The wireless alarm circuit with language chip

Published:2011/6/27 20:43:00 Author:Borg | Keyword: wireless alarm circuit, language chip | From:SeekIC

In the figure is the wireless alarm circuit with language chip. The alarm consists of the FM emitter, time-based circuit 555, regulated circuit and the language storage composed of the chip RX5017. In the figure, 555, R2, W1 and C7 compose the astable multi-resonance oscillator, whose frequency is f=l.44／(R1+Rwl)C7 which can be changed by adjusting W1. IC2 is the language chip RX5017, 3-pin is the power supply terminal, 5-pin is the maintain terminal of info storage, all of which are connected with the 6V battery by D2 to avoid power-off, 2-pin is the recording trigger terminal.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/The_wireless_alarm_circuit_with_language_chip.html

Print this Page | Comments | Reading(3)