An electronic system produces a train of electrical pulses or signals for controlling the dispensing of materials in different amounts or proportions, such as desired in the automatic batching of concrete. By control settings preset on a main electronic decimal counter, a prescribed number of pulses is delivered by the system to a mechanical analog device which in turn controls the material-dispensing mechanism. Additional presettable electronic counters are combined with the main decimal counter to achieve any number of batch formulations proportioned on the basis of arithmetic ratios established by the control settings selected on the counters.