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利用LED数字钟的报闹功能去控制收音机并不难,但一般只能用继电器的通断预选固定的某一频率节目。在非预定时间内要更换其它频率节目,来回调整比较麻烦。在收音机内增加一个双连(不用调机构)和原双连之间用继电器J的两组接点(J_b、J_c)转换(见附图),则常态时,J释放,原双连接入电路,它的位置不影响新双连调频。假设固定在每天上午7点收听某台节目,则事先将新双连C_1调准在此台频率,并将该钟的报闹时刻校正在“上午7点”。之后,每天上午7点,J吸合,新双连接入,接通收音机电源,放出预定节目。J_a控
It is not hard to use the alarm function of LED digital clock to control the radio, but it is usually only able to preselect a fixed frequency program through the on-off of the relay. In the non-scheduled time to replace other frequency programs, back and forth to adjust more trouble. In the radio to add a double connection (no adjustment mechanism) and the original double between relay J J (J_b, J_c) conversion (see photo), then the normal state, J release, the original double connected into the circuit, Its position does not affect the new dual-band FM. Assuming fixed at 7:00 every day to listen to a program, then the new double connected C_1 alignment in this station frequency, and the alarm clock time correction in the “7:00 ”. After 7 am every day, J pull together, the new dual-connection into, turn on the radio power, release scheduled programs. J_a control