The pulser generates pulses at a user-selected frequency of 0.5 or 500 Hz, with a pulse width of about 5 ms. If the input to be pulsed is already being driven high or low by another output, the pulser automatically pulses the input to the opposite logic state.
Logic-pulser - schematic

The pulser is powered by the circuit under test, and operates from supplies of from + 5 to + 15 V de.

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