Not sure why you are surprised that applying 5V signals to a PIC running at 3.3 V is a problem. Either level shift the adapter to 3.3 V signals or run the PIC at 5V.
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Re: Usb to ttl modules - connection to pics at 3.3v
Not sure why you are surprised that applying 5V signals to a PIC running at 3.3 V is a problem. Either level shift the adapter to 3.3 V signals or run the PIC at 5V.
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Re: Usb to ttl modules - connection to pics at 3.3v
Simple solution is to use 2x transistor inverter(http://hyperphysics.phy-astr.gsu.edu...tron/bufi2.gif), or optocoupler on USB Tx pin...
Or use one inverter with transistor if your pic suport inverted UART input.
Last edited by pedja089; - 4th March 2015 at 15:47.
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