The investigation of nonstationary random processes arises in many models of control and learning systems. To aid in studying this class of systems, an electronic probability generator, EPI, was built. EPI can electronically ``flip'' a coin at a maximum rate of 500 times/sec. The probability of heads of this electronic coin can be varied from 0 to 1 and is a linear function of the input voltage. Graphs are presented to illustrate EPI's ability to generate independent events. EPI can also be used to generate sequences of heads and tails controlled by higher order probabilities. The only additional equipment required is an electronic switch.