--Apple-Mail-5-668379395 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; format=flowed Hi I'm trying to connect a 3.3v GPS device to a 5v PIC, now I need to adapt the signals. I've looked back in the archives, and Brent Brown suggested the bellow, but I have a few questions. Should I add a 3.3v Zener too the RxD line to make sure it can't go above 3.3v ever? Also is there not a simpler way of configuring the TxD line? Are there chips for handling this sort of conversion? Thanks Ed -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu --Apple-Mail-5-668379395 Content-Transfer-Encoding: base64 Content-Type: image/gif; x-unix-mode=0444; name="New-1.gif" Content-Disposition: inline; filename=New-1.gif R0lGODdhIwMNAoAAAAAAAP///yH5BAAAAAAALAAAAAAjAw0CQALpjI+py+0Po5y02ouz3rz7D4bi SJbmiabqyrbuC8fyTNf2jef6zvcS4Av+hDRgxjhBEpcJJfPpfC6j0qr1inUAttyut5sNi8fksvmM Tsu26rb7DY+LqXIVva7gfu4MPr7k9zcSKBhCWDjDhrh4ocj4CBkpORnhSHkZYIm5ydnp+XLY95kJ qYlgShFqoDq6wNraBHske4K6imRke+pFy6PrmBuo9NpbbHzc9kuM7KPM/Awd/ba86oGrW0Vd5nxg OXzNqt0qPkr+aR7NLZ2lvu7+Du/WHs80T3+Pn2+ngS5feocNQrh8/TgV3HT/UFpAfVMSMnwIcVoT J5oWxrAY0ZfDjBw7GqxwcCMWkVcwDklFMCU+ksgsRsF1iqNJDC7zdIs50aPOnQxNgslTsSdLjF8m gvvJM6nSRyxLQRlacOBKlfea9ioqkFejXdWyuoo5kx1JrFq0Whh2U0smKmjDLn0L14WeHwHN3rJK yS3QQ3Mb2L0VN7BgOXxCAuuLBq81YiG5ro3lWBSUB3oBUaWnmFHlJH9dZS7kdnOlzkB3iAb0ebDq NKezIvWbetxY0jl1fLmNO7fu3bhBxl4N/KLXRnO9Ia5dEk/oYMYB40zSDHLk1lslV73c8fXd26Op 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