Abstract: A system for detecting the miswiring of an electrical appliance that includes a microprocessor having first and second input connections to sample signals on two different electrical power lines. The microprocessor further includes a third input connection for a neutral line. In an embodiment of the invention, there is at least one switch through which electrical power can flow into a load. The at least one switch is controlled by the microprocessor. In a particular embodiment, the microprocessor is configured to compare the signals sampled at the first and second input connections to determine whether the electrical appliance has been wired correctly.

Abstract: A system for detecting the miswiring of an electrical appliance that includes a microprocessor having first and second input connections to sample signals on two different electrical power lines. The microprocessor further includes a third input connection for a neutral line. In an embodiment of the invention, there is at least one switch through which electrical power can flow into a load. The at least one switch is controlled by the microprocessor. In a particular embodiment, the microprocessor is configured to compare the signals sampled at the first and second input connections to determine whether the electrical appliance has been wired correctly.

Abstract: A method and apparatus for an appliance control knob incorporating a microprocessor and a status display built into the control knob housing. Such a control knob gives the appliance a clean and uncluttered appearance, and allows a user of the appliance both to control the appliance, for example by adjusting the oven temperature setpoint, and to be informed of the status of the appliance, for example the actual oven temperature, in a way that is easy to understand and to use.

Abstract: A method and apparatus for an appliance control knob incorporating a microprocessor and a status display built into the control knob housing. Such a control knob gives the appliance a clean and uncluttered appearance, and allows a user of the appliance both to control the appliance, for example by adjusting the oven temperature setpoint, and to be informed of the status of the appliance, for example the actual oven temperature, in a way that is easy to understand and to use.

Abstract: A monostable, that is triggered by either positive or negative polarity horizontal sync pulses, supplies the horizontal deflection system of a monitor. A first transistor of the monostable has its emitter and its base connected through oppositely poled diodes to the horizontal sync input terminal of the monitor. Incoming horizontal sync pulses of either polarity trigger a respective one of the diodes to drive the first transistor into conduction. The time constant of the first transistor is selected to be slightly greater than the duration of the input sync pulses to preclude the monostable triggering on the trailing edge of a sync pulse.