Lab.gruppen LUCIA 240/2M - Manual (Page 21)

15. Appendices
LUCIA Operation Manual rev 1.0.0
21
A resistor ladder selector can be used to perform selection of up to 4 different alternatives. The total impedance
should be between 1k and 100k ohm and one way to do it is as illustrated below (this is also how the Lab.gruppen
accessory is made).
The May 2014 release of the Application Browser software allows customization of selections and voltages for
each of the select positions.
Vcc
GND
GPI
Position: 1 , 2 , 3 , 4
1
2
3
4
10k 10k 10k 10k 10k
For functions like push to talk and mute all a simple contact closure can be used with LUCIA M. It should be
connected between ground and GPI.