555 electronic language model reception circuit

Published:2011/6/1 18:49:00 Author:TaoXi | Keyword: 555, electronic, language, model, reception circuit | From:SeekIC

As the figure 15-37 shows, the circuit is composed of the monostable trigger and the language integrated audio circuit, and this circuit can be used in the shop and restaurant.etc. The monostable trigger is composed of the 555 and R1, C2, when the guest touches the sequin A, the 555 circuit sets, pin-3 has the high electrical level to trigger IC2. IC2 is the language integrated circuit ICI5603 (or NS268.etc.), if pin-2 has the trigger electrical level signal, the internal memory starts working and sends out the voice of you are welcome through the speaker. At the same time the two LEDs turn on. When the 555 temporary state is finished, pin-3 has the low electrical level, the circuit is in quiet.



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