KF5N Radio Experimentation Site
T41-2 Switch Matrix Board
T41-2 Switch Matrix Board
The “T41-2 Switch Matrix Board” includes an array of 18 pushbutton switches. The switches are for menu and radio control functions.
The Github repository is here:
https://github.com/Greg-R/T41-2_Switch_Matrix
License
The T41-3 Main Board PCB design is licensed under the CERN Open Hardware Licence. A copy of the license is included in this repository. The license is also available via this link:
https://ohwr.org/cern_ohl_s_v2.txt
Digikey BOM
Here is the BOM for this board at Digikey:
https://www.digikey.com/en/mylists/list/F6FOAFWFOM
The Key to Good Switch Matrix Function
It is important to use the proper switch in the Switch Matrix Board. There are a few parameters that make this particular switch an optimal choice:
Please use this switch or an equivalent!
Build Tips
This is an easy board to build. Here are the recommended steps.
- Place and solder all surface mount components on the front side of the PCB.
- Insert all 18 switches into the front side of the PCB and hand solder them.
- Insert the JST connector into the back side of the board in the correct orientation and solder.
That is all!
High Resolution Photos
Links to photos of a fully constructed T41-2 Switch Matrix Board follow. Click on the image for high-resolution photos.
