FelinæPurr (you can also write it FelinaePurr if your keyboard does not allow you to make that nice character) is a COMLynx compatible device. The COMLynx is the name of the Atari Lynx cable to connect two Lynx together. As the Lynx use RS232 protocol for that connector, it's also the name of devices that allow to connect your Lynx with your computer.
The particularity of the COMLynx is that it's completely half-duplex as the 2.5 jack used mix with RxD and TxD signal on the same ring.
This device can also be used for devices using the same approach for transmiting RS232 signal (yes there are many of them)
FelinæPurr is made around a FTDI FT232RL chip which is basically a USB to Serial adapter. It have some nice feature like the ability to blink LEDs when there are some Tx/Rx activity, which FelinæPurr use!
I may also make a nice lasercut box for it. Once made the DXF file will be available in the project files!
Part of the schematics was inspired by Zerosquare's Work for the original RS232/Lynx ComLynx
Felinae is the Subfamily of the Lynx, and Purr I think it's obvious what it mean. As this device is mainly intended for Atari Lynx and to make it chat with your computer, I found that name perfectly fitting it's role! And why the æ instead of ae? Because æ or Æ it's way cooler than plain ae / AE isn't it? Also it slightly change the pronunciation.
The correct one is roughly: fɛliːnɑːɛ pɜː using IPA for English
FelinæPurr is an OpenSource Hardware (OSHW) project and licensed under the MIT License. See the license file on github for more information.
Project on github: https://github.com/986-Studio/FelinaePurr
First you need to order the PCB and all the components
Then start with soldering the FT232RL (U1) chip, as it is the most complicated to solder.
Then solder the SN74 chip (U2) then all the resitors, capacitors and the LED.
You will need them to make a jump on the correct side on JP1:
- Center + USB if you want to power the board from USB
- Center + DEV if you want to power the board from the attached device.
Then you have to solder the 2.5mm / 3.5mm jack wire on the board, for that please look at the documentation on github to not get it wrong.