Integrated circuit flasher

Details Integrated circuit flasher Integrated circuit flasher

1975-01-27

1976-02-24

Mullins, James B.

Electric lamp and discharge devices: systems

Special application

Vehicle

315200A, 315217, 315225, 340 81R, B60Q 142

Patent

active

039406571

ABSTRACT:
A flasher circuit is disclosed for use with a conventional automotive turn signal system. The flasher circuit comprises a flasher relay under the control of a free-running multivibrator. The multivibrator takes the form of a pair of intercoupled logic gates and an inhibiting means, in the form of a logic gate, disables the multivibrator when the turn signal switch is open and enables it so long as the turn signal switch is closed. The inhibiting logic gate is supplied with logic signals from the output of the multivibrator and a voltage sensing circuit connected with the turn signal switch. The flasher circuit is a two-terminal device and may be substituted for the well known hot-wire flasher without the circuit changes in the turn signal system. The logic gates preferably take the form of an integrated circuit on a single chip.

REFERENCES:
patent: 3771019 (1973-11-01), Bolinger

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