IR remote control system for several dental X=ray units - has monoflop resetting IR transmitter to prevent cycle time being multiple of longest cycle

摘要

The remote control system has the cycle time of the infrared remote control associated with each X-ray unit chosen so that no integral multiple of the longest cycle time occurs and the difference between cycle times is greater, than the duration of the code telegrams. A monoflop outside the remote control changes the cycle time. The control's i.r. transmitter is reset by the trailing edge of the monoflop's output and thereby starts a new cycle. An inverter is connected in series with switched resistors to form various series circuits in parallel with the series combination of a capacitor and a NOR-gate.