Abstract: A logic pulser is disclosed which provides controlled pulses for stimulating a digital logic circuit under test. The pulser is serially programmed, e.g. by means of a manually operated push button switch to generate single pulses, continuous streams of pulses, or bursts of pulses.The pulser may include a visual output indicator such as an LED which flashes in a predetermined sequence to indicate in which mode the pulser is operating.The pulser may also include output circuitry which sets the voltage and automatically adjusts the width of the output pulses to provide appropriate net charge to different types of digital circuitry.