diff --git a/firmware/analog-ch3/main.c b/firmware/analog_ch3/main.c
similarity index 100%
rename from firmware/analog-ch3/main.c
rename to firmware/analog_ch3/main.c
diff --git a/firmware/analog-ch3/makefile b/firmware/analog_ch3/makefile
similarity index 100%
rename from firmware/analog-ch3/makefile
rename to firmware/analog_ch3/makefile
diff --git a/firmware/3-position-ch3/main.c b/firmware/three_position_ch3/main.c
similarity index 100%
rename from firmware/3-position-ch3/main.c
rename to firmware/three_position_ch3/main.c
diff --git a/firmware/3-position-ch3/makefile b/firmware/three_position_ch3/makefile
similarity index 100%
rename from firmware/3-position-ch3/makefile
rename to firmware/three_position_ch3/makefile