Large indicators MAX7219

Driver adapter for the manufacture of digital seven-segment indicators from LED strip.

Based on the MAX7219 chip.

It has a very large current margin.

Transistor Q9 is designed for PWM dimming from a separate input.

Planned to use a 12 volt LED strip, but can be used for other voltages.

It is possible to replace the transients with semistors and use them in an alternating current network (other modifications will be required).