Bluetooth LE CAT control for use with RumlogNG / RumlogNG2GO and KX2
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Build a Bluetooth LE dongle to use CAT control wirelessly for Elecraft KX2 & Rumlog.
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- Creative Commons — Public Domain
Print a case to mount your Bluetooth LE CAT control dongle for use with RumlogNG & RumlogNG2GO.
For this build, I used a TRRS socket in the case. The battery ground is soldered to the sleeve. Ground for the circuit is soldered to Ring 1. When you plug in a TRS 3.5mm cable, this closes the circuit and turns the device on.
The cover fits snug. I hold it closed with label tape.
For instructions on how to build, see the forum thread here:
https://dl2rum.de/forum/viewtopic.php?t=840
Parts list:
Adafruit Bluetooth LE UART Friend
https://www.adafruit.com/product/2479
MakerFocus 2000 mAh lips battery (bigger than needed but it's what I had.)
3.5mm TRRS breakout board
Max3232 breakout board
USB C charge board for 1s Lipo battery
Also needed is wire for hookup. I used 28 ga silicone wire for power connections For signal connections I used 30 ga silicone wire.