LED display counter pulse, consisting of four digits of 50 cm. diodes made with high bright LEDs in red. The screen has external connection for receiving up to 999 pulses for controlling steps. Possibility of realization with ascending or descending account. Contador continuous falling edge of the pulse, with a minimum time between pulses of 1 ms and the input voltage of 5 V. same maximum. Power supply to 220 V.A.C. included within the screen. Digits diodes formed by bright LEDs in red.