed E3t1jump closed 5 years ago

E3t1jump commented 6 years ago

We have a large number of touch sensors that have a short in them somewhere. I'm not sure at this point if the headers are too small a gauge to make contact with the cable ends or if there may be a broken solder joint or something internal to the button element, or something else.

I will be soldering leads direct to the headers to see if this clears the issue (ergo, header pins not making contact with the cable ends) as a first test step. I will report back after this test.

EmbeddedMan commented 6 years ago

Do you mean they have an open? (I.e. broken solder joint would be an open, not a short.)

On Wed, Nov 14, 2018 at 8:28 PM Timothy Jump notifications@github.com wrote:

We have a large number of touch sensors that have a short in them somewhere. I'm not sure at this point if the headers are too small a gauge to make contact with the cable ends or if there may be a broken solder joint or something internal to the button element, or something else.

I will be soldering leads direct to the headers to see if this clears the issue (ergo, header pins not making contact with the cable ends) as a first test step. I will report back after this test.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/Engineering-3/E3-Touch_Sensor/issues/1, or mute the thread https://github.com/notifications/unsubscribe-auth/AAbeCEx-e5HKnBdzsco-gfPKTcbYlLoJks5uvNE6gaJpZM4Ye9Wu .

E3t1jump commented 6 years ago

Correction: Yes, open joint somewhere is the first guess. I'll test per my first post and we can proceed from there to determine if and/or where to find the open.

E3t1jump commented 5 years ago

Update: Observation: It seemed that wiggling the header intermittently corrected the "open joint behavior."

Tests Performed: I soldered leads directly to the header pins: "open joint behavior" unchanged. I re-soldered the headers to the board: "open joint behavior" unchanged. Wire harness was triple checked to assure there were no issues with the wires.

Noticed that simply rotating the touch sensor caused the "open joint behavior" to toggle on/off. Then, after a bit the sensor went completely unresponsive (no completed circuit behavior at all).

I will be shipping buggy sensors for review.

EmbeddedMan commented 5 years ago

Please and thank you. :-)

On Sun, Nov 18, 2018 at 9:31 AM Timothy Jump notifications@github.com wrote:

Update: Observation: It seemed that wiggling the header intermittently corrected the "open joint behavior."

Tests Performed: I soldered leads directly to the header pins: "open joint behavior" unchanged. I re-soldered the headers to the board: "open joint behavior" unchanged. Wire harness was triple checked to assure there were no issues with the wires.

Noticed that simply rotating the touch sensor caused the "open joint behavior" to toggle on/off. Then, after a bit the sensor went completely unresponsive (no completed circuit behavior at all).

I will be shipping buggy sensors for review.

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/Engineering-3/E3-Touch_Sensor/issues/1#issuecomment-439701404, or mute the thread https://github.com/notifications/unsubscribe-auth/AAbeCK5VwSWSNNUaT6TuQJBd-aodgwGAks5uwX1WgaJpZM4Ye9Wu .

E3t1jump commented 5 years ago

Found the issue is related to misreading of the silk markings on the back of the sensor coupled with publishing the same misreading in the sensor documentation in the E3 textbook. The sensor works as designed. The documentation will be corrected.