Hi guys, i have a resistive touchscreen of a cellphone (cect i9). i disassembled the cellphone and i've taken the touchscreen.
It has a plate with 4 wires, so i linked the 1st and the 3rd (i know that in resistive touchscreen pins are x+;y+;x-;y-) and i measured with my tester the resistance, and its value changes between 0.737 mA and 0.743 mA.
Now, how to interface it with arduino?
PS. I linked only y axis, do you know another way to link that tiny wires that is not to solder them with tin? xD
dlion:
with my tester the resistance, and its value changes between 0.737 mA and 0.743 mA.
So you put your meter into resistance measurement, and it gave you values in milliamps? Milliamps are current, not resistance.
Resistive touchscreens are pretty complicated. You may want to use a touchscreen controller, that you interface to the Arduino (instead of the touchscreen itself). This the first one I found searching google for "resistive touchscreen controller."
dlion:
Hi guys, i have a resistive touchscreen of a cellphone (cect i9). i disassembled the cellphone and i've taken the touchscreen.
It has a plate with 4 wires, so i linked the 1st and the 3rd (i know that in resistive touchscreen pins are x+;y+;x-;y-) and i measured with my tester the resistance, and its value changes between 0.737 mA and 0.743 mA.
I'm not exactly sure what you're measuring but it shouldn't be amps.
If it's resistance you were measuring, and you want 100 steps across the screen.... you have to measure with a resolution of 0.00000006 ohms. Not going to happen.