On Sun, Nov 3, 2019 at 7:33 PM Dennis Wage <[email protected]> wrote: > > > I am trying to make a home brew cable for chirp for the Yeasu ft2900. > > I have an old prolific uv5r that's already been cut in half. Inside are a > red, white and black wire. > > If any one knows what the red, black and white wires in a prolific uv59 cable > are for email me off list please. > > The 2900 only needs data and ground, and I know which pins of the rj12 they > go to. > > Dennis M. Wage (W9BOQ) >
Hi Dennis, You probably won't need any of the existing wire. On many programming cables the USB end has a cover that can be easily separated and removed. That will give you access to 4 outputs of the USB UART. 5V TxD RxD Gnd >From there you will have to build an small bit of circuitry that combines the 4 down to the 2 required for the radio. RX/TX Gnd After googling I see a circuit uses for (4) 2N7000 transistors and (4) 4.7k resistors to do the job. There may be others. https://forums.qrz.com/index.php?threads/diy-make-your-own-programming-cable-ftdi-cable-for-1-50.502031/ Good luck with the project and tell us how it works out. Jim KC9HI _______________________________________________ chirp_users mailing list [email protected] http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to [email protected] at [email protected] To unsubscribe, send an email to [email protected]
