Lamp circuit for automobile

Details Lamp circuit for automobile Lamp circuit for automobile

1982-09-27

1984-10-16

Moore, David K.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Flashers

315200R, H05B 3700

Patent

active

044777477

ABSTRACT:
A flashing lamp circuit, having a first transistor in circuit with a lamp and power supply, provides intermittent flashing by intermittently turning the transistor on and off in response to an on-off input signal. The transistor is protected against surge currents when the lamp short-circuits by monitoring the lamp voltage and turning the first transistor off when the lamp voltage drops below a predetermined amount for a given period during which the on-off signal is on.

REFERENCES:
patent: 3660674 (1972-05-01), Bolinger
patent: 3663860 (1972-05-01), Phillips
patent: 3858088 (1974-12-01), Scarpino et al.

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