Tally Light Controller

Tally Light system for Blackmagic Design video mixers

Flexible and easy to use tally light system.
This project is continiously developing.

This Tally Light System works with Blackmagic Design video mixers which have their tally information on the SDI outputs. The system is tested with the ATEM Production Studio 4K and the ATEM Television Studio HD.
Cabling is done with cheap CAT5 internet cables with UTP connectors. Length of cable up to 100 meters.

Tally Light System overview

Tally Light Controller in Teranex Mini - Rack Shelf

The Tally Light Controller fits in 1/3 part of a Teranex Mini- Rack Shelf. So you can store it nicely in your system. It has the same round front as other Black Magic Design units. The front in the current pictures are 3D printed in low quality until now.
The controller can control up to 8 tally Lights. All Tally Lights are numbered 1 to 8 and can be assigned to one of the 8 inputs.

Backside of the controller

Backside of the controller

On the backside of the controller we see the SDI input and an SDI loop thru. So the used SDI output of the mixer is still available.
The white UTP conjnector is the output to the Tally Lights or to the Wireless Transmitter.
Next to the right SDI connector you see the 12V input, which feeds the controller and all wired Tally Lights and the Wireless Transmitter.

Wired Tally Light

Wired Tally Light

All Wired Tally Lights are wired with CAT5 cables. Signal and power come through this line. There are two UTP connectors on the right side. Both are equal and are for input and loop thru. It has a cold shoe for mounting on a camera.
At the front there is a 10mm red LED. This light can be dimmed in 8 stages.
At the backside is a 5mm 3 color LED which is green in preview and red in Program state. The Tally Light is programmable for camera 1 to 8. This is done by a single button on the backside. Brightness of the front LED and the camera number are stored in EEPROM so keeps the value after power down.

Wireless Transmitter

Wireless Transmitter

This transmitter is used for sending data to the Wireless Tally Lights. The distance is about 50m because the receiver is equiped with an inside antenna. Next generation receivers will have an antenna like the transmitter. Then the distance will be about 150 meters (free of obstacles).
Frequency usage 2.4 GHz.

Wireless Tally Light

Wireless Tally Light

This Tally Light is battery powered (9V block). It has a cold shoe for mounting on a camera.
At the front there is a 10mm red LED. This light can be dimmed in 8 stages.
At the backside is a 5mm 3 color LED which is green in preview and red in Program state. The Tally Light is programmable for camera 1 to 8. This is done by a single button on the backside. Brightness of the front LED and the camera number are stored in EEPROM so keeps the value after exchanging batteries.