Rangkaian Ding dong bel Rumah

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Judul : Rangkaian Ding dong bel Rumah

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    Rangkaian Ding dong bel Rumah

    This simple circuit an low cost ding dong bell suitable for calling bell purposes. It is made around IC 8021-2 . IC 8021 has an in-built circuitry to produce ding dong sound each time its pin 3 is pulled low. The sound is stored in a 4 bit ROM.a complementary-pair, two-transistor amplifier is used to amplify the sound to a fair level of audibility. A piezo tweeter or an 8-ohm, 500mW speaker can be used at the output.

    Ding dong bel Rumah

    Skema Rangkaian bel Rumah

    List Component bel Rumah:
    R1: 1K 1/4W Resistance
    C1: 10µF/12-25V Electrolytic Capacitance
    T1: BC548/c8050 NPN transistor
    T2: BC557/C8550 PNP transistor
    IC1: 8021-2 ding dong sound generator
    Ls1: Speaker tweeter 500 Mwatt - 5 watt
    S1: switch on/off
    S2: Switch Normally close
    B1: 3V Cell

    Each time when switch S2 is pressed, ding dong sound is produced twice. If you try to press switch S2 a second time when the first ding dong sound is still being produed, it has no effect whatever and the two ding-dong bell sounds will be invariably produced.S1 is the ON- OFF switch.Assemble the circuit on a good quality all pupose PCB.Don’t forget to use an IC holder for IC 8021.

    IC 8021 Description

    The 8021-2 is a ding-dong sound effect generator IC produced by LSI CMOS technology. With built-in RC oscillator and digital envelope circuits, minimal external components are required. This IC simulates the mechanical ding-dong sound, and is ideal for door bell application.

    IC 8021 Features
    - 1.3V to 3.3V operating voltage and low power consumption
    - One-shot mode of 2 ding-dong playing sequences
    - Standard TO-92 package form
    - Dynamic speaker can be driven with external NPN transistor


    IC 8021 Absolute Maximum Ratings
    DC Supply Voltage ........................................... -0.3V to +5.0V
    Operating Ambient Temperature .................... -10°C to 60°C
    Storage Temperature ....................................... -55°C to 125°C




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