THIS IS A LED POWERED CONTROL KNOB
USED TO CONTROL THE TEVO CONTROLS
use clear goop glue works great it is like hard rubber

USED FUSION 360

USED LED TAPE WITH RESISTORS IMPLANTED ALL READY RUN TO 12 VDC POWER
SUPPLY OR SET UP STEP DOWN POWER MODUEL 24 TO 12 VDC . U CAN GET ALL PARTS ON EBAY OR AMAZON,ALIEXPRESS
LEDS GLUE OR TAP ON OUT SIDE OF COVER OR DRILL HOLE FOR WIRES In BOX.
PRINT CLEAR CONTROL KNOB FOR BRIGHTNESS.
U CAN USE A COMPUTER FAN WIRRING FOR POWER TOO.
IF U USE STRAT LEDS U WILL NEED A 280 OHM RESISTOR 1/4 WATT