RELAY FOR FOG STOP LAMPS Russian patent published in 2004 - IPC

FIELD: electrical engineering. SUBSTANCE: invention refers to switching on of fog stop lamps depending on permissive signal with the use of button switch. Device for realization of invention includes electromagnetic relay with protective diodes. First lead-out of make contact of relay is connected to lead coupling positive pole of power supply source, its second lead-out is linked to lead for connection of fog stop lamps, one end of winding is connected through protective diode to lead-out for connection of positive pole of power supply source and second end of winding is connected to output of transistor key to which input output of one half of microcircuit is connected. This half of microcircuit is counting flip-flop with presetting network realized on base of D flip-flop. Device also includes Schmitt flip-flop, input network, voltage stabilizer which input is connected to lead for connection of positive pole of permissive signal and which output is connected to power supply network of counting flip-flop and Schmitt flip-flop. Above- mentioned Schmitt flip-flop is realized on base of second half of microcircuit by feed of high-level signal to D, C, R inputs and by connection of two resistors to S input. Second lead-out of first resistor is connected to direct output Q which is connected to input of counting flip-flop and second lead-out of second resistor is connected to common connection point of first capacitor and third resistor. Second lead-out of first capacitor is connected to common bus of power supply source, second lead-out of third resistor is connected to output of inverter based on transistor and two resistors which input is connected to output of input network. EFFECT: reduced cost of relay with preservation of high level of noise immunity. 2 dwg