KFDShield™

The KFDshield™ is an open-source Key Fill Device compatible with the P25/TIA-102 AACD standard. In short, it is a shield that transforms your Arduino or other footprint-compatible microcontroller into a device capable of performing keyloading and other key maintenance operations on compliant Project 25 digital radios. The KFDShield™ comes with both a 3.5mm TRS jack (aka a headphone jack) and a Euroblock style detachable screw terminal connector for the keyfill output. With both connectors it gives the ability to have both more polished cables and the ability to hook up whatever you need at a given moment. Note that these are wired in parallel and weird things can happen if you plug in two radios at once – so don’t try it. Additionally on the KFDShield™ are some buttons and a footprint for an OLED screen – soon to be carried in the store. This allows for future standalone applications so you can perform certain keyfill operation in the field without the need for a computer. Or, if an OLED isn’t up your alley, you can ditch it and use the prototyping area underneath it to build a custom circuit.

For more info and the relevant software, check out the GitHub link: https://github.com/omahacommsys/KFDTool

Normally sold at: https://store.omahacomms.com/product/kfdshield/
I have done a small production run from the open source files on the github.

Software Download:

PC: https://github.com/omahacommsys/KFDtool/releases/download/1.7.3/sw.zip
Arduino: https://github.com/omahacommsys/KFDtool/releases/download/1.7.3/fw.zip