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Topic: 4x4 Tactile Pressure Sensor Information (Read 105 times) previous topic - next topic

hbarot

Hello,
I was recently provided a 4x4 tactile pressure sensor. it is composed of 4 row and 4 column pads and has 8 pin as seen in the picture attached. There is no information or identification regarding this product. I Would appreciate any information on this sensor. Thank you.

Paul_KD7HB

Hello,
I was recently provided a 4x4 tactile pressure sensor. it is composed of 4 row and 4 column pads and has 8 pin as seen in the picture attached. There is no information or identification regarding this product. I Would appreciate any information on this sensor. Thank you.
Does Google show you any pictures of that device? If so, follow the links to the source.

Paul

hbarot

no i couldnt even find any images of that on the internet.

Paul_KD7HB

no i couldnt even find any images of that on the internet.
Then it must be custom device and you will need to use your Ohmmeter to trace out all the connections. Put a piece of tape on each pin and number them, then use the meter to see which numbers are connected to another. Make a spreadsheet showing the results.

Paul

hbarot

After much testing, it seems like it is a combination of 4 FSR sensors, with VCC supplied to column pins one at a time, and then reading the row pins in voltage divider configuration. I will need some kind of multiplexing code to read the values from all the columns.

hbarot

Then it must be custom device and you will need to use your Ohmmeter to trace out all the connections. Put a piece of tape on each pin and number them, then use the meter to see which numbers are connected to another. Make a spreadsheet showing the results.

Paul
Thanks for the information Paul

outsider

Might be just a 9 spot keypad, have you tried the keypad library?
https://playground.arduino.cc/Code/Keypad

Willpatel_Kendmirez

Might be just a 9 spot keypad, have you tried the keypad library?
https://playground.arduino.cc/Code/Keypad
And apart from the library itself, there's also a tutorial which may help you sort out the pins if necessary.

(I bought a membrane keypad last week, and thought it was stuffed as supplied. I set my meter to beep, and of the 16 buttons only 4 or so caused a beep. But luckily I noticed out the corner of my eye that the actual value on the meter was changing: turns out most of the buttons have resistance above (both of) my meter thresholds, yet good enough to work with the library.)




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