| 摘要 |
<p>PURPOSE:To obtain a remote control circuit which copes with the remote control for a home use boiler having a timer function inexpensively by a simple constitution. CONSTITUTION:A remote control section 4 is connected to a control circuit 6 at the device side with a signal transmission line 5. In the circuit 6, a serial data signal from the section 4 is converted into a parallel signal at a shift register 15 and outputted to a latch circuit 16. The circuit 16 latches the data with a strobe signal and shares the data to each circuit. A comparison circuit 23 compares an output of a signal switching means 18 to which a state signal of a tank is applied with an output of the circuit 16, and outputs the comparison signal on a signal line 14. An output of a commercial frequency generating circuit 26 forming a pulse signal in synchronizing with the commercial power supply frequency is applied to one input channel of the means 18, and this pulse signal is given to the section 4 and a reference time is produced by counting the pulse signal.</p> |
