Continuous temp. control for hair dryer - incorporates circuit breaker in series with diode and compensating resistor

摘要

The continuous temperature control for a hair dryer heating resistance (20) consists of a triac (2) switched on in a zero passage by a series resistance (3) at the output of a no-voltage circuit breaker (1). The no-voltage circuit breaker (1) has a compensating resistance (4) and a diode (5) with an operating voltage of around twelve Volts at its input. The no-voltage circuit breaker (1) has a temperature sensor (10), a series resistance (11) and a continuously adjustable potentiometer (12), for the temperature regulator and signal.