Interfacing 4-wire Resistive Touchscreen with ATMega16 Microcontroller
Table of Contents:
1. First apply some flux paste neatly on the touch screen strip.
2. Take some solder on the tip of the soldering iron and apply it on the strip.
Spread it evenly so that the solder gets attached only to the copper part of the strip and make sure none of the 4 is shorted.
3. Now strip the tiny wires so that a part of the copper wire is out. Then tin then neatly using the soldering iron.
4. Then solder the wires one by one to the touch screen strip by putting the wire on the copper part of the strip (which has some solder now) and applying some heat gently using the solder iron.
5. When you are done with that then solder the other end of the 4 wires to the small PCB along with the 4-pin male header, each wire to one pin.
Note: If you don’t want to do so much of soldering work then it is better to buy a touch screen with a readymade breakout board (highly recommended). Trust me it saves a lot of time and energy.
Even readymade connectors are not directly compatible with all touch screens. For example I bought a Nintendo touch screen and a breakout board compatible with it. But it still needs a modification to work properly.
Problem: Thickness of the ribbon cable (or simply the strip) emerging from the Nintendo touch screen is 0.1mm thick whereas the connector fits well only with cables which are at least 0.3mm thick.
Solution: We add some insulation tape to the ribbon cable to make it thicker. Make sure you stick the tape on the back side of the strip where the copper part is not exposed and also cut the extra tape out or else the strip will not go inside the connector.
Next, you need to slightly slide out the black part of the breakout board connector. Insert the ribbon cable inside the connector and then slide back the black part to get a firm connection.
Now that we have now into the working and interfacing part.
As the connector is ready, now we can go into the working and interfacing part.
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