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18 pin police siren sound 2 led flasher 2-wire intercom 2N1304 2n1304 transistor 40v neon lamp 6v lantern battery 7213 time base generator ic ambulance amplifier radio AN-154 Application of 2n1304 automotive led flasher CIRCUIT FLASHER FOR 5 LED 6 VOLT emergency light circuit SCR emergency light circuit using SCR emergency light system using scr fastest finger first indicator FLASHER STANDARD MOTOR IC for electronic flasher IC FOR FLASHER ic siren lantern latching a transistor on-off scr driver LED astable multivibrator LED or Lamp Flasher light operated scr alarm LM3909 LM3909 equivalent multi tone siren multi tone siren circuit NSL-4944 NSL4944 police flasher police flashing led light police siren police Siren Sound police Siren Sound Generator five sounds scr regulator emergency light siren police siren police 5 tones Siren Sound Generator 3 sound Siren Sound Generator 7 wail sound Siren Sound Generator 9 sound solar led lantern thermal Flasher toy cars remote control transistor intercom circuit Triac trigger circuit met scope trigger impulse generator TWO WAY WIRE INTERCOM