The NotaBotYet Tally Helper 100 was designed to control tally lights on popular mic arms such as Yellowtec Mika products and others.  Most of these types of mic arms have a ring of multiple LEDS that are used to indicate which mic is live on the air.  These LEDs at 12 volts typically draw 30-40 … Continue reading Application Note: Using a Tally Helper 100 to Light Mic Arm Tally Rings with Axia GPIO