Maybe good enough to fool a vending machine There is this story

Today's Almost Entirely Useless Slot Machine Hack cheat slot machine bill acceptor Mechanical slot machines and their coin acceptors were sometimes susceptible to cheating devices and other scams These machines and their bill acceptors are cheat slot jp Voltage Spiking is a method of cheating a slot machine by sending a electronic spike into an ungrounded pulse bill validator When a spike hits

cheat slot injector Slot Machine Bill Validator Device As slot machines have gotten more sophisticated, so have the cheating methods In the old coin slot